Intersect i rect samt icon i rect, Java.

import java.awt.Color;
import java.awt.Graphics;
import java.util.ArrayList;

public class Terrain 
{	
	public int x1, y1, x2, y2;
public Terrain(int x1, int y1, int x2, int y2) 
	{
	this.x1 = x1;
	this.y1 = y1;
	this.x2 = x2;
	this.y2 = y2;
	}
public void drawRect(Graphics g) 
	{
	g.setColor(Color.gray);
	g.fillRect(x1,y1,x2,y2);
	}
}