j2se实例

/* * 创建日期 2006-1-24 * * TODO 要更改此生成的文件的模板，请转至 * 窗口 － 首选项 － Java － 代码样式 － 代码模板 */ package ch4; import javax.swing.*; import java.awt.*; import java.awt.event.*; //import java.text.NumberFormat; public class TestIfElse extends JFrame{ private JLabel idLabel; private JLabel monthsalaryLabel; private JLabel commissionLabel; private JTextField idText; private JTextField monthsalaryText; private JTextField commissionText; private JTextArea text1; private JButton btnShow; private JButton btnClear; private JButton btnClearInputField; String out="编号\t"+"基本工资\t"+"销售额\t"+"工资\t"+"\n"; public TestIfElse() { createComponents(); registerEventHandlers(); layoutComponents(); setTitle("工资发放程序"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); pack(); } private void createComponents() { //组件实例化 idLabel=new JLabel(" 编号"); monthsalaryLabel=new JLabel(" 基本工资"); commissionLabel=new JLabel(" 销售额"); idText=new JTextField(10); monthsalaryText=new JTextField(10); commissionText=new JTextField(10); text1 = new JTextArea(); // text1.setAutoscrolls(true); //text1.setPreferredSize(new Dimension(350,200)); btnClearInputField=new JButton("清除输入"); btnShow = new JButton("工资计算"); btnClear = new JButton("清除显示框内容"); } private void registerEventHandlers() { //注册事件 btnShowActionEventHander hander1=new btnShowActionEventHander(); btnShow.addActionListener(hander1); btnClearActionEventHander hander2=new btnClearActionEventHander(); btnClear.addActionListener(hander2); btnClearInputFieldActionEventHander hander3=new btnClearInputFieldActionEventHander(); btnClearInputField.addActionListener(hander3); } private void layoutComponents() { //布局 Container c=this.getContentPane(); // c.setLayout(new GridLayout(1, 2)); c.setLayout(new FlowLayout()); //存放文本框和标签 JPanel idPane = new JPanel(); idPane.add(idLabel); idPane.add(idText); //存放文本框和标签 JPanel monthsalaryPane = new JPanel(); monthsalaryPane.add(monthsalaryLabel); monthsalaryPane.add(monthsalaryText); //存放文本框和标签 JPanel commissionPane = new JPanel(); commissionPane.add(commissionLabel); commissionPane.add(commissionText); //存放按钮 JPanel buttonPane1 = new JPanel(); JPanel buttonPane2 = new JPanel(); buttonPane1.add(btnShow); buttonPane1.add(btnClearInputField); buttonPane2.add(btnClear); JPanel leftPane = new JPanel(new GridLayout(5,1)); leftPane.add(idPane); leftPane.add(monthsalaryPane); leftPane.add(commissionPane); leftPane.add(buttonPane1); leftPane.add(buttonPane2); JScrollPane scrollPane=new JScrollPane(text1); scrollPane.setPreferredSize(new Dimension(350,200)); c.add(leftPane); c.add(scrollPane); } private class btnShowActionEventHander implements ActionListener{ String id; double monthSalary; double commission; double salary; public void actionPerformed(ActionEvent e){ monthSalary=Double.parseDouble(monthsalaryText.getText()); commission=Double.parseDouble(commissionText.getText()); id=idText.getText(); if(commission>=30.0&&commission<=299.99) salary=commission*0.05+monthSalary; else if(commission>=300.0&&commission<=999.99) salary=commission*0.1+monthSalary; else if(commission>=1000.0) salary=commission*0.15+monthSalary; else salary=monthSalary; out+=id+"\t" +monthSalary+"\t" +commission+"\t" +salary+"\t\n"; text1.setText(out); } } private class btnClearInputFieldActionEventHander implements ActionListener{ public void actionPerformed(ActionEvent e) { idText.setText(""); monthsalaryText.setText(""); commissionText.setText(""); } } private class btnClearActionEventHander implements ActionListener{ public void actionPerformed(ActionEvent e) { text1.setText(""); out=""; } } public static void main(String[] args) { JFrame.setDefaultLookAndFeelDecorated(true); TestIfElse frame=new TestIfElse(); frame.setVisible(true); } } /* package ch4; import javax.swing.*; import java.awt.*; import java.awt.event.*; //import java.text.NumberFormat; public class TestIfElse extends JFrame{ private JLabel idLabel; private JLabel monthsalaryLabel; private JLabel commissionLabel; private JTextField idText; private JTextField monthsalaryText; private JTextField commissionText; private JTextArea text1; private JButton btnShow; private JButton btnClear; private JButton btnClearInputField; String out="编号\t"+"基本工资\t"+"销售额\t"+"工资\t"+"\n"; public TestIfElse() { createComponents(); registerEventHandlers(); layoutComponents(); setTitle("工资发放图形界面程序"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); pack(); } private void createComponents() { //组件实例化 idLabel=new JLabel(" 编号"); monthsalaryLabel=new JLabel(" 基本工资"); commissionLabel=new JLabel(" 销售额"); idText=new JTextField(10); monthsalaryText=new JTextField(10); commissionText=new JTextField(10); text1 = new JTextArea(); btnClearInputField=new JButton("清除输入"); btnShow = new JButton("贷款计算"); btnClear = new JButton("清除显示框内容"); } private void registerEventHandlers() { //注册事件 btnShowActionEventHander hander1=new btnShowActionEventHander(); btnShow.addActionListener(hander1); btnClearActionEventHander hander2=new btnClearActionEventHander(); btnClear.addActionListener(hander2); btnClearInputFieldActionEventHander hander3=new btnClearInputFieldActionEventHander(); btnClearInputField.addActionListener(hander3); } private void layoutComponents() { //布局 Container c=this.getContentPane(); c.setLayout(new GridLayout(1, 2)); //存放文本框和标签 JPanel idPane = new JPanel(); idPane.add(idLabel); idPane.add(idText); //存放文本框和标签 JPanel monthsalaryPane = new JPanel(); monthsalaryPane.add(monthsalaryLabel); monthsalaryPane.add(monthsalaryText); //存放文本框和标签 JPanel commissionPane = new JPanel(); commissionPane.add(commissionLabel); commissionPane.add(commissionText); //存放文本输入区域 JPanel textAndLabelFieldPane = new JPanel(new GridLayout(3,1)); textAndLabelFieldPane.add(idPane); textAndLabelFieldPane.add(monthsalaryPane); textAndLabelFieldPane.add(commissionPane); //存放按钮 JPanel buttonPane = new JPanel(new GridLayout(2,1)); JPanel buttonPane1 = new JPanel(); JPanel buttonPane2 = new J