这是复利计算器3.0版本，新加了一些功能，实现了基本的单复利计算，但还未对输入出错进行处理，下一个版本将更加完好
1 package JSQ;
2
3 import java.awt.EventQueue;
4
5 import javax.swing.JFrame;
6 import javax.swing.JPanel;
7 import javax.swing.border.EmptyBorder;
8 import javax.swing.ButtonGroup;
9 import javax.swing.JLabel;
10 import javax.swing.JTextField;
11 import javax.swing.JButton;
12 import java.awt.event.ActionListener;
13 import java.awt.event.ActionEvent;
14 import java.awt.Font;
15 import java.awt.event.MouseAdapter;
16 import java.awt.event.MouseEvent;
17 import java.awt.Color;
18 import javax.swing.JComboBox;
19 import javax.swing.DefaultComboBoxModel;
20 import java.awt.event.ItemListener;
21 import java.awt.event.ItemEvent;
22 import javax.swing.JRadioButton;
23
24 public class FuLiJiSuanQi extends JFrame {
25
26 /**
27 *
28 */
29 private static final long serialVersionUID = 1L;
30 private JPanel contentPane;
31 private JTextField t2;
32 private JTextField t3;
33 private JTextField t1;
34 private JTextField t4;
35 private JLabel L3;
36 double capital,year,rate,sum;
37 int flag=1;
38 private JRadioButton r1;
39 private JRadioButton r2;
40 /**
41 * Launch the application.
42 */
43 public static void main(String[] args) {
44 EventQueue.invokeLater(new Runnable() {
45 @Override
46 public void run() {
47 try {
48 FuLiJiSuanQi frame = new FuLiJiSuanQi();
49 frame.setVisible(true);
50 } catch (Exception e) {
51 e.printStackTrace();
52 }
53 }
54 });
55 }
56
57 /**
58 * Create the frame.
59 */
60 public FuLiJiSuanQi() {
61 setTitle("\u590D\u5229\u8BA1\u7B97\u56683.0");
62 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
63 setBounds(100, 100, 474, 369);
64 contentPane = new JPanel();
65 contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
66 setContentPane(contentPane);
67 contentPane.setLayout(null);
68
69 final JLabel L1 = new JLabel("\u5B58\u6B3E(\u4E07):");//存款
70 L1.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
71 L1.setBounds(62, 85, 90, 15);
72 contentPane.add(L1);
73
74 t1 = new JTextField();
75 t1.setBounds(166, 84, 173, 21);
76 contentPane.add(t1);
77 t1.setColumns(10);
78
79 L3 = new JLabel("\u5229\u7387( %):");//利率
80 L3.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
81 L3.setBounds(62, 142, 81, 15);
82 contentPane.add(L3);
83
84 t2 = new JTextField();
85 t2.setBounds(166, 115, 173, 21);
86 contentPane.add(t2);
87 t2.setColumns(10);
88
89 final JLabel L2 = new JLabel("\u672C\u606F(\u4E07):");//年限
90 L2.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
91 L2.setBounds(62, 117, 104, 15);
92 contentPane.add(L2);
93
94 t3 = new JTextField();
95 t3.setBounds(166, 140, 173, 21);
96 contentPane.add(t3);
97 t3.setColumns(10);
98 final JButton btnNewButton = new JButton("\u5E74\u9650(\u5E74)");//本息
99 t4 = new JTextField();
100 t4.setEnabled(false);
101 t4.setForeground(new Color(127, 255, 212));
102 t4.setBounds(166, 182, 173, 21);
103 contentPane.add(t4);
104 t4.setColumns(10);
105
106 final JComboBox comboBox = new JComboBox();
107 comboBox.addItemListener(new ItemListener() {
108 @Override
109 public void itemStateChanged(ItemEvent e) {
110 if(comboBox.getSelectedItem().toString().equals("\u4F30\u7B97\u5B58\u671F"))
111 {
112 flag=1;
113 L1.setText("\u5B58\u6B3E(\u4E07):");
114 L2.setText("\u672C\u606F(\u4E07):");
115 L3.setText("\u5229\u7387(%):");
116 btnNewButton.setText("\u5E74\u9650(\u5E74)");
117 t1.setText(null);
118 t2.setText(null);
119 t3.setText(null);
120 }
121 else if(comboBox.getSelectedItem().toString().equals("\u4F30\u7B97\u5B58\u989D")) {
122 flag=2;
123 L1.setText("\u672C\u606F(\u4E07)");
124 L2.setText("\u5E74\u9650(\u5E74):");
125 L3.setText("\u5229\u7387(%):");
126 btnNewButton.setText("\u5B58\u6B3E(\u4E07)");
127 t1.setText(null);
128 t2.setText(null);
129 t3.setText(null);
130 }
131 else if(comboBox.getSelectedItem().toString().equals("\u4F30\u7B97\u5229\u7387")) {
132 flag=3;
133 L1.setText("\u5B58\u6B3E(\u4E07):");
134 L2.setText("\u672C\u606F(\u4E07):");
135 L3.setText("\u5E74\u9650(\u5E74):");
136 btnNewButton.setText("\u5229\u7387(%)");
137 t1.setText(null);
138 t2.setText(null);
139 t3.setText(null);
140 }
141 else {
142 flag=4;
143 L1.setText("\u5B58\u6B3E(\u4E07):");
144 L2.setText("\u5E74\u9650(\u5E74):");
145 L3.setText("\u5229\u7387(%):");
146 btnNewButton.setText("\u672C\u606F(\u4E07)");
147 t1.setText(null);
148 t2.setText(null);
149 t3.setText(null);
150 }
151 }
152 });
153 comboBox.setModel(new DefaultComboBoxModel(new String[] {"\u4F30\u7B97\u5B58\u671F", "\u4F30\u7B97\u5B58\u989D", "\u4F30\u7B97\u5229\u7387", "\u4F30\u7B97\u672C\u606F"}));
154 comboBox.setBounds(53, 10, 90, 21);
155 contentPane.add(comboBox);
156
157 r1 = new JRadioButton("\u5355\u5229");
158 r1.setSelected(true);
159 r1.setBounds(6, 37, 64, 23);
160 contentPane.add(r1);
161
162 r2 = new JRadioButton("\u590D\u5229");
163 r2.setBounds(72, 37, 70, 23);
164 contentPane.add(r2);
165 ButtonGroup group=new ButtonGroup();
166 group.add(r1);
167 group.add(r2);
168 JLabel L = new JLabel("\u529F\u80FD");
169 L.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
170 L.setBounds(10, 13, 54, 15);
171 contentPane.add(L);
172 btnNewButton.addMouseListener(new MouseAdapter() {
173 @Override
174 public void mouseClicked(MouseEvent e) {
175 if(r1.isSelected()){
176 switch (flag) {
177 case 1:
178 capital=Double.parseDouble(t1.getText());
179 sum=Double.parseDouble(t2.getText());
180 rate=Double.parseDouble(t3.getText());
181 year=(sum/capital-1)/(rate/100);
182 t4.setText(Double.toString(year));
183 break;
184 case 2:
185 sum=Double.parseDouble(t1.getText());
186 year=Double.parseDouble(t2.getText());
187 rate=Double.parseDouble(t3.getText());
188 capital=sum/(year*rate/100+1);
189 t4.setText(Double.toString(capital));
190 break;
191 case 3:
192 capital=Double.parseDouble(t1.getText());
193 sum=Double.parseDouble(t2.getText());
194 year=Double.parseDouble(t3.getText());
195 rate=(sum/capital-1)/year*100;
196 t4.setText(Double.toString(rate));
197 break;
198 case 4:
199 capital=Double.parseDouble(t1.getText());
200 year=Double.parseDouble(t2.getText());
201 rate=Double.parseDouble(t3.getText());
202 sum=capital*(1+rate/100*year);
203 t4.setText(Double.toString(sum));
204 break;
205 default:
206 break;
207 }
208 }
209 else {
210 switch (flag) {
211 case 1:
212 capital=Double.parseDouble(t1.getText());
213 sum=Double.parseDouble(t2.getText());
214 rate=Double.parseDouble(t3.getText());
215 year=Math.log(sum/capital)/Math.log(1+rate/100);
216 t4.setText(Double.toString(year));
217 break;
218 case 2:
219 sum=Double.parseDouble(t1.getText());
220 year=Double.parseDouble(t2.getText());
221 rate=Double.parseDouble(t3.getText());
222 capital=sum/Math.pow((1+rate/100),year);
223 t4.setText(Double.toString(capital));
224 break;
225 case 3:
226 capital=Double.parseDouble(t1.getText());
227 sum=Double.parseDouble(t2.getText());
228 year=Double.parseDouble(t3.getText());
229 rate=(Math.pow((sum/capital),1/year)-1)*100;
230 t4.setText(Double.toString(rate));
231 break;
232 case 4:
233 capital=Double.parseDouble(t1.getText());
234 year=Double.parseDouble(t2.getText());
235 rate=Double.parseDouble(t3.getText());
236 sum=capital*Math.pow((1+rate/100),year);
237 t4.setText(Double.toString(sum));
238 break;
239 default:
240 break;
241 }
242 }
243 }
244 });
245 btnNewButton.addActionListener(new ActionListener() {
246 @Override
247 public void actionPerformed(ActionEvent e) {
248 }
249 });
250 btnNewButton.setBounds(53, 181, 90, 23);
251 contentPane.add(btnNewButton);
252 }
253 }
