时钟源代码

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class Clock extends JPanel implements Runnable {
  Thread thread = null;

  SimpleDateFormat formatter = new SimpleDateFormat("s", Locale.getDefault());

  Date currentDate;

  int xcenter = 100, ycenter = 100, lastxs = 0, lastys = 0, lastxm = 0, lastym = 0, lastxh = 0,
      lastyh = 0;

  private void drawStructure(Graphics g) {
    g.setFont(new Font("TimesRoman", Font.PLAIN, 14));
    g.setColor(Color.blue);
    g.drawOval(xcenter - 50, ycenter - 50, 100, 100);
    g.setColor(Color.darkGray);
    g.drawString("9", xcenter - 45, ycenter + 3);
    g.drawString("3", xcenter + 40, ycenter + 3);
    g.drawString("12", xcenter - 5, ycenter - 37);