In this modern age automation is taking place in every field of life. This automatic DOL starter of 3 phase induction motor is also a work in this automation process. Induction motors find their application in vast field of engineering and daily life. This project implements a device which provides automation to the 3 phase induction operation. Due to wide range of application induction motor automation in working of induction motor will cover a wide area of automation. There are different techniques to start an Induction Motor but there are some drawbacks with the traditional motor starters which are using in our day to day life .One major disadvantage of the traditional motor starters are they do not have a mechanism to restart them when power is resumed after power cut while the machine is in running condition.To over come this disadvantage we have designed a circuit of AUTOMATIC CONTROL OF DIRECT ONLINE STARTER

1. VARDHAMAN COLLEGE OF ENGINEERING
INTERNSHIP REVIEW
DATA STRUCTURES USING JAVA
NAME -BANDARU SANDEEP
ROLL NUMBER – 20885A0219
BRANCH – EEE
SECTION - A

2. • Java is a programming language and computing platform first released by
Sun Microsystems in 1995. It has evolved from humble beginnings to
power a large share of today’s digital world, by providing the reliable
platform upon which many services and applications are built. New,
innovative products and digital services designed for the future continue to
rely on Java, as well.
• While most modern Java applications combine the Java runtime and
application together, there are still many applications and even some
websites that will not function unless you have a desktop Java installed.
Java.com, this website, is intended for consumers who may still require
Java for their desktop applications – specifically applications targeting
Java 8.
INTRODUCTION

3. DATA TYPES

4. INTRODUCTION TO OOPS
Object-oriented programming System(OOPs)​ is a
programming paradigm based on the concept of ​“objects”​
and ​“classes”​ that contain data and methods. The primary
purpose of OOP is to increase the flexibility and
maintainability of programs. It is used to structure a
software program into simple, reusable pieces of
code ​blueprints​ (called ​classes​) which are used to create
individual instances of objects​.

5. BASICS OF OOPS
What is an Object?
The object is an entity that has a state and a behavior associated with it. It may
be
any real-world object like the mouse, keyboard, chair, table, pen, etc.
Objects have states and behaviors. Arrays are objects.​ You've been using
objects all
along and may not even realize it. Apart from primitive data types, objects are
all
around in java.
What is a Class?
A class is a ​blueprint​ that defines the variables and the methods
(Characteristics)
common to all objects of a certain kind.
Example: If Car is a class, then Maruti 800 is an object of the Car class. All cars
share
similar features like 4 wheels, 1 steering wheel, windows, breaks etc. Maruti

6. ENCAPSULATION
 Encapsulation Encapsulation is defined as the wrapping up of data under a single
unit. It is the mechanism that binds together code and the data it manipulates.
Another way to think about encapsulation is, it is a protective shield that prevents the
data from being accessed by the code outside this shield. ● Technically in
encapsulation, the variables or data of a class is hidden from any other class and
can be accessed only through any member function of its own class in which they
are declared. ● As in encapsulation, the data in a class is hidden from other classes
using the data hiding concept which is achieved by making the members or methods
of class as private and the class is exposed to the end user or the world without
providing any details behind implementation using the abstraction concept, so it is
also known as combination of data-hiding and abstraction.. 1 ● Encapsulation can
be achieved by: Declaring all the variables in the class as private and writing public
methods in the class to set and get the values of variables.

7. INHERITANCE
● Inheritance is a powerful feature in Object-Oriented
Programming.
● Inheritance can be defined as the process where
one class acquires the
properties (methods and fields) of another. With the
use of inheritance, the
information is made manageable in a hierarchical
order.
● The class which inherits the properties of the other is
known as subclass
(derived class or child class) and the class whose
properties are inherited is
known as superclass (base class, parent class).

8. WHAT ARE DATA STRUCTURES?
•Data Structure in java is defined as the collection of data pieces that offers an effective means
of storing and organising data in a computer. Linked List, Stack, Queue, and arays are a few
examples of java data structures.
•Array
•Linked List
•Stack
•Queue
•Binary Tree
•Binary Search Tree
•Heap
•Hashing
•Graph

9. THANK YOU