shapes.java

一个简单绘图程序

//********************************************************************
//  Shapes.java       Author: XieXing
//
//  Create a abstract class Shape.
//********************************************************************
import java.awt.*;

//形状抽象类
public abstract class Shapes extends Object 
{
   private int x1;
   private int y1;
   private int x2;
   private int y2;
   private Color strokeColor;

   // 构造函数开始
   public Shapes( int firstX, int firstY, int secondX, int secondY, 
      Color shapeColor )
   {
      setX1( firstX );
      setY1( firstY );
      setX2( secondX );
      setY2( secondY );
      setColor( shapeColor );

   } 

   // 设置左上角点X1值
   public final void setX1( int x )
   { 
      x1 = x;

   } 

   // 访问x1值
   public final int getX1() 
   { 
      return x1;

   }

   // 设置左上角点Y1值
   public final void setY1( int y ) 
   { 
      y1 = y;

   } 

   // 访问Y1值
   public final int getY1() 
   {
      return y1; 

   }

   // 设置右下角点X2值
   public final void setX2( int x ) 
   { 
      x2 = x; 

   }

   // 访问X2值
   public final int getX2()
   {
      return x2; 

   }

   // 设置右下角点Y2值
   public final void setY2( int y )
   { 
      y2 = y; 

   } 

   // 访问Y2值
   public final int getY2() 
   { 
      return y2; 

   }

   // 设置线型颜色
   public final void setColor( Color c ) 
   { 
      strokeColor = c; 

   }

   // 访问线型颜色
   public final Color getColor()
   { 
      return strokeColor;
      
   }

   // abstract draw 方法
   public abstract void draw( Graphics g );

}