circle.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 Circle extends Shape{//定义圆类，继承了形状类
  public Circle(){}
  public Circle(int sx,int sy,int x,int y,Color c,boolean f){
    super(sx,sy,x,y,c);fill=f;i=2;
  }
  void setValue(int sx,int sy,int x,int y,Color c,boolean f){
    super.setValue(sx,sy,x,y,c);fill=f;i=2;
  }
    @Override
  void draw()
  {
    x0=x>sx?sx:x;y0=y>sy?sy:y;
    g.setColor(c);
    g.setPaintMode();
    if(!fill)
    {
     g.drawOval(x0,y0,Math.abs(x-sx),Math.abs(y-sy));
     }
    else
     { 
       g.fillOval(x0,y0,Math.abs(x-sx),Math.abs(y-sy));
     }
  }
  void wipe()
  {
    x0=x>sx?sx:x;y0=y>sy?sy:y;
    g.setXORMode(back);                
    if(!fill)
    {
     g.drawOval(x0,y0,Math.abs(x-sx),Math.abs(y-sy));
     }
    else
     { 
       g.fillOval(x0,y0,Math.abs(x-sx),Math.abs(y-sy));
     }
   }
}