How are Anonymous inner classes used in Java?

Question

What is the use of anonymous classes in Java? Can we say that usage of anonymous class is one of the advantages of Java?

Answer 1

new Thread() {
        public void run() {
            try {
                Thread.sleep(300);
            } catch (InterruptedException e) {
                System.out.println("Exception message: " + e.getMessage());
                System.out.println("Exception cause: " + e.getCause());
            }
        }
    }.start();

This is also one of the example for anonymous inner type using thread