Question

I am using the following codes, to replace a JLabel each 0.5 seconds, with the same sentence but with another dot.

    Runnable r1=new Runnable() {
        @Override
        public void run() {
            while(true){
                try {
                    connectionStatus.setText("Connection Established...");
                    Thread.sleep(500L);
                    connectionStatus.setText("Connection Established.");
                    Thread.sleep(500L);
                    connectionStatus.setText("Connection Established..");
                    Thread.sleep(500L);
                } catch (InterruptedException ex) {

                }
            }
        }
    };
Thread th1=new Thread(r1);
th1.start();

Is this the real purpose from using threads? Does this affect the speed of the program? If the thing that I’m doing is so stupid, is there any other way to do such stupid things?

Answer 1

Is this the real purpose from using threads?

If you want these operations to run in parallel then the answer is yes

is there any other way to do such stupid things?

If you update your label at a fixed intervals then you should probably go for using Timers instead

On a side note:

• You should avoid using while(true) when doing multithreading, you should either define a stop boolean that you test in the loop or use Thread.interrupted() if you extend the Thread class
• When updating UI elements from non EDT thread, you should use SwingUtilities.invokeLater