利息的计算(JTextArea和NumberFOrmat的用法)
程序结果:
原文件:
//calculate copmound interest
import java.text.NumberFormat;
import java.util.Locale;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;

public class Interest...{
//main method
public static void main(String args[])...{
double amount,principal=100.0,rate=0.05;
NumberFormat moneyFormat=NumberFormat.getCurrencyInstance(Locale.US);
JTextArea outputTextArea=new JTextArea();
outputTextArea.setText("year Amount on deposit ");
for(int year=1;year<=10;year++)
...{
amount=principal*Math.pow(1.0+rate,year);
outputTextArea.append(year+" "+moneyFormat.format(amount)+" ");
}
JOptionPane.showMessageDialog(null,outputTextArea,"Compound interest",JOptionPane.INFORMATION_MESSAGE);
System.exit(0);
}
}

复利计算器
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