Hi Anshuman,
The main thread is not always the last thread to die. If you run the code below you will see the last print statement in main is printed before the last thread dies.
public class ThreadTester {
public static void main(
String args[] )
{
PrintThread thread1, thread2, thread3, thread4;
thread1 = new PrintThread( "thread1" );
thread2 = new PrintThread( "thread2" );
thread3 = new PrintThread( "thread3" );
thread4 = new PrintThread( "thread4" );
System.err.println( "\nStarting threads" );
thread1.start();
thread2.start();
thread3.start();
thread4.start();
System.err.println( "Threads started\n" );
}
}
class PrintThread extends Thread {
private int sleepTime;
// PrintThread constructor assigns name to thread
// by calling Thread constructor
public PrintThread( String name )
{
super( name );
// sleep between 0 and 5 seconds
sleepTime = (int) ( Math.random() * 5000 );
System.err.println( "Name: " + getName() +
"; sleep: " + sleepTime );
}
// execute the thread
public void run()
{
// put thread to sleep for a random interval
try {
System.err.println( getName() + " going to sleep" );
Thread.sleep( sleepTime );
}
catch ( InterruptedException exception ) {
System.err.println( exception.toString() );
}
// print thread name
System.err.println( getName() + " done sleeping" );
}
}
