JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Java Thread By Extending Thread Class

  • A thread can be created in java by extending Thread class, where you must override run() method.
  • Call start() method to start executing the thread object.

Thread Sample Code

Code:
package com.myjava.threads;

class MySmpThread extends Thread{
    public static int myCount = 0;
    public void run(){
        while(MySmpThread.myCount <= 10){
            try{
                System.out.println("Expl Thread: "+(++MySmpThread.myCount));
                Thread.sleep(100);
            } catch (InterruptedException iex) {
                System.out.println("Exception in thread: "+iex.getMessage());
            }
        }
    }
}
public class RunThread {
    public static void main(String a[]){
        System.out.println("Starting Main Thread...");
        MySmpThread mst = new MySmpThread();
        mst.start();
        while(MySmpThread.myCount <= 10){
            try{
                System.out.println("Main Thread: "+(++MySmpThread.myCount));
                Thread.sleep(100);
            } catch (InterruptedException iex){
                System.out.println("Exception in main thread: "+iex.getMessage());
            }
        }
        System.out.println("End of Main Thread...");
    }
}

Example Output

Starting Main Thread...
Main Thread: 1
Expl Thread: 2
Expl Thread: 3
Main Thread: 4
Expl Thread: 5
Main Thread: 5
Expl Thread: 6
Main Thread: 7
Main Thread: 8
Expl Thread: 9
Expl Thread: 11
Main Thread: 10
End of Main Thread...

Other Thread Examples

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Knowledge Centre
What is wrapper class?
Everything in java is an object, except primitives. Primitives are int, short, long, boolean, etc. Since they are not objects, they cannot return as objects, and collection of objects. To support this, java provides wrapper classes to move primitives to objects. Some of the wrapper classes are Integer, Long, Boolean, etc.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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