Simple thread implementation in Java ...

[deathvirus_me]

Well , i hope ur aware of the tern "Threads" , and "Threading" . if so , then carry on . if not then refer to

http://java.sun.com/docs/books/tutorial ... ncurrency/

Here is a simple program to implement the trick :

class thread1 extends Thread{
	public void run(){
		for(int i=0;i<10;i++)
			System.out.println("From Thread 1 -->> "+i);
	}
}
class thread2 extends Thread{
	public void run(){
		for(int i=0;i<10;i++)
			System.out.println("From Thread 2 -->> "+i);
	}
}
class threads{
	public static void main(String args[]){
		thread1 th1=new thread1();
		thread2 th2=new thread2();
		th1.start();th2.start();
	}
}

Run the above code more than twice to see the output . u should get a different output almost everytime . increase the no. of threads to get even more varied output .

And . for a practical implementation . here u go . a search program using threads :

import java.io.*;

class threads extends Thread{
    int n;
    threads (int n) {
        this.n = n;
    }
    public void run(){
        if(mainclass.find==n)
			mainclass.position=mainclass.index+1;
		mainclass.index++;
	}
}
class mainclass{
	static int arr[]=new int[200];
	static int find=0,index=0,position=-1,total=0;

	public static void main(String args[])throws IOException{
		DataInputStream di=new DataInputStream(System.in);
		System.out.print("Enter total number of elements : ");
		mainclass.total=Integer.parseInt(di.readLine());
		threads a[]=new threads[mainclass.total];
		for(int i=0;i<mainclass.total;i++){
			System.out.print("Enter element "+(i+1)+" : ");
            a[i]=new threads(new Integer(di.readLine()).intValue());
		}
		System.out.print("Enter element to search : ");
		mainclass.find=new Integer(di.readLine()).intValue();
		for(int i=0;i<a.length;i++)
			a[i].start();
		label :
		while(mainclass.index<mainclass.total && mainclass.position<0)
			continue label;
		if(mainclass.position<0)
			System.out.println("Element not present.");
		else
			System.out.println("Element present at "+(position));
	}
}

[vvnraman]

Its a good practice to include the join statements at the end of the lines so that the main thread doesn't ends before the clild threads.
For the program displayed here it should be like

class threads{
public static void main(String args[]){
thread1 th1=new thread1();
thread2 th2=new thread2();
th1.start();th2.start();
th1.join();
th2.join();

}
}