Java Example - Interrupting a Thread
The following example demonstrates how to use the interrupt() method to interrupt a thread and the isInterrupted() method to check if the thread has been interrupted:
Main.java File
public class Main extends Object
implements Runnable {
public void run() {
try {
System.out.println("in run() - About to work2() method");
work2();
System.out.println("in run() - Returned from work2() method");
}
catch (InterruptedException x) {
System.out.println("in run() - Interrupted in work2() method");
return;
}
System.out.println("in run() - After sleeping");
System.out.println("in run() - Exiting normally");
}
public void work2() throws InterruptedException {
while (true) {
if (Thread.currentThread().isInterrupted()) {
System.out.println("C isInterrupted()=" + Thread.currentThread().isInterrupted());
Thread.sleep(2000);
System.out.println("D isInterrupted()=" + Thread.currentThread().isInterrupted());
}
}
}
public void work() throws InterruptedException {
while (true) {
for (int i = 0; i < 100000; i++) {
int j = i * 2;
}
System.out.println("A isInterrupted()=" + Thread.currentThread().isInterrupted());
if (Thread.interrupted()) {
System.out.println("B isInterrupted()=" + Thread.currentThread().isInterrupted());
throw new InterruptedException();
}
}
}
public static void main(String[] args) {
Main si = new Main();
Thread t = new Thread(si);
t.start();
try {
Thread.sleep(2000);
}
catch (InterruptedException x) {
}
System.out.println("in main() - Interrupting other thread");
t.interrupt();
System.out.println("in main() - Exiting");
}
}
The output of the above code is:
in run() - About to work2() method
in main() - Interrupting other thread
in main() - Exiting
C isInterrupted()=true
in run() - Interrupted in work2() method