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java中的浅拷贝和深拷贝是什么？二者有什么区别？这些问题可能是我们日常工作会见到的。通过这些问题，希望你能收获更多。下面是揭开这些问题的详细内容。
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1、什么叫Java浅拷贝？
浅拷贝是会将对象的每个属性进行依次复制，但是当对象的属性值是引用类型时，实质复制的是其引用，当引用指向的值改变时也会跟着变化。
2、什么叫Java深拷贝？
深拷贝复制变量值，对于引用数据，则递归至基本类型后，再复制。深拷贝后的对象与原来的对象是完全隔离的，互不影响，对一个对象的修改并不会影响另一个对象。
3、Java浅拷贝和深拷贝的区别是什么？
通俗来讲浅拷贝的复制其引用，当引用指向的值改变时也会跟着变化；而深拷贝则是与原来的对象完全隔离，互补影响。
4、思维导图
5、测试用例分析
浅拷贝测试用例
public class ShallowExperience {
private String skill;
public void setSkill(String skill) {
this.skill = skill;
}
public void setShallowExperience(String skill) {
this.skill = skill;
}
@Override
public String toString() {
return skill;
}
}
public class ShallowCloneTest implements Cloneable {
private int age;
private ShallowExperience shallowExperience;
public ShallowCloneTest() {
this.age = 10;
this.shallowExperience = new ShallowExperience();
}
public ShallowExperience getExperience() {
return shallowExperience;
}
public void setShallowExperience(String skill) {
shallowExperience.setShallowExperience(skill);
}
public void show() {
System.out.println(shallowExperience.toString());
}
public int getAge() {
return age;
}
@Override
protected Object clone() throws CloneNotSupportedException {
return (ShallowCloneTest) super.clone();
}
}
public class TestMain {
public static void main(String[] args) throws CloneNotSupportedException {
System.out.println("======浅拷贝======");
shallowCloneTest();
}
/**
* 浅拷贝测试用例
*
* @throws CloneNotSupportedException
*/
private static void shallowCloneTest() throws CloneNotSupportedException {
ShallowCloneTest test = new ShallowCloneTest();
test.setShallowExperience("我是小明，我精通Java，C++的复制粘贴");
test.show();
ShallowCloneTest cloneTest = (ShallowCloneTest) test.clone();
cloneTest.show();
cloneTest.setShallowExperience("我是小明的副本，我精通Java,C++");
cloneTest.show();
test.show();
System.out.println(cloneTest.getAge());
}
}
//运行结果
======浅拷贝======
我是小明，我精通Java，C++的复制粘贴
我是小明，我精通Java，C++的复制粘贴
我是小明的副本，我精通Java,C++
我是小明的副本，我精通Java,C++
10深拷贝测试用例
public class DeepExperience implements Cloneable{
private String skill;
public void setSkill(String skill) {
this.skill = skill;
}
public void setDeepExperience(String skill) {
this.skill = skill;
}
@Override
public String toString() {
return skill;
}
@Override
protected Object clone() throws CloneNotSupportedException {
return super.clone();
}
}
public class DeepCloneTest implements Cloneable {
private int age;
private DeepExperience deepExperience;
public DeepCloneTest() {
this.age = 10;
this.deepExperience = new DeepExperience();
}
public DeepExperience getExperience() {
return deepExperience;
}
public void setDeepExperience(String skill) {
deepExperience.setDeepExperience(skill);
}
public void show() {
System.out.println(deepExperience.toString());
}
public int getAge() {
return age;
}
@Override
protected Object clone() throws CloneNotSupportedException {
DeepCloneTest deepCloneTest = (DeepCloneTest) super.clone();
deepCloneTest.deepExperience = (DeepExperience) deepCloneTest.getExperience().clone();
return deepCloneTest;
}
}
public class TestMain {
public static void main(String[] args) throws CloneNotSupportedException {
System.out.println("======深拷贝======");
deepCloneTest();
}
/**
* 深拷贝测试用例
*
* @throws CloneNotSupportedException
*/
private static void deepCloneTest() throws CloneNotSupportedException {
DeepCloneTest test = new DeepCloneTest();
test.setDeepExperience("我是小明，我精通Java，C++的复制粘贴");
test.show();
DeepCloneTest cloneTest = (DeepCloneTest) test.clone();
cloneTest.show();
cloneTest.setDeepExperience("我是小明的副本，我精通Java,C++");
cloneTest.show();
test.show();
System.out.println(cloneTest.getAge());
}
}
//运行结果
======深拷贝======
我是小明，我精通Java，C++的复制粘贴
我是小明，我精通Java，C++的复制粘贴
我是小明的副本，我精通Java,C++
我是小明，我精通Java，C++的复制粘贴
10到此为止, 关于java中的浅拷贝和深拷贝有了一个基础的认识, 但是对于具体的使用方法还是需要多加巩固和练习，如果想了解更多相关内容，请关注创新互联行业资讯。