Clone

 Clone:

              构建一个对象的时候，是不是一定要调用构造函数！

package com.edu.test; 

public class Zhenzhen implements Cloneable{

              public Zhenzhen(){

                            System.out.println("new Instance");

              }

              public String name;

              public String female;

               

              public static void main(String[] args) throws Exception {

                            Zhenzhen z = new Zhenzhen();

                            z.name="李珍";

                            z.female="女妖";

                             

                            Zhenzhen nz = (Zhenzhen)z.clone();

 

                             

                            System.out.println(nz.name+" "+nz.female);

                            System.out.println(z);

                            System.out.println(nz);

              }

}

 

Example:

               

              while(rs.next)(){

                            Userinfo info = new Userinfo();

                            info.setUname(rs.getString(2));

                            info.setUpass(rs.getString(3));

              }

 

 

 

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