复利计算器2.0
Posted 05卢琪
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import java.text.DecimalFormat;
public class Calculate {
// 形参为本金，利率，存入年限
// F：复利终值
// P：本金
// I：利率
// N：存入年限
// C: 年复利次数
double principal;//本金
double yearRate;//年利率
int years;//存入年限
int bonusTime;//年复利次数
double compoundInterest;//复利终值
double simpleInterest;
double i;
public Calculate(String P, String I, String N, String C, String F) {
if(P == null || P.length() <= 0){
principal = 0;
}else {
principal = Double.parseDouble(P);
}
if(I == null || I.length() <= 0){
yearRate = 0;
}else {
yearRate = Double.parseDouble(I);
}
if(N == null || N.length() <= 0){
years = 0;
}else {
years = Integer.parseInt(N);
}
if(C == null || C.length() <= 0){
bonusTime = 0;
}else {
bonusTime = Integer.parseInt(C);
}
if(F == null || F.length() <= 0){
compoundInterest = 0;
}else {
compoundInterest = Double.parseDouble(F);
}
i = Math.pow(1.0 + yearRate / bonusTime, bonusTime) - 1;
}
//求复利终值
public String calculateCompoundInterest(){
DecimalFormat df = new DecimalFormat("#.0000");
compoundInterest = principal * Math.pow((1 + i), years);
return df.format(compoundInterest);
}
//求本金
public String calculatePrincipal() {
DecimalFormat df = new DecimalFormat("#.0000");
principal = compoundInterest / Math.pow((1 + i), years);
return df.format(principal);
}
//求时间
public String calculateYears() {
if((Math.log(compoundInterest / principal) / Math.log(1 + i)) % 1 > 0){
years = (int) (Math.log(compoundInterest / principal) / Math.log(1 + i)) + 1;
}
return String.valueOf(years);
}
//求单利
public String calculatSimpleInterest() {
simpleInterest = principal * yearRate * years + principal;
return String.valueOf(simpleInterest);
}
}
1 import java.awt.Font; 2 import java.awt.event.MouseAdapter; 3 import java.awt.event.MouseEvent; 4 5 import javax.swing.JButton; 6 import javax.swing.JFrame; 7 import javax.swing.JLabel; 8 import javax.swing.JRadioButton; 9 import javax.swing.JTextField; 10 import javax.swing.SwingUtilities; 11 import javax.swing.UIManager; 12 13 import org.dyno.visual.swing.layouts.Constraints; 14 import org.dyno.visual.swing.layouts.GroupLayout; 15 import org.dyno.visual.swing.layouts.Leading; 16 17 //VS4E -- DO NOT REMOVE THIS LINE! 18 public class MainFrame extends JFrame { 19 20 private static final long serialVersionUID = 1L; 21 private JLabel jLabel0; 22 private JLabel jLabel1; 23 private JLabel jLabel2; 24 private JLabel jLabel3; 25 public MainFrame() { 26 initComponents(); 27 } 28 29 private void initComponents() { 30 setLayout(new GroupLayout()); 31 add(getJLabel0(), new Constraints(new Leading(60, 10, 10), new Leading(70, 10, 10))); 32 add(getJLabel1(), new Constraints(new Leading(60, 10, 10), new Leading(170, 10, 10))); 33 add(getJLabel2(), new Constraints(new Leading(60, 10, 10), new Leading(270, 10, 10))); 34 add(getJLabel3(), new Constraints(new Leading(60, 10, 10), new Leading(370, 10, 10))); 35 add(getJLabel4(), new Constraints(new Leading(60, 10, 10), new Leading(470, 10, 10))); 36 add(getJTextField0(), new Constraints(new Leading(290, 300, 10, 10), new Leading(70, 50, 10, 10))); 37 add(getJTextField1(), new Constraints(new Leading(290, 300, 10, 10), new Leading(170, 50, 10, 10))); 38 add(getJTextField2(), new Constraints(new Leading(290, 300, 10, 10), new Leading(270, 50, 10, 10))); 39 add(getJTextField3(), new Constraints(new Leading(290, 300, 10, 10), new Leading(370, 50, 10, 10))); 40 add(getJTextField4(), new Constraints(new Leading(290, 300, 10, 10), new Leading(470, 50, 10, 10))); 41 add(getJRadioButton0(), new Constraints(new Leading(630, 10, 10), new Leading(70, 10, 10))); 42 add(getJRadioButton1(), new Constraints(new Leading(630, 10, 10), new Leading(170, 120, 10))); 43 add(getJRadioButton2(), new Constraints(new Leading(630, 10, 10), new Leading(270, 10, 10))); 44 add(getJRadioButton3(), new Constraints(new Leading(630, 10, 10), new Leading(370, 10, 10))); 45 add(getJButton0(), new Constraints(new Leading(650, 10, 10), new Leading(470, 10, 10))); 46 setSize(800, 600); 47 } 48 49 private JRadioButton getJRadioButton3() { 50 if (jRadioButton3 == null) { 51 jRadioButton3 = new JRadioButton(); 52 jRadioButton3.setFont(new Font("宋体", Font.BOLD, 40)); 53 jRadioButton3.setSelected(false); 54 jRadioButton3.setText("求单利"); 55 jRadioButton3.addMouseListener(new MouseAdapter() { 56 57 public void mouseClicked(MouseEvent event) { 58 jRadioButton3MouseMouseClicked(event); 59 } 60 }); 61 } 62 return jRadioButton3; 63 } 64 65 private JRadioButton getJRadioButton2() { 66 if (jRadioButton2 == null) { 67 jRadioButton2 = new JRadioButton(); 68 jRadioButton2.setFont(new Font("宋体", Font.BOLD, 40)); 69 jRadioButton2.setSelected(false); 70 jRadioButton2.setText("求时间"); 71 jRadioButton2.addMouseListener(new MouseAdapter() { 72 73 public void mouseClicked(MouseEvent event) { 74 jRadioButton2MouseMouseClicked(event); 75 } 76 }); 77 } 78 return jRadioButton2; 79 } 80 81 private JTextField getJTextField4() { 82 if (jTextField4 == null) { 83 jTextField4 = new JTextField(); 84 jTextField4.setFont(font); 85 jTextField4.setEditable(false); 86 } 87 return jTextField4; 88 } 89 90 private JLabel getJLabel4() { 91 if (jLabel4 == null) { 92 jLabel4 = new JLabel(); 93 jLabel4.setFont(new Font("宋体", Font.BOLD, 40)); 94 jLabel4.setText("复利终值："); 95 } 96 return jLabel4; 97 } 98 99 private JRadioButton getJRadioButton1() { 100 if (jRadioButton1 == null) { 101 jRadioButton1 = new JRadioButton(); 102 jRadioButton1.setFont(new Font("宋体", Font.BOLD, 40)); 103 jRadioButton1.setSelected(true); 104 jRadioButton1.setText("求复利"); 105 jRadioButton1.addMouseListener(new MouseAdapter() { 106 107 public void mouseClicked(MouseEvent event) { 108 jRadioButton1MouseMouseClicked(event); 109 } 110 }); 111 } 112 return jRadioButton1; 113 } 114 115 private JRadioButton getJRadioButton0() { 116 if (jRadioButton0 == null) { 117 jRadioButton0 = new JRadioButton(); 118 jRadioButton0.setFont(new Font("宋体", Font.BOLD, 40)); 119 jRadioButton0.setSelected(false); 120 jRadioButton0.setText("求本金"); 121 jRadioButton0.addMouseListener(new MouseAdapter() { 122 123 public void mouseClicked(MouseEvent event) { 124 jRadioButton0MouseMouseClicked(event); 125 } 126 }); 127 } 128 return jRadioButton0; 129 } 130 131 private JButton getJButton0() { 132 if (jButton0 == null) { 133 jButton0 = new JButton(); 134 jButton0.setFont(new Font("宋体", Font.BOLD, 40)); 135 jButton0.setText("计算"); 136 jButton0.addMouseListener(new MouseAdapter() { 137 138 public void mouseClicked(MouseEvent event) { 139 jButton0MouseMouseClicked(event); 140 } 141 }); 142 } 143 return jButton0; 144 } 145 146 private JTextField getJTextField3() { 147 if (jTextField3 == null) { 148 jTextField3 = new JTextField(); 149 jTextField3.setFont(font); 150 } 151 return jTextField3; 152 } 153 154 private JTextField getJTextField2() { 155 if (jTextField2 == null) { 156 jTextField2 = new JTextField(); 157 jTextField2.setFont(font); 158 } 159 return jTextField2; 160 } 161 162 private JTextField getJTextField1() { 163 if (jTextField1 == null) { 164 jTextField1 = new JTextField(); 165 jTextField1.setFont(font); 166 } 167 return jTextField1; 168 } 169 170 private JTextField getJTextField0() { 171 if (jTextField0 == null) { 172 jTextField0 = new JTextField(); 173 jTextField0.setFont(font); 174 } 175 return jTextField0; 176 } 177 178 Font font = new Font("宋体",Font.BOLD,40); 179 private JTextField jTextField0; 180 private JTextField jTextField1; 181 private JTextField jTextField2; 182 private JTextField jTextField3; 183 private JButton jButton0; 184 private JRadioButton jRadioButton0; 185 private JRadioButton jRadioButton1; 186 private JLabel jLabel4; 187 private JTextField jTextField4; 188 private JRadioButton jRadioButton2; 189 private JRadioButton jRadioButton3; 190 private static final String PREFERRED_LOOK_AND_FEEL = "javax.swing.plaf.metal.MetalLookAndFeel"; 191 private JLabel getJLabel3() { 192 if (jLabel3 == null) { 193 jLabel3 = new JLabel(); 194 jLabel3.setFont(font); 195 jLabel3.setText("年复利次数："); 196 } 197 return jLabel3; 198 } 199 200 private JLabel getJLabel2() { 201 if (jLabel2 == null) { 202 jLabel2 = new JLabel(); 203 jLabel2.setFont(font); 204 jLabel2.setText("存入年限："); 205 } 206 return jLabel2; 207 } 208 209 private JLabel getJLabel1() { 210 if (jLabel1 == null) { 211 jLabel1 = new JLabel(); 212 jLabel1.setFont(new Font("宋体", Font.BOLD, 40)); 213 jLabel1.setText("年利率比："); 214 } 215 return jLabel1; 216 } 217 218 private JLabel getJLabel0() { 219 if (jLabel0 == null) { 220 jLabel0 = new JLabel(); 221 jLabel0.setFont(font); 222 jLabel0.setText("存入本金："); 223 } 224 return jLabel0; 225 } 226 227 private static void installLnF() { 228 try { 229 String lnfClassname = PREFERRED_LOOK_AND_FEEL; 230 if (lnfClassname == null) 231 lnfClassname = UIManager.getCrossPlatformLookAndFeelClassName(); 232 UIManager.setLookAndFeel(lnfClassname); 233 } catch (Exception e) { 234 System.err.println("Cannot install " + PREFERRED_LOOK_AND_FEEL + " on this platform:" + e.getMessage()); 235 } 236 } 237 238 /** 239 * Main entry of the class. 240 * Note: This class is only created so that you can easily preview the result at runtime. 241 * It is not expected to be managed by the designer. 242 * You can modify it as you like. 243 */ 244 public static void main(String[] args) { 245 installLnF(); 246 SwingUtilities.invokeLater(new Runnable() { 247 public void run() { 248 MainFrame frame = new MainFrame(); 249 frame.setDefaultCloseOperation(MainFrame.EXIT_ON_CLOSE); 250 frame.setTitle("复利计算器 V3.0"); 251 frame.getContentPane().setPreferredSize(frame.getSize()); 252 frame.pack(); 253 frame.setLocationRelativeTo(null); 254 frame.setVisible(true); 255 } 256 }); 257 258 } 259 260 private void jButton0MouseMouseClicked(MouseEvent event) { 261 262 // if (jTextField0.getText() == null || jTextField0.getText().length() <= 0) { 263 // JOptionPane.showMessageDialog( null,"请输入存入本金"); 264 // }else if (jTextField1.getText() == null || jTextField1.getText().length() <= 0){ 265 // JOptionPane.showMessageDialog( null,"请输入利率比"); 266 // }else if (jTextField2.getText() == null || jTextField2.getText().length() <= 0) { 267 // JOptionPane.showMessageDialog( null,"请输入存入年限"); 268 // }else if (jTextField3.getText() == null || jTextField3.getText().length() <= 0) { 269 // JOptionPane.showMessageDialog( null,"请输入年复利次数"); 270 // } 271 Calculate calculate = new Calculate(jTextField0.getText(), jTextField1.getText(), jTextField2.getText(), jTextField3.getText(), jTextField4.getText()); 272 if(!jTextField0.isEditable()){ 273 jTextField0.setText(calculate.calculatePrincipal()); 274 }else if (!jTextField2.isEditable()) { 275 jTextField2.setText(calculate.calculateYears()); 276 }else if (!jTextField4.isEditable()) { 277 if(jRadioButton1.isSelected()){ 278 jTextField4.setText(calculate.calculateCompoundInterest()); 279 }else { 280 jTextField4.setText(calculate.calculatSimpleInterest()); 281 } 282 } 283 284 285 } 286 public void clear() { 287 jTextField0.setText(null); 288 jTextField1.setText(null); 289 jTextField2.setText(null); 290 jTextField3.setText(null); 291 jTextField4.setText(null); 292 } 293 294 private void jRadioButton0MouseMouseClicked(MouseEvent event) { 295 clear(); 296 jRadioButton0.setSelected(true); 297 jRadioButton1.setSelected(false); 298 jRadioButton2.setSelected(false); 299 jRadioButton3.setSelected(false); 300 jTextField0.setEditable(false); 301 jTextField2.setEditable(true); 302 jTextField3.setEditable(true); 303 jTextField4.setEditable(true); 304 } 305 306 private void jRadioButton1MouseMouseClicked(MouseEvent event) { 307 clear(); 308 jRadioButton0.setSelected(false); 309 jRadioButton1.setSelected(true); 310 jRadioButton2.setSelected(false); 311 jRadioButton3.setSelected(false); 312 jTextField0.setEditable(true); 313 jTextField2.setEditable(true); 314 jTextField3.setEditable(true); 315 jTextField4.setEditable(false); 316 jLabel4.setText("复利终值："); 317 } 318 319 private void jRadioButton2MouseMouseClicked(MouseEvent event) { 320 clear(); 321 jRadioButton0.setSelected(false); 322 jRadioButton1.setSelected(false); 323 jRadioButton2.setSelected(true); 324 jRadioButton3.setSelected(false); 325 jTextField0.setEditable(true); 326 jTextField2.setEditable(false); 327 jTextField3.setEditable(true); 328 jTextField4.setEditable(true); 329 } 330 331 private void jRadioButton3MouseMouseClicked(MouseEvent event) { 332 clear(); 333 jRadioButton0.setSelected(false); 334 jRadioButton1.setSelected(false); 335 jRadioButton2.setSelected(false); 336 jRadioButton3.setSelected(true); 337 jTextField0.setEditable(true); 338 jTextField2.setEditable(true); 339 jTextField3.setEditable(false); 340 jTextField4.setEditable(false); 341 jLabel4.setText("单利本息："); 342 343 } 344 345 }
实现计算复利，计算本金，计算单利，计算存款时间
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