oval.java

一个简单绘图程序

//********************************************************************
//  Oval.java       Author: XieXing
//
//  Creat a Oval subclass.
//********************************************************************
import java.awt.*;

public class Oval extends Shapes
{
   // 构造函数
   public Oval( int firstX, int firstY, int secondX, int secondY, 
      Color shapeColor )
   {
      super( firstX, firstY, secondX, secondY, shapeColor );

   }

   // 画椭圆方法，覆盖抽象类draw方法
   public void draw( Graphics g )
   {
      int upperLeftX = Math.min( getX1(), getX2() );
      int upperLeftY = Math.min( getY1(), getY2() );
      int width = Math.abs( getX1() - getX2() );
      int height = Math.abs( getY1() - getY2() );

      g.setColor( getColor() );
      g.drawOval( upperLeftX, upperLeftY, width, height );

   }

}