Understanding Concurrency and Threads in Java Programming, Slides of Data Structures and Algorithms

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Concurrency

Concurrency is the process of working on multipletasks at the same time.

Operating Systems supports concurrency heavily.

It is allowing computers to use resources moreeffectively.

Threads

A Thread is a program unit or process that is executedindependently of other processes

Thread can be considered a “light-weight” process.

Threads help carry out two or more tasks at the sametime

Java virtual machine executes all threads in “parallel”

Threads

Threads exists within a process

Each process has at least one thread

Each process has its own private run-time resources

Multiple threads within a process can share resourceswithin the process

Runnable Interface

public interface Runnable {

void run();

} public class MyClass implements Runnable{

public void run(){

// thread action

Sleeping Threads

Thread.sleep(time in miliseconds)

A great way to pause the current thread

Read more at

http://java.sun.com/docs/books/tutorial/essential/concurrency/index.html