Stop thread using own flag and interrupt method

Here is the sample code that explains how to stop thread using own flag and interrupt method respectively.

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public class Main {       static interface IClosableThread {         void start();           void close();     }       static class StopThreadUsingFlag extends Thread implements IClosableThread {         private boolean stopThis = false;           public void run() {             try {                 while (this.stopThis == false) {                     System.out.print(".");                     Thread.sleep(500);                 }             } catch (InterruptedException e) {             }               System.out.println();             System.out.println("Finished!");         }           public void close() {             this.stopThis = true;               try {                 this.join();             } catch (InterruptedException e) {                 e.printStackTrace();             }         }     }       static class StopThreadUsingInterrupt extends Thread implements             IClosableThread {         public void run() {             try {                 while (!this.isInterrupted()) {                     System.out.print(".");                     Thread.sleep(500);                 }             } catch (InterruptedException e) {             }               System.out.println();             System.out.println("Finished!");         }           public void close() {             this.interrupt();               try {                 this.join();             } catch (InterruptedException e) {                 e.printStackTrace();             }         }     }       public static void main(String[] args) {         System.out.println("Hello, Java!");           IClosableThread thread = new Main.StopThreadUsingFlag();         thread.start();         try {             Thread.sleep(3000);         } catch (InterruptedException e) {             e.printStackTrace();         }         thread.close();           thread = new Main.StopThreadUsingInterrupt();         thread.start();         try {             Thread.sleep(3000);         } catch (InterruptedException e) {             e.printStackTrace();         }         thread.close();       } }