scrollpanetest.java

来自「JAVA 2应用开发指南」· Java 代码 · 共 23 行

import java.text.NumberFormat;
import java.util.Locale;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
public class ScrollPaneDemo {
    public static void main( String args[] )
    {
         double amount, principal = 1000.0, rate = 0.05;
         NumberFormat moneyFormat = NumberFormat.getCurrencyInstance( Locale.US );
         JTextArea outputTextArea = new JTextArea();
         outputTextArea.setText( "Year\tAmount on deposit\n" );
         for ( int year = 1; year <= 10; year++ ) {
            amount = principal * Math.pow( 1.0 + rate, year );
            outputTextArea.append( year + "\t" +
            moneyFormat.format( amount ) + "\n" );
         }  // end for structure
         JOptionPane.showMessageDialog( null, outputTextArea,
            "Compound Interest", JOptionPane.INFORMATION_MESSAGE );
         System.exit( 0 );  
      }  // end method main
 }
}