SWING实现滚动字幕

package com.lyz;

 

import java.awt.Color;

import java.awt.Component;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.GraphicsEnvironment;

import java.awt.event.ComponentListener;

import java.beans.PropertyChangeListener;

 

import javax.swing.JFrame;

import javax.swing.JPanel;

 

 

public class Test extends JFrame {

 

         public Test() {

                  

                   super("Test",GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration());

                   MoveLabel label = new MoveLabel("带有滚动效果的标签");

                   this.add(label);

 

                   Test.removeListener(this);

                  

                   this.setIgnoreRepaint(false);

                   this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                   this.setSize(600, 300);

                   this.setVisible(true);

         }

        

         public static void main(String args[]) {

                  

                   new Test();

//               System.getProperties().list(System.out);

         }

        

         public static void removeListener(Component component){

                   ComponentListener[] componentListener = component.getComponentListeners();

                   for(int i = 0; i < componentListener.length;i++){

                            component.removeComponentListener(componentListener[i]);

                   }

                  

                   PropertyChangeListener[] changeListener = component.getPropertyChangeListeners();

                   for(int i = 0; i < changeListener.length;i++){

                            component.removePropertyChangeListener(changeListener[i]);

                   }

         }

 

         /**

          * 带有滚动效果的Label标签

          */

         private class MoveLabel extends JPanel implements Runnable{

 

                   private String text = null;

 

                   private Thread thread = null;

 

                   private int x = 0;

 

                   private int w = 0, h = 0;

 

                   public MoveLabel(String text) {

                            super();

                            this.text = text;

                            this.setBackground(Color.BLACK);

                            this.setFont(new Font("宋体", Font.PLAIN, 300));

                            this.setForeground(Color.red);

                            this.setIgnoreRepaint(false);

                           

                            Test.removeListener(this);

                            thread = new Thread(this);

                            thread.start();

                   }

                  

                     public void update(Graphics g) {

                                paint(g);

                     }

                    

                   /*

                    * 绘制

                    */

                   protected void paintComponent(Graphics g) {

                           

                            super.paintComponent(g);

                            g.setColor(this.getBackground());

                            g.fillRect(0, 0, w = this.getWidth(), h = this.getHeight());

                            g.setColor(this.getForeground());

                            g.setFont(this.getFont());

                            g.drawString(text, x, h - 1);

                   }

 

                   public void run() {

                            while (true) {

                                     x -= 1;

                                     if (x < -w) {

                                               x = w;

                                     }

                                     this.repaint();

                                     try {

                                               Thread.sleep(16);//间隔绘制16毫秒

                                     } catch (InterruptedException e) {

                                               e.printStackTrace();

                                     }

                            }

                   }

         }

 

 

 

}