When we want to copy an object in Java, there are two possibilities that we need to consider,a shallow copy and a deep copy. For the shallow copy approach, we only copy field values, therefore the copy might be dependant on the original object. In the deep copy approach, we make sure...
// 测试代码publicclassMain{publicstaticvoidmain(String[]args){Addressaddress=newAddress("New York");Personperson1=newPerson("John",address);Personperson2=DeepCloneUtil.deepClone(person1);// 修改 person2 的地址person2.getAddress().city="Los Angeles";System.out.println(person1);System.out.print...
User user = newUser("大山", address);// 调用构造函数时进行深拷贝User copyUser = newUser(user.getName(), newAddress(address.getCity(),address.getCountry()));// 修改源对象的值user.getAddress().setCity("深圳");// 检查两个对象的值不同assertNotSame(user.getAddress().getCity(), copyUse...
Java中的拷贝可以分为深拷贝(Deep Copy)、浅拷贝(Shallow Copy)和引用拷贝(Reference Copy)。它们之间的区别如下: 浅拷贝: 只复制对象本身,而不复制对象包含的子对象。新旧对象之间共享子对象的引用,即新对象和原始对象中的子对象指向同一个内存地址。 浅拷贝:使用clone()方法或者Object类的copy()方法。 深拷贝: ...
java deep copy //deep copy 1、可以对每个成员变量赋值的方式重新将对象的成员值指向新的地址值(比如string),不能整个对象一起赋值(=),这样是引用了对象的地址值,修改应用对象时,被引用的也修改了 2、 使用工具类 BeanUtils.copyProperties(pifuList1.get(i),bpStation);...
第二种是将对象序列化为json,通过json来实现拷贝,这种方式需要用到net.sf.json.JSONObject。 具体代码如下: public class DeepCopy { /** * 深层拷贝 * * @param <T> * @param obj * @return * @throws Exception */ public static <T> T copy(T obj) throws Exception { ...
to 100copy[2] = 100// while all the items in the second element willcopy[1].items = ['21', '22', '23']// and if you update a string inside the object// that will be changed too as it's inside an objectcopy[1].name = 'Updated name 2'console.log('updated', copy)console...
toString(); } @Override protected Object clone() throws CloneNotSupportedException { return super.clone(); } } 再次运行刚才的程序, 打印如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 daily.javacopy.Person@d44fc21 daily.javacopy.Edu@23faf8f2 huyanshi 18daily.javacopy.Edu@23faf8f2...
Java中的拷贝可以分为深拷贝(Deep Copy)、浅拷贝(Shallow Copy)和引用拷贝(Reference Copy)。它们之间的区别如下: 浅拷贝:只复制对象本身,而不复制对象包含的子对象。新旧对象之间共享子对象的引用,即新…
For all mutable field members, we must create a new object of member and assign its value to cloned object. The idea is to return animmutable copyof the class fromclone()method. Checkout the overriddenclone()method in the following class: ...