?? frame1.java~12~
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package ex08_11;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Frame1 extends JFrame { JPanel contentPane; BorderLayout borderLayout1 = new BorderLayout(); /**Construct the frame*/ public Frame1() { enableEvents(AWTEvent.WINDOW_EVENT_MASK); try { jbInit(); } catch(Exception e) { e.printStackTrace(); } } /**Component initialization*/ private void jbInit() throws Exception { //setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]"))); contentPane = (JPanel) this.getContentPane(); contentPane.setLayout(borderLayout1); this.setSize(new Dimension(400, 300)); this.setTitle("Frame Title"); this.addMouseListener(new java.awt.event.MouseAdapter() { public void mouseReleased(MouseEvent e) { this_mouseReleased(e); } public void mousePressed(MouseEvent e) { this_mousePressed(e); } }); } /**Overridden so we can exit when window is closed*/ protected void processWindowEvent(WindowEvent e) { super.processWindowEvent(e); if (e.getID() == WindowEvent.WINDOW_CLOSING) { System.exit(0); } }Point startpoint; void this_mouseReleased(MouseEvent e) {Graphics mypaint;mypaint=getGraphics();mypaint.drawLine(startpoint.x,startpoint.y,e.getX(),e.getY()); } void this_mousePressed(MouseEvent e) {startpoint=e.getPoint(); }}?? 快捷鍵說明
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