Java Interview Q&A video - https://youtu.be/WM351yrdlpk
In this slide we have answered definitely asked questions in JAVA interviews about Snake & Ladder game and Connection Pooling in JAVA with complete code example.
For more Basic and Advanced JAVA training videos visit this link - https://www.questpond.com/java/javaj2eedesignpattern.html
For more details contact questpond@questpond.com OR call +919967590707- 9619842789 - 9769000232.
Are you worried about your Python Homework? Are you afraid of your deadline lurking near? Leave your tensions and worries behind. Just Contact www.pythonhomeworkhelp.com Experts. With more than 90% of success rate, they are one of the reliable Python homework Help Experts. You can’t ignore them if you want good grades for your homework. You can also contact the anytime as they are available 24 x 7 in live chat.
ontents
· Introduction
· Objectives
· Configuration
· Shapes
· Controls
· Sounds
· Scoring
· Code Requirements
· Report
· Deliverables
· Grading
· Start Small
Introduction
The Final Project gives you the opportunity to apply the object-oriented software development skills you have acquired during the course to a significant but moderately-sized application. The following sections describe the general behavior of the application, the simulation, and the deliverable requirements for the project.
The final project for this class is a built upon your homeworks. You are going to create a very simple version of Asteroids, but with shapes.
I will also work through this with you and provide you a working demo on D2L by end of week 8
The template for the project is on D2L under Final Project.
Objectives
The objective is pretty simple. Create a keyboard driven video game, with you the player in the center of the screen. Shapes will enter the screen and you will need to shoot them. If any of the shapes collide with your ship your game will end.
What I will provide:
A template GUI to start with.
Trapping the keys and bound methods for them. You can find this
Configuration
Configuration.json is the games overall configuration file. Since this is a first attempt at such a project we may need to add additional parameters. You can use the ShapeParser as an example of how to parse this file. I would recommend you add additional utility methods to the Extractor utility class if needed. You may want to consider a singleton that stores all the configuration data. It will help you not only with design but the ability to hardcode debug values in it instead of having to constantly modify the configuration.json. The configuration file contains only best guesses as to what values to put in. You should adjust them accordingly for development then pick ones that are realistic for final release. Hint: By having slow speeds you can easily validate your game visually.
Below are the fields:
“game”– The main key for the file. Not used for anything internally.
“framespersecond” – int - The number of framespersecond, or the overall game speed. Use this value in Motion.java. Replace the ‘FRAMES_PER_SECOND’ with a call to your Configuration managers method for framespersecond.
“shotspeed” – float - The speed at which your shots will travel. Shots are not affected by friction.
“forwardthrust” – float - Each tap of the forward thrust increases the player’s x/y speed by 1. Remember in graphics ‘up’ is –y. I will provide you with the algorithms for this. Basically if the nose of the ship is at 0 degrees it’s cos 0 degrees, sin 0 degrees or +1.0x, 0y. If it’s at 45degress, it’s 1/sqrt(2), -1/sqrt(2), and at 0 its 0,-1. Again remember for y it’s inverted. I will double check to make sure this works.
"shapes" – float - This is the num.
I am Tim D. I am a Python Homework Expert at pythonhomeworkhelp.com. I hold a Master's in Python from, West Virginia University, USA. I have been helping students with their homework for the past 10 years. I solve homework related to Python.
Visit pythonhomeworkhelp.com or email support@pythonhomeworkhelp.com.
You can also call on +1 678 648 4277 for any assistance with Python Homework.
The Automated Poker-Player System provides widely known single player poker game with all requirements and rules of original game. This game has a deck of 52 cards with 13 values each and 4 suits. The automated poker player system is implemented in the ‘C#’ programming environment platform which consist of six classes, Card, DeckOfCards, DrawCards, DealCards, HandEvaluator, and the execution class Program.cs.
Source Code: https://github.com/DanishBangash/Automated-Poker-Player
Are you worried about your Python Homework? Are you afraid of your deadline lurking near? Leave your tensions and worries behind. Just Contact www.pythonhomeworkhelp.com Experts. With more than 90% of success rate, they are one of the reliable Python homework Help Experts. You can’t ignore them if you want good grades for your homework. You can also contact the anytime as they are available 24 x 7 in live chat.
ontents
· Introduction
· Objectives
· Configuration
· Shapes
· Controls
· Sounds
· Scoring
· Code Requirements
· Report
· Deliverables
· Grading
· Start Small
Introduction
The Final Project gives you the opportunity to apply the object-oriented software development skills you have acquired during the course to a significant but moderately-sized application. The following sections describe the general behavior of the application, the simulation, and the deliverable requirements for the project.
The final project for this class is a built upon your homeworks. You are going to create a very simple version of Asteroids, but with shapes.
I will also work through this with you and provide you a working demo on D2L by end of week 8
The template for the project is on D2L under Final Project.
Objectives
The objective is pretty simple. Create a keyboard driven video game, with you the player in the center of the screen. Shapes will enter the screen and you will need to shoot them. If any of the shapes collide with your ship your game will end.
What I will provide:
A template GUI to start with.
Trapping the keys and bound methods for them. You can find this
Configuration
Configuration.json is the games overall configuration file. Since this is a first attempt at such a project we may need to add additional parameters. You can use the ShapeParser as an example of how to parse this file. I would recommend you add additional utility methods to the Extractor utility class if needed. You may want to consider a singleton that stores all the configuration data. It will help you not only with design but the ability to hardcode debug values in it instead of having to constantly modify the configuration.json. The configuration file contains only best guesses as to what values to put in. You should adjust them accordingly for development then pick ones that are realistic for final release. Hint: By having slow speeds you can easily validate your game visually.
Below are the fields:
“game”– The main key for the file. Not used for anything internally.
“framespersecond” – int - The number of framespersecond, or the overall game speed. Use this value in Motion.java. Replace the ‘FRAMES_PER_SECOND’ with a call to your Configuration managers method for framespersecond.
“shotspeed” – float - The speed at which your shots will travel. Shots are not affected by friction.
“forwardthrust” – float - Each tap of the forward thrust increases the player’s x/y speed by 1. Remember in graphics ‘up’ is –y. I will provide you with the algorithms for this. Basically if the nose of the ship is at 0 degrees it’s cos 0 degrees, sin 0 degrees or +1.0x, 0y. If it’s at 45degress, it’s 1/sqrt(2), -1/sqrt(2), and at 0 its 0,-1. Again remember for y it’s inverted. I will double check to make sure this works.
"shapes" – float - This is the num.
I am Tim D. I am a Python Homework Expert at pythonhomeworkhelp.com. I hold a Master's in Python from, West Virginia University, USA. I have been helping students with their homework for the past 10 years. I solve homework related to Python.
Visit pythonhomeworkhelp.com or email support@pythonhomeworkhelp.com.
You can also call on +1 678 648 4277 for any assistance with Python Homework.
The Automated Poker-Player System provides widely known single player poker game with all requirements and rules of original game. This game has a deck of 52 cards with 13 values each and 4 suits. The automated poker player system is implemented in the ‘C#’ programming environment platform which consist of six classes, Card, DeckOfCards, DrawCards, DealCards, HandEvaluator, and the execution class Program.cs.
Source Code: https://github.com/DanishBangash/Automated-Poker-Player
This tutorial explains step by step writing a simple guessing game where the player guess the number selected by the computer and the goal is to introduce the power and usage of RANDOM as well as the how to benefit CURRENTTIMEMILLIS method of the System class in order to check how much it took the player guessing the correct number.
I am Fabian H. I am a Computer Science Assignment Help Expert at programminghomeworkhelp.com. I hold a Masters in Programming, Deakin University, Australia. I have been helping students with their homework for the past 8 years. I solve assignments related to Computer Science.
Visit programminghomeworkhelp.com or email support@programminghomeworkhelp.com.You can also call on +1 678 648 4277 for any assistance with Computer Science assignments.
BSidesDelhi 2018: Headshot - Game Hacking on macOSBSides Delhi
Presenter: Jai Verma
Abstract: Game hacking is a major contributor to the hacking economy. People shell out a lot of money for hacks which help them cheat at multiplayer games. These hacks can range from enhancing in-game abilities for gaining an upper hand in the game, to bypassing in-app purchases. With the advent of anti-cheat such as VAC (Valve Anti Cheat), the techniques employed by hackers to cheat at games have become increasingly refined. These techniques are comparable to those utilised in sophisticated malware and rootkits. These techniques include runtime process injection, function interposition, and proxying network traffic to name a few. To avoid detection, hackers even resort to custom kernel drivers to interact with the game process. This talk will detail a few of the techniques utilised by game hackers and malware developers alike, through the hacking of an open-source game. I will showcase some hacks for an open-source FPS game by describing the method in detail for the macOS platform. While the demo will be macOS specific, the approach applies to all modern operating systems.
Lab Assignment 17 - Working with Object ArraysIn the old days we w.pdfeyewaregallery
Lab Assignment 17 - Working with Object Arrays
In the old days we would do these projects as applets. Unfortunately, applets are not as secure as
Sun / Oracle once thought they were. Now, it is almost impossible to run an applet over the web.
If you want to see how the Tic-Tac-Toe game looks you will have to view this video
In this homework, you\'ll build your own version of TicTacToe using JLabels, GridLayout, and a
couple arrays. Before you get started, however, why don\'t you take a minute to play a game?
Declare a two-dimensional array of primitive values
Declare a two-dimensional array of object references
Initialize each of the elements in a two-dimensional array of object references
Use a pair of nested for loops to process the elements in a two-dimensional array
Create a class called TicTacToe. Place it in a file called TicTacToe.java
Have your class extend from JFrame
Have your class implement ActionListener and MouseListener.
Create all of the methods needed for the ActionListener and MouseListener interfaces.
Make sure to import javax.swing.*, java.awt.* and java.awt.event.*
Before ddefining your attributes you need to create a container called content and initialize it by
sending the getContentPane() message to this.
Define your application\'s attributes. The TicTacToe program has three different kinds of fields
that you must define before you can compile the program successfully. Make sure you define
your fields and check for errors before you attempt to go further.
Here are the three kinds of fields:
1. Program Arrays
The TicTacToe program has two \"parallel\", 3 x 3, two dimensional arrays. Start your
programming by defining these two arrays:
The first of these is an array of JLabel objects. This array, named grid, is used to display the
actual Xs and Os on your screen. Each JLabel will display an X, and O, or a blank.
The second array is an array of char primitives. This array, named game, is used to simplify
keeping score as the game is played. Each element in game contains a space \' \' if the position
has yet to be played, an \'X\', if the position contains an X, and an \'O\' if the position contains an
O.
2. Graphical User-interface Fields
In addition to the JLabels that make up the array named grid, the TicTacToe application contains
the following user-interface elements. Define these elements after you\'ve finished defining your
arrays:
A JButton object named restart. The user can restart the game by clicking this Button.
A JPanel named p. Use the default constructor to create p; it will hold the JLabels in grid
A JLabel named status. This will keep the user informed of the game\'s progress. You might
want to initialize status to a helpful welcome message.
3. Primitive Fields
Your program will contain the following primitive fields which you\'ll use as you play the game:
An int named numClicks that will keep track of how many X\'s and O\'s are displayed.
A boolean named isDone which is used to determine when the game is .
We have created a software. The name of our software is soduko solver.This project is about to solving a Sudoku problem by a particular method which given a correct solution for given problem.
We work very hard to complete this project and able to build logic that can find out the solution of Sudoku problem and it generate solution for some multiple grids …
Link to the video - https://youtu.be/BKynEBPqiIM
Get complete course from the below link :-
https://www.questpond.com/netc-fundamentals-net-collections-generics/cid22
Below is the list of Csharp interview questions covered in the video.
Question 1 :- Explain difference between .NET and C# ?
Question 2 :- .NET Framework vs .NET Core vs .NET 5.0
Question 3 :- What is IL ( Intermediate Language) Code ?
Question 4 :- What is the use of JIT ( Just in time compiler) ?
Question 5 :- Is it possible to view IL code ?
Question 6 :- What is the benefit of compiling in to IL code ?
Question 7 :- Does .NET support multiple programming languages ?
Question 8 :- What is CLR ( Common Language Runtime) ?
Question 9 :- What is managed and unmanaged code ?
Question 10 :- Explain the importance of Garbage collector ?
Question 11 :- Can garbage collector claim unmanaged objects ?
Question 12 :- What is the importance of CTS ?
Question 13 :- Explain CLS ?
Question 14 :- Difference between Stack vs Heap ?
Question 15 :- What are Value types & Reference types?
Question 16 :- Explain boxing and unboxing ?
Question 17 :- What is consequence of boxing and unboxing ?
Question 18 :- Explain casting,implicit casting and explicit casting ?
Question 19 :- What can happen during explicit casting ?
Question 20 :- Differentiate between Array and ArrayList ?
Question 21 :- Whose performance is better array or arraylist ?
Question 22 :- What are generic collections ?
Question 23 :- What are threads (Multithreading)?
Question 24 :- How are threads different from TPL ?
Question 25 :- How do we handle exceptions in C#(try/catch)?
Question 26 :- What is the need of finally?
Question 27 :- Why do we need the out keyword ?
Question 28 :- What is the need of Delegates ?
Question 29 :- What are events ?
Question 30 :- Whats the difference between Abstract class and interface ?
For more details contact questpond@questpond.com OR call +919967590707- 9619842789 - 9769000232.
This tutorial explains step by step writing a simple guessing game where the player guess the number selected by the computer and the goal is to introduce the power and usage of RANDOM as well as the how to benefit CURRENTTIMEMILLIS method of the System class in order to check how much it took the player guessing the correct number.
I am Fabian H. I am a Computer Science Assignment Help Expert at programminghomeworkhelp.com. I hold a Masters in Programming, Deakin University, Australia. I have been helping students with their homework for the past 8 years. I solve assignments related to Computer Science.
Visit programminghomeworkhelp.com or email support@programminghomeworkhelp.com.You can also call on +1 678 648 4277 for any assistance with Computer Science assignments.
BSidesDelhi 2018: Headshot - Game Hacking on macOSBSides Delhi
Presenter: Jai Verma
Abstract: Game hacking is a major contributor to the hacking economy. People shell out a lot of money for hacks which help them cheat at multiplayer games. These hacks can range from enhancing in-game abilities for gaining an upper hand in the game, to bypassing in-app purchases. With the advent of anti-cheat such as VAC (Valve Anti Cheat), the techniques employed by hackers to cheat at games have become increasingly refined. These techniques are comparable to those utilised in sophisticated malware and rootkits. These techniques include runtime process injection, function interposition, and proxying network traffic to name a few. To avoid detection, hackers even resort to custom kernel drivers to interact with the game process. This talk will detail a few of the techniques utilised by game hackers and malware developers alike, through the hacking of an open-source game. I will showcase some hacks for an open-source FPS game by describing the method in detail for the macOS platform. While the demo will be macOS specific, the approach applies to all modern operating systems.
Lab Assignment 17 - Working with Object ArraysIn the old days we w.pdfeyewaregallery
Lab Assignment 17 - Working with Object Arrays
In the old days we would do these projects as applets. Unfortunately, applets are not as secure as
Sun / Oracle once thought they were. Now, it is almost impossible to run an applet over the web.
If you want to see how the Tic-Tac-Toe game looks you will have to view this video
In this homework, you\'ll build your own version of TicTacToe using JLabels, GridLayout, and a
couple arrays. Before you get started, however, why don\'t you take a minute to play a game?
Declare a two-dimensional array of primitive values
Declare a two-dimensional array of object references
Initialize each of the elements in a two-dimensional array of object references
Use a pair of nested for loops to process the elements in a two-dimensional array
Create a class called TicTacToe. Place it in a file called TicTacToe.java
Have your class extend from JFrame
Have your class implement ActionListener and MouseListener.
Create all of the methods needed for the ActionListener and MouseListener interfaces.
Make sure to import javax.swing.*, java.awt.* and java.awt.event.*
Before ddefining your attributes you need to create a container called content and initialize it by
sending the getContentPane() message to this.
Define your application\'s attributes. The TicTacToe program has three different kinds of fields
that you must define before you can compile the program successfully. Make sure you define
your fields and check for errors before you attempt to go further.
Here are the three kinds of fields:
1. Program Arrays
The TicTacToe program has two \"parallel\", 3 x 3, two dimensional arrays. Start your
programming by defining these two arrays:
The first of these is an array of JLabel objects. This array, named grid, is used to display the
actual Xs and Os on your screen. Each JLabel will display an X, and O, or a blank.
The second array is an array of char primitives. This array, named game, is used to simplify
keeping score as the game is played. Each element in game contains a space \' \' if the position
has yet to be played, an \'X\', if the position contains an X, and an \'O\' if the position contains an
O.
2. Graphical User-interface Fields
In addition to the JLabels that make up the array named grid, the TicTacToe application contains
the following user-interface elements. Define these elements after you\'ve finished defining your
arrays:
A JButton object named restart. The user can restart the game by clicking this Button.
A JPanel named p. Use the default constructor to create p; it will hold the JLabels in grid
A JLabel named status. This will keep the user informed of the game\'s progress. You might
want to initialize status to a helpful welcome message.
3. Primitive Fields
Your program will contain the following primitive fields which you\'ll use as you play the game:
An int named numClicks that will keep track of how many X\'s and O\'s are displayed.
A boolean named isDone which is used to determine when the game is .
We have created a software. The name of our software is soduko solver.This project is about to solving a Sudoku problem by a particular method which given a correct solution for given problem.
We work very hard to complete this project and able to build logic that can find out the solution of Sudoku problem and it generate solution for some multiple grids …
Link to the video - https://youtu.be/BKynEBPqiIM
Get complete course from the below link :-
https://www.questpond.com/netc-fundamentals-net-collections-generics/cid22
Below is the list of Csharp interview questions covered in the video.
Question 1 :- Explain difference between .NET and C# ?
Question 2 :- .NET Framework vs .NET Core vs .NET 5.0
Question 3 :- What is IL ( Intermediate Language) Code ?
Question 4 :- What is the use of JIT ( Just in time compiler) ?
Question 5 :- Is it possible to view IL code ?
Question 6 :- What is the benefit of compiling in to IL code ?
Question 7 :- Does .NET support multiple programming languages ?
Question 8 :- What is CLR ( Common Language Runtime) ?
Question 9 :- What is managed and unmanaged code ?
Question 10 :- Explain the importance of Garbage collector ?
Question 11 :- Can garbage collector claim unmanaged objects ?
Question 12 :- What is the importance of CTS ?
Question 13 :- Explain CLS ?
Question 14 :- Difference between Stack vs Heap ?
Question 15 :- What are Value types & Reference types?
Question 16 :- Explain boxing and unboxing ?
Question 17 :- What is consequence of boxing and unboxing ?
Question 18 :- Explain casting,implicit casting and explicit casting ?
Question 19 :- What can happen during explicit casting ?
Question 20 :- Differentiate between Array and ArrayList ?
Question 21 :- Whose performance is better array or arraylist ?
Question 22 :- What are generic collections ?
Question 23 :- What are threads (Multithreading)?
Question 24 :- How are threads different from TPL ?
Question 25 :- How do we handle exceptions in C#(try/catch)?
Question 26 :- What is the need of finally?
Question 27 :- Why do we need the out keyword ?
Question 28 :- What is the need of Delegates ?
Question 29 :- What are events ?
Question 30 :- Whats the difference between Abstract class and interface ?
For more details contact questpond@questpond.com OR call +919967590707- 9619842789 - 9769000232.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
The French Revolution Class 9 Study Material pdf free download
Most asked JAVA Interview Questions & Answers.
1. JAVAInterview Questions and Answers with
Practical example
Questions discussed as a part of this course areon –
1. Snake & Ladder
2. Connection Pooling
2. Why and what this course is all about?
In order to understand this demonstration you should have to know the basics of arrays and
collections from JAVA Perspective.
The three major part of this course are –
• Logic Development
• Designing &
• Converting design into Coding
With practical interview questions you will also learn to improve your coding capability. To
develop your coding capability first learn to think logically and then convert that logic to design.
This concept goes as per the demand of today’s IT industry.
These coding questions play an important role during the interview process right from software
developer all the way till architects level. Here will be thoroughly understanding the solutions to
some of the important coding questions which will enable you to clear interview very easily.
3. Snake & Ladder
What is Snake & Ladder?
It is one of the popular board game worldwide mainly amongst children. It is played with the
help of a Dice where a dice has six sides with number 1 to 6. In the middle of the game you will
come across ladder climb and snake bite/snake mouth. Snake bite will bring you down all the
way till its tail position and ladder will help you going up. Players roll the dice one by one and
when they roll the dice based upon the points in the dice they will move starting from 1 and
their aim is to reach 100. If 6 comes in the dice then the player can roll again. Snake & Ladder
game consists of 2 or more players and the one who reaches 100 gets declared as winner.
Will be writing a program for Snakes and Ladders with practical examples. We will try to
capture the points where the snake’s mouth is which also known as head and where the snake’s
tail goes we will do coding for the same and how this game works so to see the same will create
solution here.
4. Solution to this question –
In this solution we will code to get output for below –
1. Capture positions where snake head and tail exists.
2. Capture positions where ladder start and end exists.
3. Capture the Dice Value.
4. Game ends if player reaches end.
To start with the coding of this program first we will create a new Maven project with name
snake-and-ladder.
And inside this Maven project we will create the program to perform Snake and Ladder
5. Create a new package called as com.vishwa.snakeladder and inside this we will create a JAVA
Class and will call it as GameMain and within this JAVA Class we will write our public static
void main program.
Now next step is we need to create positions where Snakes and Ladders exist. We will create a
method getSnakePositions. Create a Map entry within this to store Snake Positions. We can
create a treemap and return this to store the positions.
6. Same way we will write method to get Ladder positions.
After doing above steps we will capture head and tail positions of snakes for which we will write
below code :-
7. Same way we will write method to get Ladder positions.
Both of the above written code will help us maintaining the positions. Now within our main
method will call MAPS using hard coded values. Also we need to capture no. of players or
participants by using SCANNER. Scanner(System.in) will allow us to capture the input from the
console and we can get the no. of participants and we can just print out the no. of players.
8. Each player of Snake & Ladder game will roll a dice to get random output. So our next step is to
write Roll Dice function with the range of 1 to 6. We can use random class which is available in
JAVA.
Now the logic of the game is to catch a Boolean value which will be false and variable will be set
True whenever the game is over, until the game is not over will keep on looping, looping will
continue the game. We will also need other things like variable to indicate current participants
and collection to store score of each participant.
Within the while loop will print the player no where currentPlayer will tell how many players
are playing the game currently. For which we need to write below function –
9. Further to that we will require Score of each participant. To get Score we have something called
as ARRAY. This score will get stored in COLLECTION which is implemented by Array and we
can print it.
Also create integer score which capture same number as the no. of participants where we will
initialize everything to 0 as an Array starts with 0. Here we need to do score[currentPlayer-1]);
because current player starts with 1 while within the array it starts with 0 that’s why we have to
do this.
10. We will write code for where user will roll dice. Current Score of the player and roll dice will
make participants go to next position. Writing this code will give us random dice. Below that we
also create temporary score where participants would reach. This temporary score will take
participant to snake mouth or to climb ladder and to determine the same we will use if loop. If
temporary score is present there then the user will not go to the location which we found out
first but will go to the location which is given by the value of the score.
11. The user will go lower if snake bites and if the case is different if user will go to the location
which will be a head due to the ladder. Ladder always go to the higher location so both of these
values are captured here. Using else and if conditions we can make participants go ahead
or behind. To make it more user friendly will write the statements as snake bite for going
down and ladder climb for going ahead.
12. Next step is to declare Boolean Variables to check condition. We have 3 Boolean variables that
are as follows –
• boolean isSnakeBite
• boolean isLadderClimb
• boolean isDiceSix =false
The Boolean values which we have created we will initialize them to false so when we go to the
condition we can come to know whether they are at this location only.
We can isSnakeBite = true; , isLadderClimb = true; isdicevalue correct that also we need DiceSix
= (dicevalue ==6); If dice value comes six each dice value will become true else it will become
false.
If player got 6 he can continue to roll the dice. After getting 6 and if he reaches the position
where snake bites him so he cannot continue or retry. other cases he will get a retry so we have
to check for that. Also we will have to check after the calculation of temp score if temp score 0
then what will happen is we can say the game will be over. Let’s set condition and method for
the same in our code.
13.
14. After this we will see retry condition. For example participant is at 97, he rolls the dice and gets
6 then in such he will not get another chance to roll dice. There are many conditions but first
two important conditions are Snake should not hit the player and the temp score should be less
than or equal to100, it should not be more than 100. Another condition is that Dice Six or
Ladder Climb, in this two cases player will get chance to retry so will put this condition also.
Else there is no retry so we will have to implies the current players, if we have three current
players current player started with 1 next will be 2 and then 3, after 3 again it’s a round robin
fashion means other three players will get chance to roll the dice or depending on how many
players are in the game other players will get chance to play.
And finally we have to capture/store the score of current player driven by temp score. If the
player is hit by snake or he climbs ladder, in these cases temp score is reflected if that is not the
case then the tempScore will be the value of the current score + dice value.
15. We will also need a roll dice post pressing button for user with the use of Sanner for which you
will write below highlighted code lines. One more we have to do is to have an enter option. Use
scanner.nextLine(); is capable of taking enter task by participants.
16. At the start of the game we should see two statements as Welcome to snake and ladder
tournament –
After doing correct coding the output you will get as below –
17. At the start of the game we should see two statements as Welcome to snake and ladder
tournament –
After doing correct coding the output you will get as below –
18. This was a short demonstration with code snippet on
Snake & Ladder game where we coded for Snake Bite,
Ladder Climb, Snake Position, Ladder Position, DiceSix,
Roll Dice, Temp Score, Starting Point, End game, Enter
key. The advantage of writing a program in this
manner is that we can extend to any number of
players to make it a full tournament as per the
expectation of people.
19. CONNECTION POOLING
Understand what exactly is Connection Pool in JAVA?
Connection pooling is a Data Access Pattern which deals more with data. It maintains a Cache of
connections which includes all available connections also the connections which are at use. Its
moto is to reduce over head. The arrows in below diagram shows that used connections are
given back to the available pool for reuse.
We will try to maintain a pool of available connections. This pool will store N number of
connections. This connection pooling can be done using any database. In our example we will
implement the connection pool using MySQL Database in JAVA.
20. First, in our pom.xml we need to add the dependency of mysql-connector-java to make use of
JDBC connector to connect to database. Inside package we have creates new package which we
named as com.Vishwa and inside this will create two more new packages “ConnectionPool” and
“util”. Within util package we will create a class “Connectionutil”
After this the first step we have to do is create method to get a database connection. The jar will
be initialized within this package for which we loaded Driver class within try catch block. This
driver class is coming with new mysql driver. This is new version of mysql jar which contains
“cj” within the entire package. Driver class changes from database to database, you are free to
use whatever database driver is available for your particular database. Incase, you are using
different database than mysql we have to use drive class of that that database.
21. Next step is to create connection object. Inside DriverManager class we getConnection where
we need dbUrl, Username and Password. Also pass an argument for these three functions(dbUrl,
Username and Password) and inside try catch we will store it as it will thrown an exception. We
will include standard e.printStackTrace(); which is available with exception and we will return
connection and this will get replaced with loggers. This try catch block of loading drivers will be
placed inside a static block which we will execute only at the time of class loading and it will
not get loaded every time and once this code is ready will format the code (Click on Code
Format Code) to make it look good.
22.
23. And utility class helps us to create DB connection. This utility we will use inside our coding class
and name this as DbConnectionPool.
Now inside this DbConnectionPool we will create public method returning a connection. We
can pass list of properties or map of property or simply properties within getDbConnectionPool.
To pass these properties we will require dbUrl, we can also pass username as well as password.
One more optional attribute which we can pass is “int initialCapacity” , this attribute will tell us
how many connections we want to maintain in the pool. DbConnectionPool is public static
method and <ListConnection> is we will mark as private method, will name it as
availableconnections.
24. We will have to import the corresponding interfaces and packages. get dbConnection instead of
making this as static we can keep it private so that it becomes available at variable level and
create a private constructor. Within this private constructor we can pass this properties which
we have so that it can use it correspondingly in creating object.
Now inside initial capacity code will put our try catch block and within this we can create our
connections and add it within availableConnections. Due to intial capacity method we can call
our ConnectionUtil. We will make this as a static method because it is a utility method.
Generally utility methods are generally static, we can say ConnectionUtil.createDbConnection()
and pass the dbUrl followed by the username and password. These are the available
connections, so we are creating number of connections and adding to the availabelConnections.
We can return new DbConnectionPool with all these properties which we passed as a part of
the method. DbConnectionPool we will mark as public so it can be called by all and
availableConnection is marked private as it can be called by within function only.
25. Then our next step will be to create list of busy/occupied connections.
26. We will need to export a public method for retrieve connection and within retrieve connection
we will check if available connections is empty. If the connections are empty will print a
message as No connection available or else we can return a connection here. We can add this
connection to the occupied Connections and then remove it from the available Connections.
After applying this method this will get removed and at final we can return the connection.
This “retreieveConnection” method will allow to retrieve the connection. It can throw us an
exception or return us null if connections are not available.
27. Next task is to create release method with Boolean datatype. For releasing connection we will
require the connection object. availableConnection.add(connection); and again Boolean
isRemoved = occupiedConnection.remove() , remove can also take an object so we will pass the
connection object and then finally return isRemoved; We will put
System.put.println(“connection released “ +isRemoved); Also at the time of getting connection we
can say connection received. Below is the code to retrieve the connection and create a release
method.
28. By using two list we are able to maintain a list of availableConnections as well as the list of
occupiedConnections. The second list i.e. occupiedConnections is optional, we can remove it
from the main list and then again add it after use.
Here we completes the implementation of Simple DbConnectionPool. Now will run this
program, for that we need to create DbConnectionPoolTestClass.
29. Inside this class we will create Public static void main and within this we will create
DbConnectionPool and will pass dbUrl. In case of My SQL we can pass dbUrl like this. It
indicates database name and ip address at the port.
We are using below database which consists of Dogs and Users table.
30. It is followed by the username and the password. In real world you will never give out a
password like this(always keep password encryption ON). You will try to encrypt and decrypt
the password correspondingly so that it becomes easy to share the code. After username
password we will also argument for initial capacity to 10 that means 10 connections will be
available in the form of cache and which can be used correspondingly.
Create a method to print statistics public void printstacks()
Public void printStacks(){
System.out.println(“ Available connections --->”+availableConnections.size());
System.out.println(“ In use connections --->”+occupiedConnections.size());
31. Below is code for retrieving connection and print stacks.
Now will run the program to see the output of DbConnectionPool.
32. In the shown output image you will see –
The connections were received.
2 in use connections we got out of 10 connections.
Available connections were 8.
Releasing the connection and print Stacks again the release connection became available in the
AvailableConnection and in use connection it is 1.
So the advantage of using the Connection Pooling is that it gives choice of how many
connections is required and it stores same.
There is a method we need to write to increase no. of connections. The loop becomes same and
instead of using initial capacity we can use more. When we do this we will also have to pass this
parameters because we are not storing it somewhere. If we have stored in the class we need not
have to do this so we can again keep it same as earlier one and we can again pass the int more.
33. In real world never use or make a connection pool unless you have some sort of custom
requirement. We will make use of connection pools because there are many connection pools
already available as third-party dependencies. Some available connection pool are – Apache
DPCP , Apache DB connection pool, C3 connection pool and also there is super-fast lite weight
connection pooling by Hikari. Third part connection pooling gives us same features that we saw
and also many more options and properties. This is a compete working coding example which
makes use of connection and use of a connection to store all the available connections.
34. GO DOWN BELOW TO THE DESCRIPTION TO GET MORE
DETAILED VIDEO LINK FOR SAME SOLUTIONS OF SNAKES
& LADDERS AND CONNECTION POOLING BY
THANK YOU FOR WATCHING…………..