shape.java

能够画线条、圆和长方形的Java程序

import java.awt.Color;
import java.awt.Graphics;

@SuppressWarnings("unchecked")
public abstract class Shape implements Comparable{	
	
	private boolean visible = true;
	private static Color backgroundColor;
	
	abstract public void draw(Graphics g);  
	
	public void setVisible(boolean vis){
		visible = vis;
	}
	
	public boolean isVisible() {
		return visible;
	}
	
	public static Color getBackgroundColor() {
		return backgroundColor;
	}

	public static void setBackgroundColor(Color backGrndColor) {
		backgroundColor = backGrndColor;
	}

	
	abstract public int compareTo(Object arg0); 		
	
}