Java实现滚动字幕

Java实现滚动字幕

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import java.util.Calendar;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Timer;

public class Demo extends JFrame
{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	public Demo()
	{

		Font font1 = new Font("幼圆", Font.BOLD, 16);
		Calendar cal = Calendar.getInstance();
		SimpleDateFormat formatter = new SimpleDateFormat("EEEE,MMMMdd日，yyyy年 HH:mm:ss");
		String mDateTime = formatter.format(cal.getTime());

		MovingMessagePanel messagePanel = new MovingMessagePanel(mDateTime);
		messagePanel.setFont(font1);
		messagePanel.setBackground(Color.BLACK);
		messagePanel.setForeground(Color.PINK);

		add(messagePanel);

	}

	public static void main(String[] args)
	{

		Demo frame = new Demo();
		JLabel label = new JLabel("开始调试时间：X月X日     结束调试时间：X月X日");
		label.setBackground(Color.black);
		frame.setTitle("走马灯");
		frame.setLocationRelativeTo(null);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(320, 120);
		frame.setVisible(true);
		frame.add(label, BorderLayout.SOUTH);
	}

	static class MovingMessagePanel extends JPanel
	{

		/**
		 * 
		 */
		private static final long serialVersionUID = 1L;
		private String message = " ";
		private int xCoordinate = 0;
		private int yCoordinate = 40;
		
		public MovingMessagePanel(String message)
		{
			this.message = message;
			Timer timer = new Timer(100, new TimerListener());
			timer.start();
		}

		public void paintComponent(Graphics g)
		{
			super.paintComponent(g);

			if (xCoordinate > getWidth())
			{
				xCoordinate = -100;
			}

			xCoordinate += 5;
			g.drawString(message, xCoordinate, yCoordinate);
		}

		class TimerListener implements ActionListener
		{

			public void actionPerformed(ActionEvent e)
			{
				repaint();
			}
		}
	}
}