second.java

this is a program that allow the user enter the certain amount of money to convert into cents. This

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;


public class second
{
   public static void main(String[] args)
   {
      DemoSwingFrame frame = new DemoSwingFrame();
      frame.setTitle("DemoSwing");
      frame.pack();
      frame.show();
   }
}


class DemoSwingFrame extends JFrame implements ActionListener 
{   
    JLabel     num1Label;
	JLabel     num2Label;
	JLabel     ansLabel1;
	JLabel     ansLabel2;
	JLabel     ansLabel3;
	//Jlabel		
	JTextField num1;
	JTextField num2;
	JTextField answer1;
	JTextField answer2;
	JTextField answer3;
	JButton    addButton;
	
	
	public DemoSwingFrame()
   { 
   	    Container container = getContentPane();
		container.setLayout( new FlowLayout() );
		num1Label = new JLabel("Your Money:");
	//	num2Label = new JLabel("Number 2:");
		ansLabel1 = new JLabel("Your 50sen:");
		ansLabel2 = new JLabel("Your 20sen:");
		ansLabel3 = new JLabel("Your 10sen:");
		num1 = new JTextField( 8 );
	//num2 = new JTextField( 8 );
		answer1 = new JTextField( 8 );
		answer2 = new JTextField( 8 );
		answer3 = new JTextField( 8 );
		
		
		addButton = new JButton("         Calculate          ");
		container.add( num1Label );
		container.add( num1 );
		container.add( addButton );
		container.add( ansLabel1 );
		container.add( answer1 );
		container.add( ansLabel2 );
		container.add( answer2 );
		container.add( ansLabel3 );
		container.add( answer3 );
		addButton.addActionListener(this);
		
   }
   
   public void actionPerformed( ActionEvent event ) {
		String n1Str = num1.getText();
	//	String n2Str = num2.getText();
		double x = Double.parseDouble(n1Str);
		//double x = Double.parseDouble(n2Str);
		
		int x2= (int)(x*100);
		
	//	int n1 = Integer.parseInt(n1Str);
	//	int n2 = Integer.parseInt(n2Str);
	    int num1= x2 /50;
	     x2%=50;
			 
	    int num2= x2/20;
	     x2%=20;
			 
		 int num3= x2/10;

		answer1.setText( num1+"" );
		answer2.setText( num2+"" );
		answer3.setText( num3+"" );
	}
	
	private class WindowCloser extends WindowAdapter
   {
      public void windowClosing(WindowEvent event)
      {
         System.exit(0);
      }
   }
   
}