jfdimension.java

来自「用Java开发的、实现类似Visio功能的应用程序源码」· Java 代码 · 共 177 行

/**
 *    $Id:JFDimension.java $
 *
 *    Copyright 2004 ~ 2005  JingFei International Cooperation LTD. All rights reserved. *
 */
package com.jfimagine.jfgraph.geom;


 
 /**
 * JFDimension class.  A class used to represent a dimension in the plane with double values. 
 *
 * @author     CookieMaker    
 *
 * @version $Revision: 1.00 $
 */  
 public class JFDimension implements Cloneable{

  
   /**
    *   height of this dimension.
    */
   private	double	m_height	=0;

   /**
    *   width of this dimension.
    */
   private	double	m_width		=0;


   /**
    *   Get height of this dimension.
    *
    *   @return  The height.
    *
    */ 	
   public double getHeight(){
   	return m_height;
   }

   /**
    *   Set height of this dimension.
    *
    *   @param val  A new height.
    *
    */ 	
   public void setHeight(double val){
   	m_height	=val;
   }

   /**
    *   Get width of this dimension.
    *
    *   @return  The width.
    *
    */ 	
   public double getWidth(){
   	return m_width;
   }

   /**
    *   Set width of this dimension.
    *
    *   @param val  A new width.
    *
    */ 	
   public void setWidth(double val){
   	m_width	=val;
   }
	
   /**
    *   Constructor for JFDimension.
    *   Default to 0 for height and width.
    *
    */ 	
   public JFDimension(){
   	m_width		=0;
   	m_height	=0;
   }

   /**
    *   Constructor for JFDimension.
    *
    *   @param width  Width of this dimension.
    *
    *   @param height  Height of this dimension.
    *
    */ 	
   public JFDimension(double width, double height){
   	m_width		=width;
   	m_height	=height;
   }

   /**
    *   Constructor for JFDimension.
    *
    *   @param pnt A JFDimension.
    *
    */ 	
   public JFDimension(JFDimension pnt){
   	if (pnt!=null){
   		m_width		=pnt.getWidth();
   		m_height	=pnt.getHeight();
   	}
   }

   /**
    *   Convert this object to String 
    * 
    *   @return  An string represents the content of the object
    *
    */ 	
   public String toString(){
  	StringBuffer buf =new StringBuffer();
  	buf.append(";width=");  	buf.append(m_width);
  	buf.append(";height=");  	buf.append(m_height);
  	
  	return buf.toString();
   }

 
   /**
    *   Creates a new object of the same class and with the same contents as this object.
    * 
    *   @return  A clone of this instance.
    *
    */ 	
  public Object clone() throws CloneNotSupportedException{
  	try{
  		return new JFDimension(this);
  		
	}catch(Exception e){
		throw new CloneNotSupportedException(e.getMessage());
	}
  }


   /**
    *   Returns the hashcode for this Object.
    * 
    *   @return hash code for this Point2D.
    *
    */ 	
  public int hashCode(){
       	
  	long  x   =Double.doubleToLongBits(m_height);
  	long  y   =Double.doubleToLongBits(m_width);
  	
  	return 	(int)(x ^ (x >>> 32)) ^ (int)(y ^ (y >>> 32));
  }


   /**
    *   Determines whether or not two objects are equal. 
    * 
    * 	@param obj  an object to be compared with this object 
    * 
    *   @return true if the object to be compared is an instance of Port and has the same values; false otherwise.
    *
    */ 	
  public boolean equals(Object obj){

      if (obj == this)
             	return true;

      if (!(obj instanceof JFDimension))
            	return false;

      JFDimension	pnt	=(JFDimension)obj;
      
      return	(m_width==pnt.getWidth()) && (m_height==pnt.getHeight());
  }




}