File input and output operations in Java are performed using streams. There are two types of streams - byte streams and character streams. Byte streams handle input/output at the byte level while character streams handle input/output at the character level using Unicode encoding. The File class in Java represents files and directories on the filesystem and provides methods to perform operations like creating, reading, updating and deleting files.
Java I/O (Input and Output) is used to process the feedback and produce the outcome based on the feedback. Java uses the idea of circulation to make I/O function fast. The java.io package contains all the sessions required for feedback and outcome functions.
Java I/O (Input and Output) is used to process the feedback and produce the outcome based on the feedback. Java uses the idea of circulation to make I/O function fast. The java.io package contains all the sessions required for feedback and outcome functions.
file stream
input stream
output stream
input stream reads data from the source
output stream writes data to the destination
advantages
disadvantages
examples for both the input and output stream
Exceptions, I/O and Threads Input and Output in Java: The File Class, Standard Streams, Keyboard
Input, File I/O Using Byte Streams, Character Streams, File I/O Using Character Streams -
Buffered Streams, File I/O Using a Buffered Stream, Keyboard Input Using a Buffered Stream,Writing Text Files. Threads: Threads vs. Processes, Creating Threads by Extending Thread,
Creating Threads by Implementing Runnable, Advantages of Using Threads, Daemon Threads,
Thread States, Thread Problems, Synchronization. Exceptions: Exception Handling, The Exception
Hierarchy, throws statement, throw statement, Developing user defined Exception Classes- The
finally Block.
In this tutorial, I take you through an important feature of Java: File Operations. We are going to take a look at Character and Byte Streams, some built-in Classes and their functionalities to be able to perform file operations. Then we are going to learn about a famous concept called exception handling. We are going to finalize this tutorial with Number Formatting.
Check out rest of the Tutorials: https://berksoysal.blogspot.com/2016/06/java-se-tutorials-basics-exercises.html
Java I/O (Input and Output) is used to process the feedback and produce the outcome based on the feedback. Java uses the idea of circulation to make I/O function fast. The java.io package contains all the sessions required for feedback and outcome functions.
Java I/O (Input and Output) is used to process the feedback and produce the outcome based on the feedback. Java uses the idea of circulation to make I/O function fast. The java.io package contains all the sessions required for feedback and outcome functions.
file stream
input stream
output stream
input stream reads data from the source
output stream writes data to the destination
advantages
disadvantages
examples for both the input and output stream
Exceptions, I/O and Threads Input and Output in Java: The File Class, Standard Streams, Keyboard
Input, File I/O Using Byte Streams, Character Streams, File I/O Using Character Streams -
Buffered Streams, File I/O Using a Buffered Stream, Keyboard Input Using a Buffered Stream,Writing Text Files. Threads: Threads vs. Processes, Creating Threads by Extending Thread,
Creating Threads by Implementing Runnable, Advantages of Using Threads, Daemon Threads,
Thread States, Thread Problems, Synchronization. Exceptions: Exception Handling, The Exception
Hierarchy, throws statement, throw statement, Developing user defined Exception Classes- The
finally Block.
In this tutorial, I take you through an important feature of Java: File Operations. We are going to take a look at Character and Byte Streams, some built-in Classes and their functionalities to be able to perform file operations. Then we are going to learn about a famous concept called exception handling. We are going to finalize this tutorial with Number Formatting.
Check out rest of the Tutorials: https://berksoysal.blogspot.com/2016/06/java-se-tutorials-basics-exercises.html
Adjusting primitives for graph : SHORT REPORT / NOTESSubhajit Sahu
Graph algorithms, like PageRank Compressed Sparse Row (CSR) is an adjacency-list based graph representation that is
Multiply with different modes (map)
1. Performance of sequential execution based vs OpenMP based vector multiply.
2. Comparing various launch configs for CUDA based vector multiply.
Sum with different storage types (reduce)
1. Performance of vector element sum using float vs bfloat16 as the storage type.
Sum with different modes (reduce)
1. Performance of sequential execution based vs OpenMP based vector element sum.
2. Performance of memcpy vs in-place based CUDA based vector element sum.
3. Comparing various launch configs for CUDA based vector element sum (memcpy).
4. Comparing various launch configs for CUDA based vector element sum (in-place).
Sum with in-place strategies of CUDA mode (reduce)
1. Comparing various launch configs for CUDA based vector element sum (in-place).
Opendatabay - Open Data Marketplace.pptxOpendatabay
Opendatabay.com unlocks the power of data for everyone. Open Data Marketplace fosters a collaborative hub for data enthusiasts to explore, share, and contribute to a vast collection of datasets.
First ever open hub for data enthusiasts to collaborate and innovate. A platform to explore, share, and contribute to a vast collection of datasets. Through robust quality control and innovative technologies like blockchain verification, opendatabay ensures the authenticity and reliability of datasets, empowering users to make data-driven decisions with confidence. Leverage cutting-edge AI technologies to enhance the data exploration, analysis, and discovery experience.
From intelligent search and recommendations to automated data productisation and quotation, Opendatabay AI-driven features streamline the data workflow. Finding the data you need shouldn't be a complex. Opendatabay simplifies the data acquisition process with an intuitive interface and robust search tools. Effortlessly explore, discover, and access the data you need, allowing you to focus on extracting valuable insights. Opendatabay breaks new ground with a dedicated, AI-generated, synthetic datasets.
Leverage these privacy-preserving datasets for training and testing AI models without compromising sensitive information. Opendatabay prioritizes transparency by providing detailed metadata, provenance information, and usage guidelines for each dataset, ensuring users have a comprehensive understanding of the data they're working with. By leveraging a powerful combination of distributed ledger technology and rigorous third-party audits Opendatabay ensures the authenticity and reliability of every dataset. Security is at the core of Opendatabay. Marketplace implements stringent security measures, including encryption, access controls, and regular vulnerability assessments, to safeguard your data and protect your privacy.
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Empowering the Data Analytics Ecosystem: A Laser Focus on Value
The data analytics ecosystem thrives when every component functions at its peak, unlocking the true potential of data. Here's a laser focus on key areas for an empowered ecosystem:
1. Democratize Access, Not Data:
Granular Access Controls: Provide users with self-service tools tailored to their specific needs, preventing data overload and misuse.
Data Catalogs: Implement robust data catalogs for easy discovery and understanding of available data sources.
2. Foster Collaboration with Clear Roles:
Data Mesh Architecture: Break down data silos by creating a distributed data ownership model with clear ownership and responsibilities.
Collaborative Workspaces: Utilize interactive platforms where data scientists, analysts, and domain experts can work seamlessly together.
3. Leverage Advanced Analytics Strategically:
AI-powered Automation: Automate repetitive tasks like data cleaning and feature engineering, freeing up data talent for higher-level analysis.
Right-Tool Selection: Strategically choose the most effective advanced analytics techniques (e.g., AI, ML) based on specific business problems.
4. Prioritize Data Quality with Automation:
Automated Data Validation: Implement automated data quality checks to identify and rectify errors at the source, minimizing downstream issues.
Data Lineage Tracking: Track the flow of data throughout the ecosystem, ensuring transparency and facilitating root cause analysis for errors.
5. Cultivate a Data-Driven Mindset:
Metrics-Driven Performance Management: Align KPIs and performance metrics with data-driven insights to ensure actionable decision making.
Data Storytelling Workshops: Equip stakeholders with the skills to translate complex data findings into compelling narratives that drive action.
Benefits of a Precise Ecosystem:
Sharpened Focus: Precise access and clear roles ensure everyone works with the most relevant data, maximizing efficiency.
Actionable Insights: Strategic analytics and automated quality checks lead to more reliable and actionable data insights.
Continuous Improvement: Data-driven performance management fosters a culture of learning and continuous improvement.
Sustainable Growth: Empowered by data, organizations can make informed decisions to drive sustainable growth and innovation.
By focusing on these precise actions, organizations can create an empowered data analytics ecosystem that delivers real value by driving data-driven decisions and maximizing the return on their data investment.
Chatty Kathy - UNC Bootcamp Final Project Presentation - Final Version - 5.23...John Andrews
SlideShare Description for "Chatty Kathy - UNC Bootcamp Final Project Presentation"
Title: Chatty Kathy: Enhancing Physical Activity Among Older Adults
Description:
Discover how Chatty Kathy, an innovative project developed at the UNC Bootcamp, aims to tackle the challenge of low physical activity among older adults. Our AI-driven solution uses peer interaction to boost and sustain exercise levels, significantly improving health outcomes. This presentation covers our problem statement, the rationale behind Chatty Kathy, synthetic data and persona creation, model performance metrics, a visual demonstration of the project, and potential future developments. Join us for an insightful Q&A session to explore the potential of this groundbreaking project.
Project Team: Jay Requarth, Jana Avery, John Andrews, Dr. Dick Davis II, Nee Buntoum, Nam Yeongjin & Mat Nicholas
06-04-2024 - NYC Tech Week - Discussion on Vector Databases, Unstructured Data and AI
Discussion on Vector Databases, Unstructured Data and AI
https://www.meetup.com/unstructured-data-meetup-new-york/
This meetup is for people working in unstructured data. Speakers will come present about related topics such as vector databases, LLMs, and managing data at scale. The intended audience of this group includes roles like machine learning engineers, data scientists, data engineers, software engineers, and PMs.This meetup was formerly Milvus Meetup, and is sponsored by Zilliz maintainers of Milvus.
2. File Input and Output Operations:-
File I/O operations are performed using the concept of streams.
A stream means a continuous flow of data.
A stream is a logical container of data that allows us to read from and
write to it.
The stream-based IO operations are faster than normal IO operations
4. Every Java program creates 3 streams automatically.
These streams are attached to the console
1. System.out: standard output stream for console output operations.
2. System.in: standard input stream for console input operations.
3. System.err: standard error stream for console error output operations.
5. Example For Streams
1. System.out.println(“hai");
2. System.err.println(“welcome");
int a=System.in.read(); //returns ASCII code of 1st character
System.out.println((char)a); //will print the charact
6. Java provides two types of streams
• 1.Byte Stream
• 2. Character Stream
8. Java Byte Stream
The java byte stream is defined by two abstract classes
1. InputStream
2. OutputStream.
The InputStream class used for byte stream based input operations,
The OutputStream class used for byte stream based output operations.
The InputStream and OutputStream classes have several classes
to perform various IO operations based on the byte stream.
9.
10. InputStream class
The InputStream class has defined as an abstract class
it has the following methods which have implemented by its concrete classes.
11. OutputStream class
The OutputStream class has defined as an abstract class,
It has the following methods which have implemented by its concrete classes.
12. i) Reading data using BufferedInputStream
BufferedInputStream class to read data from the console.
BufferedInputStream(InputStream inputstream)
BufferedInputStream(InputStream inputstream, int bufSize)
The BufferedInputStream class use a method read( ) to read a
value from the console, or file
16. Character Stream in java
IO stream manages 16-bit Unicode characters, it is called a character stream.
The Unicode set is basically a type of character set where each character
corresponds to a specific numeric value within the given character set.
character stream is defined by two abstract classes, Reader and Writer
17. Reader class used for character stream based input operations
Writer class used for character stream based output operations
Reader and Writer classes have several concreate classes to perform
various IO operations based on the character stream.
18.
19. Reader class
The Reader class has defined as an abstract class
the following methods implemented by its concrete classes
20.
21. Writer class
The Writer class has defined as an abstract class.
It has the following methods implemented by its concrete classes.
22.
23. Reading data using BufferedReader
BufferedReader class to read data from the console.
The BufferedInputStream class needs InputStreamReaderclass.
The BufferedReader use a method read( ) to read a value from the console,
or file, or socket.
24. Example 1 - Reading from console
import java.io.*;
public class ExReading
{
public static void main(String[] args) throws IOException
{
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader in = new BufferedReader(isr);
String name = "";
System.out.print("Please enter your name: ");
name = in.readLine();
System.out.println("Hello, " + name + "!");
25. Example 2 - Reading from a file
import java.io.*;
class ExReading
{
public static void main(String[] args) throws IOException
{
Reader in = new FileReader(“c/abc.txt”);
try
{
char c = (char)input.read();
System.out.println("Data read from a file - '" + c + "'");
}
catch(Exception e) {
System.out.println(e);
}
finally {
input.close();
26. Writing data using FileWriter
import java.io.*;
public class ExWriting
{
public static void main(String[] args) throws IOException
{ Writer out = new FileWriter("C:Desktopcse.txt");
msg = "cse";
try
{
out.write(msg);
System.out.println("Writing done!!!");
}
catch(Exception e)
{ System.out.println(e); }
finally
{ out.close(); }
}} }
27. Writing from a Binary File
DataOutputStream and DataInputStream enable you to write or read primitive data to or from a
stream.
They implement the DataOutput and DataInput interfaces,
DataOutputStream extends FilterOutputStream, which extends OutputStream.
DataOutputStream defines the following constructor:
DataOutputStream(OutputStream outputStream)
DataOutput defines methods
final void writeDouble(double value) throws IOException
final void writeBoolean(boolean value) throws IOException
final void writeInt(int value) throws IOException
28. Reading from a Binary File
DataInputStream is the complement of DataOuputStream. It extends FilterInputStream,which
extends InputStream, and it implements the DataInput interface.
DataInputStream(InputStream inputStream)
Methods:
double readDouble( ) throws IOException
boolean readBoolean( ) throws IOException
int readInt( ) throws IOException
29. File Class
File is a built-in class in Java.
File class has been defined in the java.io package.
The File class represents a reference to a file or directory.
File class has various methods to perform operations like creating a file or directory,
reading from a file, updating file content, and deleting a file or directory.
31. File class Methods
1. boolean canExecute() : Tests whether the application can execute the file denoted by this
abstract pathname.
2. boolean canRead() : Tests whether the application can read the file denoted by this abstract
pathname.
3. boolean canWrite() : Tests whether the application can modify the file denoted by this abstract
pathname.
4. int compareTo(File pathname) : Compares two abstract pathnames lexicographically.
5. boolean createNewFile() : Atomically creates a new, empty file named by this abstract pathname
.
6. static File createTempFile(String prefix, String suffix) : Creates an empty file in the default
temporary-file directory.
32. 8) boolean exists() : Tests whether the file or directory denoted by this abstract pathname exists.
9) String getAbsolutePath() : Returns the absolute pathname string of this abstract pathname.
10) long getFreeSpace() : Returns the number of unallocated bytes in the partition .
11) String getName() : Returns the name of the file or directory denoted by this abstract pathname.
12) String getParent() : Returns the pathname string of this abstract pathname’s parent.
13) File getParentFile() : Returns the abstract pathname of this abstract pathname’s parent.
14) String getPath() : Converts this abstract pathname into a pathname string.
15) boolean isDirectory() : Tests whether the file denoted by this pathname is a directory.
33. File
import java.io.File;
class FileDemo {
static void p(String s) {
System.out.println(s);
}
public static void main(String args[]) {
File f1 = new File("/java/COPYRIGHT");
p("File Name: " + f1.getName());
p("Path: " + f1.getPath());
p("Abs Path: " + f1.getAbsolutePath());
p("Parent: " + f1.getParent());
p(f1.exists() ? "exists" : "does not exist");
p(f1.canWrite() ? "is writeable" : "is not writeable");
p(f1.canRead() ? "is readable" : "is not readable");
p("is " + (f1.isDirectory() ? "" : "not" + " a directory"));
p(f1.isFile() ? "is normal file" : "might be a named pipe");
p(f1.isAbsolute() ? "is absolute" : "is not absolute");
p("File last modified: " + f1.lastModified());
p("File size: " + f1.length() + " Bytes");
}
}
34. File
Output
File Name: COPYRIGHT
Path: /java/COPYRIGHT
Abs Path: /java/COPYRIGHT
Parent: /java
exists
is writeable
is readable
is not a directory
is normal file
is absolute
File last modified: 812465204000
File size: 695 Bytes
35. Creating File using File class
import java.io.*;
class ExFile
{
public static void main(String[] args)
{
try {
File file = new File(“c/abc.txt");
if (file.createNewFile())
{
System.out.println("New File is created!");
} else
{
System.out.println("File already exists.");
}
} catch (IOException e)
{
e.printStackTrace();
}
}
36. List out all files in a directory or path
import java.io.*;
class ExFileList
{
public static void main(String[] args)
{
File f=new File(“c:/abc/cse");
String filenames[]=f.list();
for(String filename:filenames)
{
System.out.println(filename);
}
}
}