rectangle.java

java语言实现的一个画图小程序,可以实现绘图

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package drawfigure;
import java.awt.Color;
class Rectangle extends Shape{//矩形类，继承了正方形类
  public Rectangle(){}
  public Rectangle(int sx,int sy,int x,int y,Color c,boolean f){
    super(sx,sy,x,y,c);fill=f;i=3;
  }
  void setValue(int sx,int sy,int x,int y,Color c,boolean f){
    super.setValue(sx,sy,x,y,c);fill=f;i=3;
  }
    @Override
  void draw(){ 
    x0=x>sx?sx:x;y0=y>sy?sy:y;
    g.setColor(c);
    g.setPaintMode();
    if(!fill)
    {
     g.drawRect(x0,y0,Math.abs(x-sx),Math.abs(y-sy));
     }
    else
     {
       g.fillRect(x0,y0,Math.abs(x-sx),Math.abs(y-sy));
     }
  }
    @Override
  void wipe()
    {
      x0=x>sx?sx:x;y0=y>sy?sy:y;
     g.setXORMode(back);
    if(!fill)
    {
     g.drawRect(x0,y0,Math.abs(x-sx),Math.abs(y-sy));
     }
    else
     {
       g.fillRect(x0,y0,Math.abs(x-sx),Math.abs(y-sy));
     }
     }
}