source code to demonstrate join method

package thread;

class MyThr extends Thread
    {
    public void run()
    {
    for(int i=0;i<3;i++)
    {
    System.out.println("child thread");
    try
    {
    Thread.sleep(1000);
    }
    catch(InterruptedException e){}
    }
    }
    
    }
public    class ThreadDem
    {
    public static void main(String a[])throws Exception
    {
        MyThr t=new MyThr();
        t.start();
        t.join(); //or t.join(3000);
        for(int i=0;i<2;i++);
        {
        System.out.println("main thread");
        }

    }
    }

output:
child thread
child thread
child thread
main thread
main thread