No, we cannot restart the thread, as once a thread started and executed, it goes to the Dead state. Therefore, if we try to start a thread twice, it will give a runtimeException "java.lang.IllegalThreadStateException". Consider the following example.
public class Multithread1 extends Thread
{
public void run()
{
try {
System.out.println("thread is executing now........");
} catch(Exception e) {
}
}
public static void main (String[] args) {
Multithread1 m1= new Multithread1();
m1.start();
m1.start();
}
}​
Output :
thread is executing now........
Exception in thread "main" java.lang.IllegalThreadStateException
at java.lang.Thread.start(Thread.java:708)
at Multithread1.main(Multithread1.java:13)
