java 문자를 아스키로 변환

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

class askii
{
	static public void main(String args[])
	{
		JFrame myframe = new JFrame();
		
		Container contentPane=myframe.getContentPane();
		
		JPanel panel = new JPanel(new GridLayout(2,1));
		JPanel panel1 = new JPanel();
		JPanel panel1_1 = new JPanel(new GridLayout());
		JPanel panel1_2 = new JPanel();
		JPanel panel1_3= new JPanel();
		JPanel panel2= new JPanel();
		
		JLabel label1 = new JLabel("입력");
		JTextField input = new JTextField(15);
		JTextField output = new JTextField(20); 
		JButton click = new JButton("변환");
		
		panel.add(panel1);
		panel.add(panel2);
		
		panel1.add(panel1_1);
		panel1.add(panel1_2);
		panel1.add(panel1_3);
		
		panel1_1.add(label1);
		panel1_2.add(input);
		panel1_3.add(click);
		
		panel2.add(output);
		
		contentPane.add(panel);

//		myframe.add(contentPane);
		
		myframe.setVisible(true);
		myframe.setSize(350, 150);
	}
}