zoukankan html css js c++ java
复利计算器2.01

  1 package JSQ;
  2 
  3 import java.awt.EventQueue;
  4 
  5 public class FuLiJiSuanQi extends JFrame {
  6 
  7     /**
  8      * 
  9      */
 10     private static final long serialVersionUID = 1L;
 11     private JPanel contentPane;
 12     private JTextField textField_1;
 13     private JTextField textField_2;
 14     private JTextField textField;
 15     private JTextField textField_3;
 16     private JLabel label_1;
 17     double capital,year,rate,sum;
 18     int tag;
 19     /**
 20      * Launch the application.
 21      */
 22     public static void main(String[] args) {
 23         EventQueue.invokeLater(new Runnable() {
 24             public void run() {
 25                 try {
 26                     FuLiJiSuanQi frame = new FuLiJiSuanQi();
 27                     frame.setVisible(true);
 28                 } catch (Exception e) {
 29                     e.printStackTrace();
 30                 }
 31             }
 32         });
 33     }
 34 
 35     /**
 36      * Create the frame.
 37      */
 38     public FuLiJiSuanQi() {
 39         setTitle("u590Du5229u8BA1u7B97u56682.0");
 40         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 41         setBounds(100, 100, 450, 300);
 42         contentPane = new JPanel();
 43         contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
 44         setContentPane(contentPane);
 45         contentPane.setLayout(null);
 46         
 47         final JLabel label = new JLabel("u5B58u6B3E(u4E07):");
 48         label.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
 49         label.setBounds(62, 85, 90, 15);
 50         contentPane.add(label);
 51         
 52         textField = new JTextField();
 53         textField.setBounds(166, 84, 130, 21);
 54         contentPane.add(textField);
 55         textField.setColumns(10);
 56         
 57         label_1 = new JLabel("u5229u7387( %):");
 58         label_1.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
 59         label_1.setBounds(62, 142, 81, 15);
 60         contentPane.add(label_1);
 61         
 62         textField_1 = new JTextField();
 63         textField_1.setBounds(166, 115, 130, 21);
 64         contentPane.add(textField_1);
 65         textField_1.setColumns(10);
 66         
 67         JLabel label_2 = new JLabel("u5E74u9650(u5E74):");
 68         label_2.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
 69         label_2.setBounds(62, 117, 104, 15);
 70         contentPane.add(label_2);
 71         
 72         textField_2 = new JTextField();
 73         textField_2.setBounds(166, 140, 130, 21);
 74         contentPane.add(textField_2);
 75         textField_2.setColumns(10);
 76         
 77         final JButton btnNewButton = new JButton("u672Cu606F(u4E07)");
 78         btnNewButton.addMouseListener(new MouseAdapter() {
 79             @Override
 80             public void mouseClicked(MouseEvent e) {
 81                  capital=Double.parseDouble(textField.getText());
 82                  year=Double.parseDouble(textField_1.getText());
 83                  rate=Double.parseDouble(textField_2.getText());
 84                  if(tag==1)
 85                  {
 86                      sum=capital*Math.pow((1+rate/100),year);
 87                  }
 88                  else if(tag==0){
 89                      sum=capital*(1+rate/100)*year;
 90                 }
 91                  else {
 92                     sum=capital/Math.pow((1+rate/100),year);
 93                 }
 94                 textField_3.setText(Double.toString(sum));
 95             }
 96         });
 97         btnNewButton.addActionListener(new ActionListener() {
 98             public void actionPerformed(ActionEvent e) {
 99             }
100         });
101         btnNewButton.setBounds(53, 181, 90, 23);
102         contentPane.add(btnNewButton);
103         
104         textField_3 = new JTextField();
105         textField_3.setForeground(new Color(127, 255, 212));
106         textField_3.setEnabled(false);
107         textField_3.setBounds(166, 182, 130, 21);
108         contentPane.add(textField_3);
109         textField_3.setColumns(10);
110         
111         final JComboBox comboBox = new JComboBox();
112         comboBox.addItemListener(new ItemListener() {
113             public void itemStateChanged(ItemEvent e) {
114                 if(comboBox.getSelectedItem().toString().equals("u5355u5229u8BA1u7B97"))
115                 {
116                     tag=0;
117                     label.setText("u5B58u6B3E(u4E07):");
118                     btnNewButton.setText("u672Cu606F(u4E07)");
119                 }
120                 else if(comboBox.getSelectedItem().toString().equals("u590Du5229u8BA1u7B97")) {
121                     tag=1;
122                     label.setText("u5B58u6B3E(u4E07):");
123                     btnNewButton.setText("u672Cu606F(u4E07)");
124                 }
125                 else {
126                     tag=3;
127                     label.setText("u603Bu989D(u4E07):");
128                     btnNewButton.setText("u5E94u5B58u91D1u989D");
129                 }
130             }
131         });
132         comboBox.setModel(new DefaultComboBoxModel(new String[] {"u590Du5229u8BA1u7B97", "u5355u5229u8BA1u7B97", "u5B58u94B1u4F30u7B97"}));
133         comboBox.setBounds(53, 10, 90, 21);
134         contentPane.add(comboBox);
135         
136         JLabel label_3 = new JLabel("u529Fu80FD");
137         label_3.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
138         label_3.setBounds(10, 13, 54, 15);
139         contentPane.add(label_3);
140     }
141 }
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原文地址：https://www.cnblogs.com/LwF39/p/5275354.html