70 problem

/*
 * File: practice.java
 * Name:
 * Section Leader:
 * --------------------
 * This file is the starter file for the Hailstone problem.
 */

import acm.graphics.GCanvas;
import acm.graphics.GLabel;
import acm.graphics.GLine;
import acm.program.*;
import java.util.*;
import java.awt.event.*;
import javax.swing.*;

public class Practice extends GraphicsProgram implements ComponentListener {
	public void init() {
		addComponentListener(this);
		draw((double) getWidth()/8,(double) getHeight()/8);
	}

	private void draw (double w,double h) {
		for (int i=0;i<7;i++) {
			GLine a = new GLine(w*(i+1),0,w*(i+1),getHeight());
			add(a);
		}
		for (int i=0;i<7;i++) {
			GLine b = new GLine(0,h*(i+1),getWidth(),h*(i+1));
			add(b);
		}
	}

	public void componentHidden(ComponentEvent e) {}
	public void componentResized(ComponentEvent e) {
		removeAll();
		draw((double) getWidth()/8,(double) getHeight()/8);
	}
	public void componentShown(ComponentEvent e) {}
	public void componentMoved(ComponentEvent e) {}

	private JTextField text;
	private int cursorX = 10;
	private int cursorY = 10;
	private int firstIndex=0;
	ArrayList <String> list = new ArrayList <String>();
}