复利计算1.0,2.0,3.0

	import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.NumberFormat;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.LineBorder;
/**
 * @author 守护
 *
 */

public class Interest  extends JFrame
{
private JLabel a1;
private JLabel a2;
private JLabel a3;
private JTextField b1;
private JTextField b2;
private JTextField b3;
private JButton c1;
private JButton c2;
private JButton c3;
private JTextArea text;
public Interest()
{
creatComponents()	;
layoutComponents();
registerHandlers();
setTitle("复利存款应用程序");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
}
private void  creatComponents()	
{
a1=new JLabel("本  金 ");
a1.setFont(new Font("宋体",Font.BOLD,18));
a2=new JLabel("年利率 ");
a2.setFont(new Font("宋体",Font.BOLD,18));
a3=new JLabel("年 数 ");
a3.setFont(new Font("宋体",Font.BOLD,18));

b1=new JTextField(10);
b2=new JTextField(10);
b3=new JTextField(10);
c1=new JButton("计算");
c1.setFont(new Font("宋体",Font.BOLD,15));
c3=new JButton("");
c3.setBackground(Color.GREEN);
c3.setToolTipText("LOVE YOU FOREVER");
c3.setBorder(new LineBorder(Color.RED,3));
c3.setFont(new Font("宋体",Font.BOLD,20));
c3.setForeground(Color.YELLOW);
c2=new JButton("清除");
c2.setFont(new Font("宋体",Font.BOLD,15));
text=new JTextArea();
}
private void layoutComponents()
{
//Container c=this.getContentPane();	
setLayout(new FlowLayout());
JPanel panel1=new JPanel();
panel1.add(a1);
panel1.add(b1);
JPanel panel2=new JPanel();
panel2.add(a2);
panel2.add(b2);
JPanel panel3=new JPanel();
panel3.add(a3);
panel3.add(b3);
JPanel panel4=new JPanel();
panel4.add(c1);
panel4.add(c3);
panel4.add(c2);
JPanel  leftpanel=new JPanel(new GridLayout(4,1));
leftpanel.add(panel1);
leftpanel.add(panel2);
leftpanel.add(panel3);
leftpanel.add(panel4);
JScrollPane panel5=new JScrollPane(text);
panel5.setPreferredSize(new Dimension(200,150));
add(leftpanel);
add(panel5);
}
 private  void registerHandlers()
 {
	 c1ActionEventHander hander1=new  c1ActionEventHander();
	 c1.addActionListener(hander1);
	 c2ActionEventHander hander2=new  c2ActionEventHander();
	 c2.addActionListener(hander2);
c3ActionEventHander hander3=new  c3ActionEventHander();
	c3.addActionListener(hander3);
	 
 }
private class c1ActionEventHander implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
	double principal;
	double amount;
	double rate;
    int n;
    NumberFormat currencyformatter=NumberFormat.getCurrencyInstance();
    String output="年"+"/t"+"复利存款"+"/n";
     int year =1;
     principal=Double.parseDouble(b1.getText());
     rate=Double.parseDouble(b2.getText()); 
     n=Integer.parseInt(b3.getText());
      while(year<=n)
      {
    	  amount=principal*Math.pow(1+rate,year);
    	  output+=String.valueOf(year)+"	"+currencyformatter.format(amount)+"
";
         year=year+1;
      }
     text.setText(output);
}
}
private class  c2ActionEventHander implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
	b1.setText("");
	b2.setText("");
	b3.setText("");
	text.setText("");
}
}
private class c3ActionEventHander implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
	b1.setText("");
	b2.setText("");
	b3.setText("");
}
}
public static void main(String[] args)
{
	 Interest frame=new Interest();
	frame.setVisible(true);
	frame.setSize(450,200); 
  frame.setResizable(false);
}
}

　

所用语言与工具：Java

代码行:85行

工作量（人时）：2.5个小时

估计完成4、5、6所需代码行与工作量大约要一个半小时，而实际工作量是约两小时。

在写代码的时候，主要问题是基础代码的不懂，还有一些函数不知道怎么运用，需要加强这方面的练习