线程的加入

public class JoinTest extends JFrame {

    private Thread threadA;
    private Thread threadB;
    final JProgressBar progressBar = new JProgressBar();
    final JProgressBar progressBar2 = new JProgressBar();
    int count = 0;

    public JoinTest() {
        // TODO Auto-generated constructor stub
        getContentPane().add(progressBar, BorderLayout.NORTH);
        getContentPane().add(progressBar2, BorderLayout.SOUTH);
        progressBar.setStringPainted(true);
        progressBar2.setStringPainted(true);

        threadA = new Thread(new Runnable() {
            int count = 0;

            public void run() {
                while (true) {
                    progressBar.setValue(++count);
                    try {
                        Thread.sleep(100);
                        threadB.join();
                    } catch (Exception e) {
                        // TODO: handle exception
                        e.printStackTrace();
                    }
                }
            }
        });
        threadA.start();
        threadB = new Thread(new Runnable() {
            int count = 0;
            public void run() {
                while (true) {
                    progressBar2.setValue(++count);
                    try {
                        Thread.sleep(100);
                    } catch (Exception e) {
                        // TODO: handle exception
                        e.printStackTrace();
                    }
                    if(count==100)
                        break;
                }
            }
        });
        threadB.start();
    }
    public static void init(JFrame frame,int width,int height) {
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(width, height);
        frame.setVisible(true);
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        init(new JoinTest(), 100, 100);
    }

}