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What will happen after compiling and running following code?
class A implements Runnable{ public void run(){ System.out.println("run-a"); }}public class Test{ public static void main(String... args){ A a = new A(); Thread t = new Thread(a); t.start(); t.start(); }}

What will happen after compiling and running following code?

class A implements Runnable{ public void run(){ System.out.println("run-a"); }}public class Test{ public static void main(String... args){ A a = new A(); Thread t = new Thread(a); t.start(); t.start(); }}
Correct Answer Compilation succeed but Runtime Exception

Once a thread has been started, it can never be started again. 2nd time t.start() throws java.lang.IllegalThreadStateException.

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