?? key.java
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package untitled2;import java.awt.*;import java.awt.event.*;import java.applet.*;public class key extends Applet { int x = 150,y = 150; boolean isStandalone = false; BorderLayout borderLayout1 = new BorderLayout(); Panel panel1 = new Panel(); /**Get a parameter value*/ public String getParameter(String key, String def) { return isStandalone ? System.getProperty(key, def) : (getParameter(key) != null ? getParameter(key) : def); } /**Construct the applet*/ public key() { } /**Initialize the applet*/ public void init() { try { jbInit(); } catch(Exception e) { e.printStackTrace(); } } /**Component initialization*/ private void jbInit() throws Exception { this.setLayout(borderLayout1); panel1.addKeyListener(new java.awt.event.KeyAdapter() { public void keyPressed(KeyEvent e) { panel1_keyPressed(e); } }); this.add(panel1, BorderLayout.CENTER); } /**Get Applet information*/ public String getAppletInfo() { return "Applet Information"; } /**Get parameter info*/ public String[][] getParameterInfo() { return null; } void panel1_keyPressed(KeyEvent e) { panel1.getGraphics().clearRect(0,0,300,300); if (e.getKeyCode() == e.VK_LEFT) x -= 1; if (e.getKeyCode() == e.VK_RIGHT) x += 1; if (e.getKeyCode() == e.VK_UP) y -= 1; if (e.getKeyCode() == e.VK_DOWN) y += 1; panel1.getGraphics().fillOval(x,y,15,15); }}?? 快捷鍵說明
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