cannonworld.java

一些JAVA的小程序

      //mdm April 2001

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;


public class CannonWorld extends JFrame{

  public static void main (String [] args){
    CannonWorld world = new CannonWorld();
  }

  private CannonGamePanel panel = new CannonGamePanel(new Integer(45));
  private JScrollBar slider = new JScrollBar(JScrollBar.VERTICAL, 45,5,0, 90);

  public CannonWorld() {	//constructor for new window
    //resize frame, initialize title
    addWindowListener(new CloseQuit());
    getContentPane().add(panel);
    //add graphical objects and their listeners
    JButton fire = new JButton("fire");
    fire.addActionListener(new FireButtonListener());
    getContentPane().add("North", fire);
    slider.addAdjustmentListener(new JScrollBarListener());
    getContentPane().add("East", slider);
    setSize(CannonGamePanel.PanelWidth, CannonGamePanel.PanelHeight+60);
    setTitle("Cannon World");
    show();
    while (true) panel.run();
  }

  private class FireButtonListener implements ActionListener{
    public void actionPerformed(ActionEvent evt){
      panel.fire();
    }
  }

  private class JScrollBarListener implements AdjustmentListener{
    public void adjustmentValueChanged(AdjustmentEvent e){
      int angle = slider.getValue();
      panel.setAngle(angle);
    }
  }
}