今天天气好晴朗处处好风光,好天气好开始,图老师又来和大家分享啦。下面给大家推荐Java关于克隆与“冷藏”和“解冻”方法,希望大家看完后也有个好心情,快快行动吧!
【 tulaoshi.com - 编程语言 】
  import Java.awt.Point;
  import java.io.IOException;
import com.sun.corba.se.impl.io.OptionalDataException;
  /**
   * 克隆测试br
   * 以方形类为例,比较了深克隆(deep clone)与浅克隆(shallow clone)的异同
   * 
   * @see #clone()
   * @author 88250
   * @version 1.0.0, 2007-8-26
   */
  public class CloneTester
  {
      private Square square = new Square();
private Square cpySquare = null;
      /**
       * 浅克隆操作
       */
      public void shallowClone()
      {
      square.setSideLength(2);
      square.setLocation(new Point(2, 5));
      // 浅克隆
      cpySquare = (Square) square.clone();
}
      /**
       * 深克隆操作
       */
      public void deepClone()
      {
      square.setSideLength(3);
      square.setLocation(new Point(1, 3));
      // 深克隆
      try
      {
          cpySquare = (Square) square.deepClone();
      }
      catch (OptionalDataException e)
      {
          e.printStackTrace();
      }
      catch (IOException e)
      {
          e.printStackTrace();
      }
      catch (ClassNotFoundException e)
      {
          e.printStackTrace();
      }
      }
      /**
       * 克隆结果输出
       */
      public void cloneDisplay()
      {
      System.out.println("原始方形长度:" + square.getSideLength());
      System.out.println("克隆方形长度:" + cpySquare.getSideLength());
System.out.println("原始方形==克隆方形?" + (square == cpySquare));
      System.out.println("原始方形的位置==克隆方形的位置?"
          + (square.getLocation() == cpySquare.getLocation()));
      }
      public static void main(String[] args)
      {
      CloneTester sm = new CloneTester();
      sm.shallowClone();
      sm.cloneDisplay();
      sm.deepClone();
      sm.cloneDisplay();
      }
  }
  
  import java.awt.Point;
  
     import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.io.Serializable;
import com.sun.corba.se.impl.io.OptionalDataException;
  /**
   * 正方形
   * 
   * @author 88250
   * @version 1.0.0, 2007-8-26
   */
  public class Square implements Cloneable, Serializable
  {
      private Point location = new Point(0, 0);
private float sideLength = 1F;
      @Override
      public Object clone()
      {
      Square tmp = null;
      try
      {
          tmp = (Square) super.clone();
      }
      catch (CloneNotSupportedException cnse)
      {
          cnse.printStackTrace();
      }
      finally
      {
          return tmp;
      }
      }
      
      /**
       * 深克隆方法
       * @return
       */
      public Object deepClone()
      throws IOException, OptionalDataException, ClassNotFoundException
      {
      // 首先将对象写到流里
      ByteArrayOutputStream bo = new ByteArrayOutputStream();
      ObjectOutputStream oo = new ObjectOutputStream(bo);
      oo.writeObject(this);
      
      // 然后将对象从流里读出来
      ByteArrayInputStream bi = new ByteArrayInputStream(bo.toByteArray());
      ObjectInputStream oi = new ObjectInputStream(bi);
      
      return (oi.readObject());
      }
      /**
       * @return the location
       */
      public Point getLocation()
      {
          return location;
      }
      /**
       * @param location the location to set
       */
      public void setLocation(Point location)
      {
          this.location = location;
      }
      /**
       * @return the sideLength
       */
      public float getSideLength()
      {
          return sideLength;
      }
      /**
       * @param sideLength the sideLength to set
  
          */
      public void setSideLength(float sideLength)
      {
          this.sideLength = sideLength;
      }
}
来源:http://www.tulaoshi.com/n/20160219/1622677.html
看过《Java关于克隆与“冷藏”和“解冻”方法》的人还看了以下文章 更多>>