import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
 * Java中用線程實現(xiàn)帶有滾動效果的Label標簽
 */
public class Test extends JFrame {
 private static final long serialVersionUID = -2397593626990759111L;
 private JPanel pane = null;
 private MoveLabel label = null;
 public Test() {
 super("Test");
 pane = new JPanel();
 label = new MoveLabel("帶有滾動效果的標簽");
 pane.add(label);
 this.getContentPane().add(pane);
 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 this.setSize(300, 200);
 this.setVisible(true);
 }
 public static void main(String args[]) {
 new Test();
 }
 /**
 * 帶有滾動效果的Label標簽，可繼續(xù)拓展很多特效，例如顏色變換、速度變換等
 */
 private class MoveLabel extends JLabel implements Runnable {
 private static final long serialVersionUID = 1891684760189602720L;
 private String text = null;
 private Thread thread = null;
 private int x = 0;
 private int w = 0, h = 0;
 public MoveLabel(String text) {
  super(text);
  this.text = text;
  thread = new Thread(this);
  thread.start();
 }
 public String getText() {
  return text;
 }
 public void setText(String text) {
  super.setText(text);
  this.text = text;
 }
 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 - 2);
 }
 public void run() {
  while (true) {
  x -= 2;
  if (x < -w) {
   x = w;
  }
  this.repaint();
  try {
   Thread.sleep(50);
  } catch (InterruptedException e) {
   e.printStackTrace();
  }
  }
 }
 }
}