如何做一个加载的条啊？

Question

有时候数据太多了。想做一个小面板，上面一个进度条，数据加载中
加载完了关闭。不知道怎么实现啊~~

Answer 1

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JProgressBar;public class TestMain extends JFrame {
    private JButton button = null;
    private ProgressDialog dialog = null;
    
    public TestMain(){
        super("Test");
        button = new JButton("Start");
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                dialog = new ProgressDialog();
            }
        });
        this.getContentPane().setLayout(new FlowLayout());
        this.getContentPane().add(button);
        this.setSize(300, 200);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
    
    public static void main(String [] args){
        new TestMain();
    }
    
    class ProgressDialog extends JDialog implements Runnable {
        private JProgressBar pb = null;
        private Thread thread = null;
        public ProgressDialog(){
            super(TestMain.this, "Loading...", true);
            thread = new Thread(this);
            pb = new JProgressBar();
            pb.setMaximum(100);
            this.getContentPane().setLayout(new FlowLayout());
            this.getContentPane().add(pb);
            this.setSize(200, 65);
            this.setLocationRelativeTo(TestMain.this);
            thread.start();
            this.setVisible(true);
        }
        public void run(){
            pb.setValue(0);
            for(int i = 0; i < 100; i++){
                pb.setValue(i + 1);
                System.out.println(i);
                try {
                    Thread.sleep(20);
                } catch (InterruptedException ex) {
                    ex.printStackTrace();
                }
            }
        }
    }
    
}