JAVA的SWING组件 动画问题 .

Question

*

• */ package test.Tweleve;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

/**

• @author Administrator
  *
  */
  public class MoveHa {
  static long i = 0;
  // final static long start = System.currentTimeMillis();
  public static void main(String[] args) {
  JFrame frame = new JFrame("guluguluha");
  MoveP d = new MoveP();
  JButton Button = new JButton("再来一遍");
  frame.getContentPane().add(BorderLayout.NORTH, Button);
  frame.setSize(600, 600);
  frame.setVisible(true);
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.getContentPane().add(d);
  Button.addActionListener(new ActionListener() {

      @Override
      public void actionPerformed(ActionEvent e) {
          // TODO Auto-generated method stub
          i = 0;
          frame.repaint();
          long start = System.currentTimeMillis();
          while (MoveHa.i <= 200) {
               MoveHa.i = (System.currentTimeMillis()-start)/1000;
               frame.repaint();
      }          //这部分有问题。。按钮按下去     按钮一直处于被按状态。也没动画效果 直到程序完，才解除被按状态
      }          //监听器是不是无法运行动画。
  });
  long start = System.currentTimeMillis();
  while (i <= 200) {
       i = (System.currentTimeMillis()-start)/10;
       frame.repaint();
  }
  

  }
  }

class MoveP extends JPanel {

private static final long serialVersionUID = 1L;

public void paintComponent(Graphics g) {
    if(MoveHa.i <= 200) {
    g.setColor(Color.red);
    g.fillOval(20 + 1*(int)(MoveHa.i), 50 + 1*(int)(MoveHa.i), 100, 100);
    }
}

}