学习java gui 的侦听器部分遇到小问题,求朋友帮忙解答,谢谢

Question

我把for循环部分直接放在go()方法内执行动画是可以移动的,但是我把for循环放到侦听器ActionListener()内动画就直接略过过程,点击按钮就只会卡一下跳到最后的坐标.

请问一下这个是什么原因,怎么解决呢

package gui;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class SimpleAnimation {
	JFrame frame;
	JButton button;
	MyDrawPanel1 drawPanel1;
	int x=70;
	int y=70;
	public static void main (String[] args) {
		SimpleAnimation gui=new SimpleAnimation();
		gui.go();
	}

	public void go() {
		frame= new JFrame();
		button=new JButton("Start");
		drawPanel1=new MyDrawPanel1();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.getContentPane().add(BorderLayout.CENTER, drawPanel1);
		frame.getContentPane().add(BorderLayout.SOUTH,button);
		frame.setSize(400,400);
		myEvent();
		frame.setVisible(true);
		
		/*这一段有问题...
		for(int i=0;i<130;i++) {       
			x++;
			y++;
			drawPanel1.repaint();
			
			try {
				Thread.sleep(50);
			}catch(Exception ex) {}
		}*/
		
	}
	
	public void myEvent() {
		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent event) {
				for(int i=0;i<130;i++) {
					x++;
					y++;
					drawPanel1.repaint();
					System.out.println("正在执行...");
					try {
						Thread.sleep(50);
					}catch(Exception ex) {}
				}
			} 		
		});
	}
	
	class MyDrawPanel1 extends JPanel{
		
		private static final long serialVersionUID = 1L;

		public void paintComponent (Graphics g) {
			g.setColor(Color.green);
			g.fillOval(x, y, 40, 40);
		}
	}
}

Answer 1

按钮点击事件如果没完成，整个窗口属于阻塞状态。所以如果点击后要处理的操作需要长时间完成，建议用线程封装。    public void myEvent() {         button.addActionListener(new ActionListener() {             public void actionPerformed(ActionEvent event) {                 new Thread(){                 public void run(){                 for(int i=0;i<130;i++) {                     x++;                     y++;                     drawPanel1.repaint();                     System.out.println("正在执行...");                     try {                         Thread.sleep(50);                     }catch(Exception ex) {}                 }                 }                 }.start();             }              });     }