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What is the output of this program?


class newthread extends Thread {
Thread t;
String name;
newthread(String threadname) {
name = threadname;
t = new Thread(this,name);
t.start();
}
public void run() {
}
}
class multithreaded_programing {
public static void main(String args[]) {
newthread obj1 = new newthread("one");
newthread obj2 = new newthread("two");
try {
obj1.t.wait();
System.out.print(obj1.t.isAlive());
}
catch(Exception e) {
System.out.print("Main thread interrupted");
}
}
}
Options:
A .  true
B .  false
C .  Main thread interrupted
D .  None of the mentioned
Answer: Option C

obj1.t.wait() causes main thread to go out of processing in sleep state hence causes 

exception and "Main thread interrupted" is printed.
Output:
$ javac multithreaded_programing.java
$ java multithreaded_programing
Main thread interrupted



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