这是使用的示例
javax.swing.Timer。
import java.awt.EventQueue;import java.awt.Font;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.Jframe;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.Timer;public class MarqueeTest { private void display() { Jframe f = new Jframe("MarqueeTest"); f.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); String s = "Tomorrow, and tomorrow, and tomorrow, " + "creeps in this petty pace from day to day, " + "to the last syllable of recorded time; ... " + "It is a tale told by an idiot, full of " + "sound and fury signifying nothing."; MarqueePanel mp = new MarqueePanel(s, 32); f.add(mp); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); mp.start(); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new MarqueeTest().display(); } }); }}class MarqueePanel extends JPanel implements ActionListener { private static final int RATE = 12; private final Timer timer = new Timer(1000 / RATE, this); private final JLabel label = new JLabel(); private final String s; private final int n; private int index; public MarqueePanel(String s, int n) { if (s == null || n < 1) { throw new IllegalArgumentException("Null string or n < 1"); } StringBuilder sb = new StringBuilder(n); for (int i = 0; i < n; i++) { sb.append(' '); } this.s = sb + s + sb; this.n = n; label.setFont(new Font("Serif", Font.ITALIC, 36)); label.setText(sb.toString()); this.add(label); } public void start() { timer.start(); } public void stop() { timer.stop(); } @Override public void actionPerformed(ActionEvent e) { index++; if (index > s.length() - n) { index = 0; } label.setText(s.substring(index, index + n)); }}
