1 此版本的复利计算器对输入的数据进行了限制，只能输入数字字符，并对输入的数据进行判断是否完整
2 package JSQ;
3
4 import java.awt.EventQueue;
5
6 import javax.swing.JFrame;
7 import javax.swing.JPanel;
8 import javax.swing.border.EmptyBorder;
9 import javax.swing.ButtonGroup;
10 import javax.swing.JLabel;
11 import javax.swing.JOptionPane;
12 import javax.swing.JTextField;
13 import javax.swing.JButton;
14
15 import java.awt.event.ActionListener;
16 import java.awt.event.ActionEvent;
17 import java.awt.event.KeyAdapter;
18 import java.awt.event.KeyEvent;
19 import java.awt.Font;
20 import java.awt.event.MouseAdapter;
21 import java.awt.event.MouseEvent;
22 import java.awt.Color;
23
24 import javax.swing.JComboBox;
25 import javax.swing.DefaultComboBoxModel;
26
27 import java.awt.event.ItemListener;
28 import java.awt.event.ItemEvent;
29
30 import javax.swing.JRadioButton;
31
32 public class FuLiJiSuanQi extends JFrame {
33
34 /**
35 *
36 */
37 private static final long serialVersionUID = 1L;
38 private JPanel contentPane;
39 private JTextField t2;
40 private JTextField t3;
41 private JTextField t1;
42 private JTextField t4;
43 private JLabel L3;
44 double capital,year,rate,sum;
45 double t_1,t_2,t_3;
46 int flag=1;
47 private JRadioButton r1;
48 private JRadioButton r2;
49 /**
50 * Launch the application.
51 */
52 public static void main(String[] args) {
53 EventQueue.invokeLater(new Runnable() {
54 @Override
55 public void run() {
56 try {
57 FuLiJiSuanQi frame = new FuLiJiSuanQi();
58 frame.setVisible(true);
59 } catch (Exception e) {
60 e.printStackTrace();
61 }
62 }
63 });
64 }
65
66 /**
67 * Create the frame.
68 */
69 @SuppressWarnings({ "unchecked", "rawtypes" })
70 public FuLiJiSuanQi() {
71 setTitle("\u590D\u5229\u8BA1\u7B97\u56683.0");
72 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
73 setBounds(100, 100, 474, 369);
74 contentPane = new JPanel();
75 contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
76 setContentPane(contentPane);
77 contentPane.setLayout(null);
78
79 final JLabel L1 = new JLabel("\u5B58\u6B3E(\u4E07):");//存款
80 L1.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
81 L1.setBounds(62, 85, 90, 15);
82 contentPane.add(L1);
83
84 t1 = new JTextField();
85 t1.setBounds(166, 84, 173, 21);
86 contentPane.add(t1);
87 t1.setColumns(10);
88 t1.addKeyListener(new KeyAdapter(){
89 public void keyTyped(KeyEvent e) {
90 int keyChar = e.getKeyChar();
91 if(keyChar >= KeyEvent.VK_0 && keyChar <= KeyEvent.VK_9){
92
93 }else{
94 e.consume(); //关键，屏蔽掉非法输入
95 }
96 }
97 });
98
99 L3 = new JLabel("\u5229\u7387( %):");//利率
100 L3.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
101 L3.setBounds(62, 142, 81, 15);
102 contentPane.add(L3);
103
104 t2 = new JTextField();
105 t2.setBounds(166, 115, 173, 21);
106 contentPane.add(t2);
107 t2.setColumns(10);
108 t2.addKeyListener(new KeyAdapter(){
109 public void keyTyped(KeyEvent e) {
110 int keyChar = e.getKeyChar();
111 if(keyChar >= KeyEvent.VK_0 && keyChar <= KeyEvent.VK_9){
112
113 }else{
114 e.consume();//关键，屏蔽掉非法输入
115 }
116 }
117 });
118
119 final JLabel L2 = new JLabel("\u672C\u606F(\u4E07):");//年限
120 L2.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
121 L2.setBounds(62, 117, 104, 15);
122 contentPane.add(L2);
123
124 t3 = new JTextField();
125 t3.setBounds(166, 140, 173, 21);
126 contentPane.add(t3);
127 t3.setColumns(10);
128 t3.addKeyListener(new KeyAdapter(){
129 public void keyTyped(KeyEvent e) {
130 int keyChar = e.getKeyChar();
131 if(keyChar >= KeyEvent.VK_0 && keyChar <= KeyEvent.VK_9){
132
133 }else{
134 e.consume(); //关键，屏蔽掉非法输入
135 }
136 }
137 });
138
139 final JButton btnNewButton = new JButton("\u5E74\u9650(\u5E74)");//本息
140 t4 = new JTextField();
141 t4.setEnabled(false);
142 t4.setForeground(new Color(127, 255, 212));
143 t4.setBounds(166, 182, 173, 21);
144 contentPane.add(t4);
145 t4.setColumns(10);
146 final JComboBox comboBox = new JComboBox();
147 comboBox.addItemListener(new ItemListener() {
148 @Override
149 public void itemStateChanged(ItemEvent e) {
150 if(comboBox.getSelectedItem().toString().equals("\u4F30\u7B97\u5B58\u671F"))
151 {
152 flag=1;
153 L1.setText("\u5B58\u6B3E(\u4E07):");
154 L2.setText("\u672C\u606F(\u4E07):");
155 L3.setText("\u5229\u7387(%):");
156 btnNewButton.setText("\u5E74\u9650(\u5E74)");
157 t1.setText(null);
158 t2.setText(null);
159 t3.setText(null);
160 t4.setText(null);
161 }
162 else if(comboBox.getSelectedItem().toString().equals("\u4F30\u7B97\u5B58\u989D")) {
163 flag=2;
164 L1.setText("\u672C\u606F(\u4E07)");
165 L2.setText("\u5E74\u9650(\u5E74):");
166 L3.setText("\u5229\u7387(%):");
167 btnNewButton.setText("\u5B58\u6B3E(\u4E07)");
168 t1.setText(null);
169 t2.setText(null);
170 t3.setText(null);
171 t4.setText(null);
172 }
173 else if(comboBox.getSelectedItem().toString().equals("\u4F30\u7B97\u5229\u7387")) {
174 flag=3;
175 L1.setText("\u5B58\u6B3E(\u4E07):");
176 L2.setText("\u672C\u606F(\u4E07):");
177 L3.setText("\u5E74\u9650(\u5E74):");
178 btnNewButton.setText("\u5229\u7387(%)");
179 t1.setText(null);
180 t2.setText(null);
181 t3.setText(null);
182 t4.setText(null);
183 }
184 else {
185 flag=4;
186 L1.setText("\u5B58\u6B3E(\u4E07):");
187 L2.setText("\u5E74\u9650(\u5E74):");
188 L3.setText("\u5229\u7387(%):");
189 btnNewButton.setText("\u672C\u606F(\u4E07)");
190 t1.setText(null);
191 t2.setText(null);
192 t3.setText(null);
193 t4.setText(null);
194 }
195 }
196 });
197 comboBox.setModel(new DefaultComboBoxModel(new String[] {"\u4F30\u7B97\u5B58\u671F", "\u4F30\u7B97\u5B58\u989D",
198 "\u4F30\u7B97\u5229\u7387", "\u4F30\u7B97\u672C\u606F"}));
199 comboBox.setBounds(53, 10, 90, 21);
200 contentPane.add(comboBox);
201
202 r1 = new JRadioButton("\u5355\u5229");
203 r1.setSelected(true);
204 r1.setBounds(6, 37, 64, 23);
205 contentPane.add(r1);
206
207 r2 = new JRadioButton("\u590D\u5229");
208 r2.setBounds(72, 37, 70, 23);
209 contentPane.add(r2);
210 ButtonGroup group=new ButtonGroup();
211 group.add(r1);
212 group.add(r2);
213 JLabel L = new JLabel("\u529F\u80FD");
214 L.setFont(new Font("Microsoft JhengHei", Font.PLAIN, 16));
215 L.setBounds(10, 13, 54, 15);
216 contentPane.add(L);
217 btnNewButton.addMouseListener(new MouseAdapter() {
218 @Override
219 public void mouseClicked(MouseEvent e) {
220 if (t1.getText().trim().equals("")||t2.getText().trim().equals("")||t3.getText().trim().equals("")) {
221 JOptionPane.showMessageDialog(contentPane, "请把数据输入完整");
222 }
223 else {
224 getTitleValue();
225 if(r1.isSelected()){
226 calculate();
227 }
228 else {
229 calculate_2();
230 }
231 }
232 }
233 });
234 btnNewButton.addActionListener(new ActionListener() {
235 @Override
236 public void actionPerformed(ActionEvent e) {
237 }
238 });
239 btnNewButton.setBounds(53, 181, 90, 23);
240 contentPane.add(btnNewButton);
241 }
242 public void getTitleValue() {
243 t_1=Double.parseDouble(t1.getText());
244 t_2=Double.parseDouble(t2.getText());
245 t_3=Double.parseDouble(t3.getText());
246 };
247 public void calculate() {
248 switch (flag) {
249 case 1:
250 capital=t_1;
251 sum=t_2;
252 rate=t_3;
253 year=(sum/capital-1)/(rate/100);
254 t4.setText(Double.toString(year));
255 break;
256 case 2:
257 sum=t_1;
258 year=t_2;
259 rate=t_3;
260 capital=sum/(year*rate/100+1);
261 t4.setText(Double.toString(capital));
262 break;
263 case 3:
264 capital=t_1;
265 sum=t_2;
266 year=t_3;
267 rate=(sum/capital-1)/year*100;
268 t4.setText(Double.toString(rate));
269 break;
270 case 4:
271 capital=t_1;
272 year=t_2;
273 rate=t_3;
274 sum=capital*(1+rate/100*year);
275 t4.setText(Double.toString(sum));
276 break;
277 default:
278 break;
279 }
280 }
281 public void calculate_2() {
282 switch (flag) {
283 case 1:
284 capital=t_1;
285 sum=t_2;
286 rate=t_3;
287 year=Math.log(sum/capital)/Math.log(1+rate/100);
288 t4.setText(Double.toString(year));
289 break;
290 case 2:
291 sum=t_1;
292 year=t_2;
293 rate=t_3;
294 capital=sum/Math.pow((1+rate/100),year);
295 t4.setText(Double.toString(capital));
296 break;
297 case 3:
298 capital=t_1;
299 sum=t_2;
300 year=t_3;
301 rate=(Math.pow((sum/capital),1/year)-1)*100;
302 t4.setText(Double.toString(rate));
303 break;
304 case 4:
305 capital=t_1;
306 year=t_2;
307 rate=t_3;
308 sum=capital*Math.pow((1+rate/100),year);
309 t4.setText(Double.toString(sum));
310 break;
311 default:
312 break;
313 }
314 }
315 }
316
317
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