What Are Processes and Threads?

This section describes processes of multi-tasking operating systems and threads of multi-threading applications. Java is a programming language that allows you write multi-threading applications.

What is a thread? What is a process? Answers are in the following explanations:

There are 3 levels of executions of computer instructions on a computer system:

A good example of multi-threading programs are computer games that simulate real time activities of multiple human characters and/or moving objects.

Under the Java architecture, the Java virtual machine (JVM) will provide all the help you need to create and manage multiple threads in your Java applications. Read subsequent sections for tutorial examples.

Last update: 2014.

Table of Contents

 About This Book

 Installing JDK 1.8 on Windows

 Execution Process, Entry Point, Input and Output

 Primitive Data Types and Literals

 Bits, Bytes, Bitwise and Shift Operations

 Managing Bit Strings in Byte Arrays

 Reference Data Types and Variables

 StringBuffer - The String Buffer Class

 System Properties and Runtime Object Methods

 Generic Classes and Parameterized Types

 Generic Methods and Type Inference

 Lambda Expressions and Method References

Execution Threads and Multi-Threading Java Programs

What Are Processes and Threads?

 The "Thread" Class - Creating Thread Objects With Thread Sub Classes

 The "Runnable" Interface - Creating Thread Objects with Runnable Objects

 CPU Execution Time Shared by Multiple Threads

 CPU Execution Time Shared by Multiple Threads - Test Output

 Application Data Shared by Multiple Threads

 Application Data Shared by Multiple Threads - Test Results

 interrupt() - Method to Terminate Thread

 ThreadGroup Class and "system" ThreadGroup Tree

 Synchronization Technique and Synchronized Code Blocks

 Deadlock Condition Example Programs

 Garbage Collection and the gc() Method

 Outdated Tutorials

 References

 PDF Printing Version