object, as if by assignment; the contents of the fields are not themselves cloned. Thus, this method performs a "shallow copy" of this object, not a "deep copy" operation. The class Object does not itself implement the interface Cloneable, so calling the clone method on an object whose c...
private String name; private Bean bean; @Override public String toString() { return "DeepCopy hash is " + this.hashCode() + " ,{" + "age=" + age + ", count=" + count + ", name='" + name + '\'' + ", bean=" + bean + '}'; } } 1. 2. 3. 4. 5. 6. 7. 8. ...
address = address; } @Override public String toString() { return "Person{" + "name='" + name + '\'' + ", age=" + age + ", address=" + address + '}'; } } public class DeepCopyWithCommonsLang { public static void main(String[] args) { Address address = new Address("New ...
import java.io.*;import java.nio.ByteBuffer;import java.nio.MappedByteBuffer;import java.nio.channels.FileChannel;public class ZeroCopyMemoryMappedFileExample { public static void main(String[] args) throws IOException { File file = new File("data.txt"); String content = "This is the ...
person1 = Person@291caca8, person1.name = String@385e9564 person2 = Person@445b295b, person2.name = String@385e9564 可以看到,两个Person对象是不同的,但是它们引用的name是相同的。这就是浅拷贝。 深拷贝(Deep Copy) 深拷贝创建一个新的对象,并且递归地复制原始对象的所有字段和引用指向的对象,而...
{returnaddress;}public voidsetAddress(Address address){this.address=address;}}classAddress{private String country;private String city;publicAddress(String country,String city){this.country=country;this.city=city;}// getter和setter方法public StringgetCountry(){returncountry;}public voidsetCountry(String ...
对基本类型的变量进行拷贝非常简单,直接赋值给另外一个对象即可: 对于引用类型的变量(例如 String),情况稍微复杂一些,因为直接等号赋值只是复制了一份引用,而复制前后的两个引用指向的是内存中的同一个对象。 要想实现引用类型的拷贝,可以通过实现 Cloneable 接口,
/*clone方法实现浅拷贝*/publicclassShallowCopy {publicstaticvoidmain(String[] args) { Age a=newAge(20); Student stu1=newStudent("摇头耶稣",a,175);//通过调用重写后的clone方法进行浅拷贝Student stu2=(Student)stu1.clone(); System.out.println(stu1.toString()); ...
edu = edu; } public String str() { return name + "\n" + age + edu.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@d...
}public String getName() { return name; }public int getAge() { return age; } }现在我们有一个 List，其中包含了一些 Person 对象：java import java.util.ArrayList; import java.util.List;public class DeepCopyExample { public static void main(String[] args) { Listlist = n...