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Java代碼

1. package com.test;   
2.   
3. //淺復制（淺克?。? 淺復制僅僅復制所考慮的對象，而不復制它所引用的對象。   
4. //深復制（深克?。荷顝椭瓢岩獜椭频膶ο笏玫膶ο蠖紡椭屏艘槐?。   
5. //   
6. //Java中對象的克隆,為了獲取對象的一份拷貝，我們可以利用Object類(lèi)的clone()方法。必須要遵循下面三點(diǎn)   
7. //1.在派生類(lèi)中覆蓋基類(lèi)的clone()方法，并聲明為public【Object類(lèi)中的clone()方法為protected的】。   
8. //2.在派生類(lèi)的clone()方法中，調用super.clone()。   
9. //3.在派生類(lèi)中實(shí)現Cloneable接口。   
10.   
11. //<SPAN style="COLOR: red">Object類(lèi)里的clone方法是淺復制（淺克?。?lt;/SPAN>public class CloneTest {   
12.   
13.     public static void main(String[] args) throws Exception{   
14.         //teacher對象將被clone出來(lái)的Student對象共享.   
15.         Teacher teacher = new Teacher();   
16.         teacher.setAge(40);   
17.         teacher.setName("Teacher zhang");   
18.            
19.         Student student1 = new Student();   
20.         student1.setAge(20);   
21.         student1.setName("zhangsan");   
22.         student1.setTeacher(teacher);   
23.            
24.         //復制出來(lái)一個(gè)對象student2   
25.         Student student2 = (Student)student1.clone();   
26.         System.out.println(student2.getAge());   
27.         System.out.println(student2.getName());   
28.            
29.            
30.         System.out.println("~~~~~~~~~~~~~~~~~~~~~~");   
31.         System.out.println(student1.getTeacher().getAge());   
32.         System.out.println(student1.getTeacher().getName());   
33.            
34.            
35.         //修改student2的引用對象   
36.         student2.getTeacher().setAge(50);   
37.         student2.getTeacher().setName("Teacher Li");   
38.            
39.         System.out.println("~~~~~~~~~~~~~~~~~~~~~~");   
40.         System.out.println(student1.getTeacher().getAge());   
41.         System.out.println(student1.getTeacher().getName());   
42.     }   
43. }   
44.   
45. class Teacher {   
46.     public int age;   
47.     public String name;   
48.        
49.     public int getAge() {   
50.         return age;   
51.     }   
52.     public void setAge(int age) {   
53.         this.age = age;   
54.     }   
55.     public String getName() {   
56.         return name;   
57.     }   
58.     public void setName(String name) {   
59.         this.name = name;   
60.     }   
61.        
62.        
63. }   
64.   
65. class Student implements Cloneable{   
66.        
67.     public int age ;   
68.     public String name;   
69.     public Teacher teacher;   
70.     public int getAge() {   
71.         return age;   
72.     }   
73.     public void setAge(int age) {   
74.         this.age = age;   
75.     }   
76.     public String getName() {   
77.         return name;   
78.     }   
79.     public void setName(String name) {   
80.         this.name = name;   
81.     }   
82.     public Teacher getTeacher() {   
83.         return teacher;   
84.     }   
85.     public void setTeacher(Teacher teacher) {   
86.         this.teacher = teacher;   
87.     }   
88.     @Override  
89.     public Object clone() throws CloneNotSupportedException {   
90.         return super.clone();   
91.     }   
92.        
93.        
94. }   
95. 輸出結果為：   
96. 20  
97. zhangsan   
98. ~~~~~~~~~~~~~~~~~~~~~~   
99. 40  
100. Teacher zhang   
101. ~~~~~~~~~~~~~~~~~~~~~~   
102. 50  
103. Teacher Li  

package com.test;//淺復制（淺克?。? 淺復制僅僅復制所考慮的對象，而不復制它所引用的對象。//深復制（深克?。荷顝椭瓢岩獜椭频膶ο笏玫膶ο蠖紡椭屏艘槐?。////Java中對象的克隆,為了獲取對象的一份拷貝，我們可以利用Object類(lèi)的clone()方法。必須要遵循下面三點(diǎn)//1.在派生類(lèi)中覆蓋基類(lèi)的clone()方法，并聲明為public【Object類(lèi)中的clone()方法為protected的】。//2.在派生類(lèi)的clone()方法中，調用super.clone()。//3.在派生類(lèi)中實(shí)現Cloneable接口。//Object類(lèi)里的clone方法是淺復制（淺克?。?/span>public class CloneTest {public static void main(String[] args) throws Exception{//teacher對象將被clone出來(lái)的Student對象共享.Teacher teacher = new Teacher();teacher.setAge(40);teacher.setName("Teacher zhang");Student student1 = new Student();student1.setAge(20);student1.setName("zhangsan");student1.setTeacher(teacher);//復制出來(lái)一個(gè)對象student2Student student2 = (Student)student1.clone();System.out.println(student2.getAge());System.out.println(student2.getName());System.out.println("~~~~~~~~~~~~~~~~~~~~~~");System.out.println(student1.getTeacher().getAge());System.out.println(student1.getTeacher().getName());//修改student2的引用對象student2.getTeacher().setAge(50);student2.getTeacher().setName("Teacher Li");System.out.println("~~~~~~~~~~~~~~~~~~~~~~");System.out.println(student1.getTeacher().getAge());System.out.println(student1.getTeacher().getName());}}class Teacher {public int age;public String name;public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}}class Student implements Cloneable{public int age ;public String name;public Teacher teacher;public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Teacher getTeacher() {return teacher;}public void setTeacher(Teacher teacher) {this.teacher = teacher;}@Overridepublic Object clone() throws CloneNotSupportedException {return super.clone();}}輸出結果為：20zhangsan~~~~~~~~~~~~~~~~~~~~~~40Teacher zhang~~~~~~~~~~~~~~~~~~~~~~50Teacher Li

Java代碼

1.   
2. package com.test1;   
3.   
4. //深clone   
5. public class DeepCloneTest {   
6.   
7.     public static void main(String[] args) throws Exception{   
8.         //teacher對象將不被clone出來(lái)的Student對象共享.   
9.         Teacher teacher = new Teacher();   
10.         teacher.setAge(40);   
11.         teacher.setName("Teacher zhang");   
12.            
13.         Student student1 = new Student();   
14.         student1.setAge(20);   
15.         student1.setName("zhangsan");   
16.         student1.setTeacher(teacher);   
17.            
18.         //復制出來(lái)一個(gè)對象student2   
19.         Student student2 = (Student)student1.clone();   
20.         System.out.println(student2.getAge());   
21.         System.out.println(student2.getName());   
22.            
23.            
24.         System.out.println("~~~~~~~~~~~~~~~~~~~~~~");   
25.         System.out.println(student1.getTeacher().getAge());   
26.         System.out.println(student1.getTeacher().getName());   
27.            
28.            
29.         //修改student2的引用對象   
30.         student2.getTeacher().setAge(50);   
31.         student2.getTeacher().setName("Teacher Li");   
32.            
33.         System.out.println("~~~~~~~~~~~~~~~~~~~~~~");   
34.         System.out.println(student1.getTeacher().getAge());   
35.         System.out.println(student1.getTeacher().getName());   
36.     }   
37. }   
38.   
39. class Teacher implements Cloneable{   
40.     public int age;   
41.     public String name;   
42.        
43.     public int getAge() {   
44.         return age;   
45.     }   
46.     public void setAge(int age) {   
47.         this.age = age;   
48.     }   
49.     public String getName() {   
50.         return name;   
51.     }   
52.     public void setName(String name) {   
53.         this.name = name;   
54.     }   
55.     @Override  
56.     public Object clone() throws CloneNotSupportedException {   
57.         return super.clone();   
58.     }   
59.        
60. }   
61.   
62. class Student implements Cloneable{   
63.        
64.     public int age ;   
65.     public String name;   
66.     public Teacher teacher;   
67.     public int getAge() {   
68.         return age;   
69.     }   
70.     public void setAge(int age) {   
71.         this.age = age;   
72.     }   
73.     public String getName() {   
74.         return name;   
75.     }   
76.     public void setName(String name) {   
77.         this.name = name;   
78.     }   
79.     public Teacher getTeacher() {   
80.         return teacher;   
81.     }   
82.     public void setTeacher(Teacher teacher) {   
83.         this.teacher = teacher;   
84.     }   
85.     @Override  
86.     public Object clone() throws CloneNotSupportedException {   
87.         Student student = (Student)super.clone();   
88.         //將引用的對象teacher也clone下   
89.         student.setTeacher((Teacher)(student.getTeacher().clone()));   
90.         return student;   
91.     }   
92.        
93.        
94. }   
95. 輸出結果為：   
96. 20  
97. zhangsan   
98. ~~~~~~~~~~~~~~~~~~~~~~   
99. 40  
100. Teacher zhang   
101. ~~~~~~~~~~~~~~~~~~~~~~   
102. 40  
103. Teacher zhang  

package com.test1;//深clonepublic class DeepCloneTest {public static void main(String[] args) throws Exception{//teacher對象將不被clone出來(lái)的Student對象共享.Teacher teacher = new Teacher();teacher.setAge(40);teacher.setName("Teacher zhang");Student student1 = new Student();student1.setAge(20);student1.setName("zhangsan");student1.setTeacher(teacher);//復制出來(lái)一個(gè)對象student2Student student2 = (Student)student1.clone();System.out.println(student2.getAge());System.out.println(student2.getName());System.out.println("~~~~~~~~~~~~~~~~~~~~~~");System.out.println(student1.getTeacher().getAge());System.out.println(student1.getTeacher().getName());//修改student2的引用對象student2.getTeacher().setAge(50);student2.getTeacher().setName("Teacher Li");System.out.println("~~~~~~~~~~~~~~~~~~~~~~");System.out.println(student1.getTeacher().getAge());System.out.println(student1.getTeacher().getName());}}class Teacher implements Cloneable{public int age;public String name;public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}@Overridepublic Object clone() throws CloneNotSupportedException {return super.clone();}}class Student implements Cloneable{public int age ;public String name;public Teacher teacher;public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Teacher getTeacher() {return teacher;}public void setTeacher(Teacher teacher) {this.teacher = teacher;}@Overridepublic Object clone() throws CloneNotSupportedException {Student student = (Student)super.clone();//將引用的對象teacher也clone下student.setTeacher((Teacher)(student.getTeacher().clone()));return student;}}輸出結果為：20zhangsan~~~~~~~~~~~~~~~~~~~~~~40Teacher zhang~~~~~~~~~~~~~~~~~~~~~~40Teacher zhang

Java代碼

1. package com.test3;   
2.   
3. import java.io.ByteArrayInputStream;   
4. import java.io.ByteArrayOutputStream;   
5. import java.io.ObjectInputStream;   
6. import java.io.ObjectOutputStream;   
7. import java.io.Serializable;   
8. //利用序列化來(lái)做深復制   
9. //深clone   
10. public class DeepCloneTest {   
11.   
12.     public static void main(String[] args) throws Exception{   
13.         //teacher對象將不被clone出來(lái)的Student對象共享.   
14.         Teacher teacher = new Teacher();   
15.         teacher.setAge(40);   
16.         teacher.setName("Teacher zhang");   
17.            
18.         Student student1 = new Student();   
19.         student1.setAge(20);   
20.         student1.setName("zhangsan");   
21.         student1.setTeacher(teacher);   
22.            
23.         //復制出來(lái)一個(gè)對象student2   
24.         Student student2 = (Student)student1.deepCopy();   
25.         System.out.println(student2.getAge());   
26.         System.out.println(student2.getName());   
27.            
28.            
29.         System.out.println("~~~~~~~~~~~~~~~~~~~~~~");   
30.         System.out.println(student1.getTeacher().getAge());   
31.         System.out.println(student1.getTeacher().getName());   
32.            
33.            
34.         //修改student2的引用對象   
35.         student2.getTeacher().setAge(50);   
36.         student2.getTeacher().setName("Teacher Li");   
37.            
38.         System.out.println("~~~~~~~~~~~~~~~~~~~~~~");   
39.         System.out.println(student1.getTeacher().getAge());   
40.         System.out.println(student1.getTeacher().getName());   
41.     }   
42. }   
43.   
44. class Teacher implements Serializable{   
45.        
46.     private static final long serialVersionUID = -8834559347461591191L;   
47.        
48.     public int age;   
49.     public String name;   
50.        
51.     public int getAge() {   
52.         return age;   
53.     }   
54.     public void setAge(int age) {   
55.         this.age = age;   
56.     }   
57.     public String getName() {   
58.         return name;   
59.     }   
60.     public void setName(String name) {   
61.         this.name = name;   
62.     }   
63.        
64. }   
65.   
66. class Student implements Serializable{   
67.        
68.     //serialVersionUID 如果你的對象序列化后存到硬盤(pán)上面后，可是后來(lái)你卻更改了類(lèi)的field(增加或減少或改名)，當你反序列化時(shí)，就會(huì )出現Exception的，這樣就會(huì )造成不兼容性的問(wèn)題。    
69.     //但當serialVersionUID相同時(shí)，它就會(huì )將不一樣的field以type的缺省值賦值(如int型的是0,String型的是null等)，這個(gè)可以避開(kāi)不兼容性的問(wèn)題。所以最好給serialVersionUID賦值   
70.     private static final long serialVersionUID = 7991552226614088458L;   
71.        
72.     public int age ;   
73.     public String name;   
74.     public Teacher teacher;   
75.     public int getAge() {   
76.         return age;   
77.     }   
78.     public void setAge(int age) {   
79.         this.age = age;   
80.     }   
81.     public String getName() {   
82.         return name;   
83.     }   
84.     public void setName(String name) {   
85.         this.name = name;   
86.     }   
87.     public Teacher getTeacher() {   
88.         return teacher;   
89.     }   
90.     public void setTeacher(Teacher teacher) {   
91.         this.teacher = teacher;   
92.     }   
93.        
94.     public Object deepCopy() throws Exception{   
95.         //將該對象序列化成流,因為寫(xiě)在流里的是對象的一個(gè)拷貝，而原對象仍然存在于JVM里面。所以利用這個(gè)特性可以實(shí)現對象的深拷貝   
96.         ByteArrayOutputStream bos = new ByteArrayOutputStream();   
97.   
98.         ObjectOutputStream oos = new ObjectOutputStream(bos);   
99.   
100.         oos.writeObject(this);   
101.   
102.         //將流序列化成對象   
103.         ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());   
104.   
105.         ObjectInputStream ois = new ObjectInputStream(bis);   
106.   
107.         return ois.readObject();   
108.     }   
109.        
110.        
111. }   
112. 輸出結果為：   
113. 20  
114. zhangsan   
115. ~~~~~~~~~~~~~~~~~~~~~~   
116. 40  
117. Teacher zhang   
118. ~~~~~~~~~~~~~~~~~~~~~~   
119. 40  
120. Teacher zhang