1、什么叫Java浅拷贝?
浅拷贝是会将对象的每一个属性举行顺次复制,然则当对象的属性值是援用范例时,本质复制的是其援用,当援用指向的值转变时也会随着变化。
2、什么叫Java深拷贝?
深拷贝复制变量值,关于援用数据,则递归至基本范例后,再复制。深拷贝后的对象与本来的对象是完整断绝的,互不影响,对一个对象的修正并不会影响另一个对象。
相干视频教程引荐:java在线视频
3、Java浅拷贝和深拷贝的区分是什么?
浅显来说浅拷贝的复制其援用,当援用指向的值转变时也会随着变化;而深拷贝则是与本来的对象完整断绝,互补影响。
4、头脑导图
5、测试用例剖析
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,我通晓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,我通晓Java,C++"); cloneTest.show(); test.show(); System.out.println(cloneTest.getAge()); } } //运转效果 ======浅拷贝====== 我是小明,我通晓Java,C++的复制粘贴 我是小明,我通晓Java,C++的复制粘贴 我是小明的副本,我通晓Java,C++ 我是小明的副本,我通晓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,我通晓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,我通晓Java,C++"); cloneTest.show(); test.show(); System.out.println(cloneTest.getAge()); } } //运转效果 ======深拷贝====== 我是小明,我通晓Java,C++的复制粘贴 我是小明,我通晓Java,C++的复制粘贴 我是小明的副本,我通晓Java,C++ 我是小明,我通晓Java,C++的复制粘贴 10
相干文章教程引荐:java零基本入门
以上就是java中的浅拷贝与深拷贝的细致内容,更多请关注ki4网别的相干文章!