复利计算器2.0





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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          原文地址：https://www.cnblogs.com/xiseven/p/5270024.html