几个java小程序——自己写的

/** * @(#)CardLayoutDemo.java * * * @author * @version 1.00 2008/8/10 */ import java.awt.*; import java.awt.event.*; public class CardLayoutDemo extends Frame{ /** * */ private static final long serialVersionUID = 1L; /** * Creates a new instance of <code>CardLayoutDemo</code>. */ Panel pnlCommondArea=new Panel(); Panel pnlDisplayArea=new Panel(); CardLayout cardlayout1=new CardLayout(); Button btnFirst=new Button("第一个"); Button btnPrevious=new Button("前一个"); Button btnNext=new Button("后一个"); Button btnLast=new Button("最后一个"); public CardLayoutDemo() { this.setLayout(new BorderLayout()); this.add(pnlCommondArea,BorderLayout.NORTH); this.add(pnlDisplayArea,BorderLayout.CENTER); pnlDisplayArea.setLayout(cardlayout1); Panel pnlFirst=new Panel(); pnlFirst.setBackground(Color.blue); pnlFirst.setForeground(Color.white); //设置字的颜色 pnlDisplayArea.add("first",pnlFirst); pnlFirst.add(new Label("This is the first Panel!")); Panel pnlSecond=new Panel(); pnlSecond.setBackground(Color.red); pnlSecond.setForeground(Color.blue); pnlDisplayArea.add("second",pnlSecond); pnlSecond.add(new Label("This is the second Panel!")); Panel pnlThird=new Panel(); pnlThird.setBackground(Color.black); pnlThird.setForeground(Color.white); pnlDisplayArea.add("third",pnlThird); pnlThird.add(new Label("This is the third Panel!")); Panel pnlFourth=new Panel(); pnlFourth.setBackground(Color.green); pnlFourth.setForeground(Color.black); pnlDisplayArea.add("fourth",pnlFourth); pnlFourth.add(new Label("This is the fourth Panel!")); Panel pnlFifth=new Panel(); pnlFifth.setBackground(Color.cyan); pnlFifth.setForeground(Color.GRAY); pnlDisplayArea.add("fifth",pnlFifth); pnlFifth.add(new Label("This is the fifth Panel!")); btnFirst.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { processAction(e); } }); btnPrevious.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { processAction(e); } }); btnNext.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { processAction(e); } }); btnLast.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { processAction(e); } }); pnlCommondArea.add(btnFirst); pnlCommondArea.add(btnPrevious); pnlCommondArea.add(btnNext); pnlCommondArea.add(btnLast); } /** * @param args the command line arguments */ @SuppressWarnings("deprecation") public static void main(String[] args) { // TODO code application logic here CardLayoutDemo frmCardLayout=new CardLayoutDemo(); frmCardLayout.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); frmCardLayout.pack(); frmCardLayout.show(); } public Dimension getPreferredSize() { return new Dimension(300,300); } private void processAction(ActionEvent e) { Button btnEvent=(Button)e.getSource(); if(btnEvent.equals(btnFirst)) cardlayout1.first(pnlDisplayArea); else if(btnEvent.equals(btnLast)) cardlayout1.last(pnlDisplayArea); else if(btnEvent.equals(btnPrevious)) cardlayout1.previous(pnlDisplayArea); else if(btnEvent.equals(btnNext)) cardlayout1.next(pnlDisplayArea); } }