深入浅出Java 2入门、进阶与应用实例 光盘源代码

import java.awt.*; import java.awt.event.*; import java.applet.*; public class GoodEveningApplet extends Applet { boolean isStandalone = false; BorderLayout borderLayout1 = new BorderLayout(); BorderLayout borderLayout2 = new BorderLayout(); CardLayout cardLayout1 = new CardLayout(); CardLayout cardLayout2 = new CardLayout(); Panel upper = new Panel(); Panel lower = new Panel(); Panel panel1 = new Panel(); Panel panel2 = new Panel(); Panel panel3 = new Panel(); Panel panel4 = new Panel(); Panel panel5 = new Panel(); List list1 = new List(); Label label1 = new Label(); Label label2 = new Label(); Label label3 = new Label(); Label label4 = new Label(); Label label5 = new Label(); Label label6 = new Label(); FlowLayout flowLayout1 = new FlowLayout(); FlowLayout flowLayout2 = new FlowLayout(); FlowLayout flowLayout3 = new FlowLayout(); FlowLayout flowLayout4 = new FlowLayout(); FlowLayout flowLayout5 = new FlowLayout(); Button button1 = new Button(); Choice choice1 = new Choice(); //Construct the applet public GoodEveningApplet() { } //Initialize the applet public void init() { choice1.addItem("English"); choice1.addItem("German"); choice1.addItem("Italian"); choice1.addItem("French"); choice1.addItem("Dutch"); try { jbInit(); } catch (Exception e) { e.printStackTrace(); } } //Component initialization private void jbInit() throws Exception { this.setLayout(borderLayout2); upper.setBackground(Color.orange); lower.setBackground(Color.magenta); lower.setLayout(cardLayout1); //panel1到panel5安排在lower中 panel1.setBackground(Color.yellow); panel1.setLayout(flowLayout5); panel2.setBackground(Color.magenta); panel2.setLayout(flowLayout4); panel3.setLayout(flowLayout3); panel3.setBackground(Color.cyan); panel4.setLayout(flowLayout2); panel4.setBackground(Color.pink); panel5.setBackground(Color.white); panel5.setLayout(flowLayout1); // panel1到panel5各个面板上使用的label问候语 label1.setBackground(Color.black); label1.setFont(new java.awt.Font("Dialog", Font.BOLD, 20)); label1.setForeground(Color.blue); label1.setText("Select a language"); label2.setFont(new java.awt.Font("Dialog", Font.BOLD, 24)); label2.setText("Good Evening!"); label3.setFont(new java.awt.Font("Dialog", Font.BOLD, 24)); label3.setText("Guten abend!"); label4.setFont(new java.awt.Font("Dialog", Font.BOLD, 24)); label4.setText(" Buona sera!"); label5.setFont(new java.awt.Font("Dialog", Font.BOLD, 24)); label5.setText("Bonsoir !"); label6.setFont(new java.awt.Font("Dialog", Font.BOLD, 24)); label6.setText("Goede avond!"); //在整个界面的北部添加upper组件，并添加upper中的组件：button和choice this.add(upper, java.awt.BorderLayout.NORTH); button1.setLabel("Push me"); button1.addActionListener(new GoodEveningApplet_button1_actionAdapter(this)); choice1.addItemListener(new GoodEveningApplet_choice1_itemAdapter(this)); upper.add(label1); upper.add(choice1); //在整个界面的中心添加lower面板，并将添加panel1-panel5到lower中 this.add(lower, java.awt.BorderLayout.CENTER); lower.add(panel1, "panel1"); lower.add(panel2, "panel2"); lower.add(panel3, "panel3"); lower.add(panel4, "panel4"); lower.add(panel5, "panel5"); //在整个界面的南端添加list组件 this.add(list1, java.awt.BorderLayout.SOUTH); //分别添加各标签到panel1-panel5面板中 panel5.add(label6, null); panel4.add(label5, null); panel3.add(label4, null); panel2.add(button1); panel2.add(label3, null); panel1.add(label2, null); } //Start the applet public void start() { } //Stop the applet public void stop() { } //Destroy the applet public void destroy() { } //Get Applet information public String getAppletInfo() { return "Applet Information"; } // choice组件的事件处理函数 public void choice1_itemStateChanged(ItemEvent e) { if ("English".equals(choice1.getSelectedItem())) { cardLayout1.show(lower, "panel1"); } else if ("German".equals(choice1.getSelectedItem())) { cardLayout1.show(lower, "panel2"); } else if ("Italian".equals(choice1.getSelectedItem())) { cardLayout1.show(lower, "panel3"); } else if ("French".equals(choice1.getSelectedItem())) { cardLayout1.show(lower, "panel4"); } else if ("Dutch".equals(choice1.getSelectedItem())) { cardLayout1.show(lower, "panel5"); } } // button1组件的事件处理函数 public void button1_actionPerformed(ActionEvent e) { label3.setForeground(new Color(255,255,0)); } } // choice组件的事件适配器 class GoodEveningApplet_choice1_itemAdapter implements ItemListener { private GoodEveningApplet adaptee; GoodEveningApplet_choice1_itemAdapter(GoodEveningApplet adaptee) { this.adaptee = adaptee; } public void itemStateChanged(ItemEvent e) { adaptee.choice1_itemStateChanged(e); } } // button1组件的事件适配器 class GoodEveningApplet_button1_actionAdapter implements ActionListener { private GoodEveningApplet adaptee; GoodEveningApplet_button1_actionAdapter(GoodEveningApplet adaptee) { this.adaptee = adaptee; } public void actionPerformed(ActionEvent e) { adaptee.button1_actionPerformed(e); } }