rectanglefigure.java

来自「Java实例入门」· Java 代码 · 共 20 行

package drawfigure;

import java.awt.*;

public class RectangleFigure extends Figure implements Cloneable{
  public Object clone(){
    RectangleFigure rectFigure = new RectangleFigure();
    rectFigure.startPoint = (Point)startPoint.clone();
    rectFigure.endPoint = (Point)endPoint.clone();
    rectFigure.firstDraw = firstDraw;
    return rectFigure;
  }

  public void draw(Graphics g){
    int x = startPoint.x ,y = startPoint.y;
    if(endPoint.x < startPoint.x) x = endPoint.x;
    if(endPoint.y < startPoint.y) y = endPoint.y;
    g.drawRect(x,y,Math.abs(endPoint.x - startPoint.x),Math.abs(endPoint.y - startPoint.y));
  }
}