java克隆测试

1.person类

 1 //clone方法必须实现Cloneable接口
 2 public class Person implements Cloneable {
 3     private String name;
 4     private int age;
 5     public Calendar calendar;
 6 
 7     public Person() {
 8     }
 9 
10     // 构造方法
11     public Person(String name, int age, Calendar calendar) {
12         this.name = name;
13         this.age = age;
14         this.calendar = calendar;
15     }
16 
17     @Override
18     public Person clone() throws CloneNotSupportedException {
19         Person cloned = (Person) super.clone();// 浅层克隆
20         cloned.calendar = (Calendar) calendar.clone();// 深度克隆，克隆属性
21         return cloned;
22     }
23 
24     @Override
25     public String toString() {// 重写toString方法
26         return "Person  [ name = " + name + " |  age = " + age + " | Calendar = " + calendar.getTime() + " ]";
27     }
28 
29     public Calendar getCalendar() {
30         return calendar;
31     }
32 
33     public void setCalendar(Calendar calendar) {
34         this.calendar = calendar;
35     }
36 
37     public String getName() {
38         return name;
39     }
40 
41     public void setName(String name) {
42         this.name = name;
43     }
44 
45     public int getAge() {
46         return age;
47     }
48 
49     public void setAge(int age) {
50         this.age = age;
51     }
52 
53 }

2.克隆测试

 1 //克隆测试
 2 public class CloneTest00 {
 3     public static void main(String[] args) throws CloneNotSupportedException {
 4         Calendar now = Calendar.getInstance();
 5         Person p1 = new Person("Tim", 18, now);
 6         Person p2 = p1.clone();
 7         p2.setName("danny");
 8         p2.setAge(11);
 9         p2.calendar.set(2000, 11, 11);
10         System.out.println("p2 = " + p2.toString());
11         System.out.println("p1 = " + p1.toString());
12     }
13 }// 改变p2的值，不会改变p1的值

3.非克隆测试

 1 //非克隆测试
 2 public class NotCloneTest00 {
 3     public static void main(String[] args) {
 4         Calendar now = Calendar.getInstance();
 5         Person p1 = new Person("Tim", 18, now);
 6         Person p2 = p1;
 7         p2.setName("danny");
 8         p2.setAge(11);
 9         p2.calendar.set(2000, 11, 11);
10         System.out.println("p2 = " + p2.toString());
11         System.out.println("p1 = " + p1.toString());
12     }
13 }// 改变p2的值，p1的值跟随改变