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

/*
<applet code="Graph.class" width="200" height="100">
</applet>
 */

public class Graph2 extends JApplet implements ActionListener {
  int[] is = {};
  JTextField input;
  Color[] cs = {Color.RED, Color.BLUE};
  int scale = 15;

  @Override
  public void init() {
    input = new JTextField("", 16);
    input.addActionListener(this);
    setLayout(new FlowLayout());
    add(input);
  }  

  @Override
  public void paint(Graphics g) {
    super.paint(g);
    int i;
    int n = is.length;

    for (i = 0; i < n; i++) {
      g.setColor(cs[i % 2]);
      g.fillRect(0, i * scale + 30, is[i] * scale, scale);
    }
  }

  public void actionPerformed(ActionEvent e) {
    String[] args = input.getText().split(" ");
    int n = args.length;
    is = new int[n];

    int i;
    for (i = 0; i < n; i++) {
      is[i] = Integer.parseInt(args[i]);
    }
    repaint();
  }

  public static void main(String[] args) {
    JFrame frame = new JFrame("");
    JApplet applet = new Graph2();
    applet.setPreferredSize(new Dimension(200, 100));
    frame.add(applet);
    frame.pack();
    frame.setVisible(true);
    applet.init();
    applet.start();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
}