看图吧，Java

Question

package salary; import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.text.NumberFormat; public class Salary extends JFrame{ //声明标签 private JLabel numl; private JLabel basel; private JLabel salel; //声明文本框 private JTextField numf; private JTextField basef; private JTextField salef; //声明滚动条 private TextArea sumt; //声明按钮 private JButton btnsure; private JButton btnclean; private JButton btnout; //构造方法------------------------------------------------------------------ public Salary(){ q(); w(); r(); setSize(300, 400); setTitle("工资发放程序"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); pack(); } //实例化组件---------------------------------------------------------------------- private void q(){ numl=new JLabel("编号"); basel=new JLabel("基本工资"); salel=new JLabel("销售额"); numf=new JTextField(); numf.setColumns(10); basef=new JTextField(); basef.setColumns(10); salef=new JTextField(); salef.setColumns(10); sumt = new TextArea(); sumt.setColumns(30); btnsure=new JButton("工资计算"); btnclean=new JButton("清除输入"); btnout=new JButton("清除显示框内容"); } //布局----------------------------------------------------------------------- private void w(){ Container a = getContentPane(); //存放标签 JPanel panel1 = new JPanel(new GridLayout(3, 1)); panel1.add(numl); panel1.add(basel); panel1.add(salel); //存放文本框 JPanel panel2 = new JPanel(new GridLayout(3, 1)); panel2.add(numf,new FlowLayout(FlowLayout.LEFT,10,10)); panel2.add(basef,new FlowLayout(FlowLayout.LEFT,10,10)); panel2.add(salef,new FlowLayout(FlowLayout.LEFT,10,10)); //存放文本框与标签 JPanel panel3=new JPanel(new BorderLayout()); panel3.setBorder(BorderFactory.createEmptyBorder(10, 10, 5, 10)); panel3.add(panel1,BorderLayout.LINE_START); //西 panel3.add(panel2,BorderLayout.LINE_END); //东 //存放按钮 JPanel panelBtn= new JPanel(new FlowLayout(FlowLayout.CENTER,20,20)); panelBtn.add(btnsure); panelBtn.add(btnclean); //面板——1 JPanel panel=new JPanel(new BorderLayout()); panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 5, 10)); panel.add(panel3,BorderLayout.PAGE_START); //北 panel.add(panelBtn,BorderLayout.CENTER); panel.add(btnout,BorderLayout.PAGE_END); //南 //总面板 JPanel pan=new JPanel(new BorderLayout()); pan.setBorder(BorderFactory.createEmptyBorder(10, 10, 5, 10)); pan.add(panel,BorderLayout.CENTER); pan.add(sumt,BorderLayout.LINE_END); // a.add(pan); } //-------------------------------------------------------------------------------------- private String t(){ double sum,s,b; s=Double.parseDouble(salef.getText()); b=Double.parseDouble(basef.getText()); if(s>=30.0 && s<=299.99) sum=s*0.05+b; else if(s>=300.0 && s<=999.9) sum=s*0.1+b; else if(s>=1000.0) sum=s*0.15+b; else sum=b; String out=""; out +=String.format("%s\t%.1f\t%.1f\t%.1f\n", numf.getText(),b,s,sum); return out; } //---------------------------------------------------------------------------------- private class btnsure implements ActionListener { public void actionPerformed(ActionEvent e) {   String s="编号 \t"+"基本工资 \t"+"销售额 \t"+"工资 \n"; String s1 =s+sumt.getText(); s1 +=t(); sumt.setText(s1); } } //--------------------------------------------------------------------------------------- private class btnclean implements ActionListener { public void actionPerformed(ActionEvent e) {   numf.setText(""); basef.setText(""); salef.setText(""); } } //--------------------------------------------------------------------------------------- private class btnout implements ActionListener { public void actionPerformed(ActionEvent e) {     sumt.setText("");   } } //--------------------------------------------------------------------------------------- private void r() { btnsure h1 = new btnsure();   btnsure.addActionListener(h1); btnclean h2=new btnclean();   btnclean.addActionListener(h2); btnout h3 = new btnout();   btnout.addActionListener(h3); } public static void main(String[] args) { JFrame.setDefaultLookAndFeelDecorated(true); // 窗体装饰 Salary frame = new Salary(); frame.setVisible(true); } }

Answer 1

这是炫耀还是什么，哈哈~