testtest.java

这是我做的一个java游戏

import java.awt.*;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;

import javax.swing.*;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;

public class TestTest 
{
	public static void main(String[] args)
	   {  
	      TextTestFrame frame = new TextTestFrame();
	      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	      frame.show();
	   }
}

class TextTestFrame extends JFrame
{  
   public TextTestFrame()
   {  
      setTitle("TextTest");
      setSize(300,300);

      Container contentPane = getContentPane();
      JPanel panel=new JPanel();
      DocumentListener listener=new ClockListener();
      hourField=new JTextField("12",3);
      hourField.getDocument().addDocumentListener(listener);
      panel.add(hourField);
      minuteField=new JTextField("00",3);
      minuteField.getDocument().addDocumentListener(listener);
      panel.add(minuteField);
      contentPane.add(panel,BorderLayout.SOUTH);
      clock=new ClockPanel();
      contentPane.add(clock,BorderLayout.CENTER);
      
   }
   private class ClockListener implements DocumentListener
   {

	public void changedUpdate(DocumentEvent arg0) {
		// TODO Auto-generated method stub
		
	}

	public void insertUpdate(DocumentEvent arg0) {
		// TODO Auto-generated method stub
		setClock();
	}

	public void removeUpdate(DocumentEvent arg0) {
		// TODO Auto-generated method stub
		setClock();
	}
	   
   }
   private void setClock()
   {
	   int hour=Integer.parseInt(hourField.getText().trim());
	   int minute=Integer.parseInt(minuteField.getText().trim());
	   clock.setTime(hour,minute);
   }
   private JTextField hourField;
   private JTextField minuteField;
   private ClockPanel clock;
}

class ClockPanel extends JPanel
{
   public void paintComponent(Graphics g)
   {
      // draw the circular boundary

      super.paintComponent(g); 
      Graphics2D g2 = (Graphics2D)g;
      Ellipse2D circle 
         = new Ellipse2D.Double(0, 0, 2 * RADIUS, 2 * RADIUS);
      g2.draw(circle);
      
      // draw the hour hand

      double hourAngle 
         = Math.toRadians(90 - 360 * minutes / (12 * 60));
      drawHand(g2, hourAngle, HOUR_HAND_LENGTH);

      // draw the minute hand

      double minuteAngle 
         = Math.toRadians(90 - 360 * minutes / 60);
      drawHand(g2, minuteAngle, MINUTE_HAND_LENGTH);
   }

   public void drawHand(Graphics2D g2, 
      double angle, double handLength)
   {
      Point2D end = new Point2D.Double(
         RADIUS + handLength * Math.cos(angle), 
         RADIUS - handLength * Math.sin(angle));
      Point2D center = new Point2D.Double(RADIUS, RADIUS);
      g2.draw(new Line2D.Double(center, end));
   }
   
   /**
      Set the time to be displayed on the clock
      @param h hours
      @param m minutes
   */
   public void setTime(int h, int m)
   {  
      minutes = h * 60 + m;
      repaint();
   }
   
   private double minutes = 0;
   private double RADIUS = 100;
   private double MINUTE_HAND_LENGTH = 0.8 * RADIUS;
   private double HOUR_HAND_LENGTH = 0.6 * RADIUS;
}