JAVA- clone

definition

A copy of an object, the object of cloning technology known as
the existence of a clone in class Object () method:
protected Object clone () throws CloneNotSupportedException
class if the object of a class want to be cloned, the object resides must implement Cloneable interface. This interface does not define any method, is a marker interface

step

1, the interface implemented Clonrable
2, override the clone method of the Object class

Examples

Description: create the copied object class that implements Clonrable interface and override the clone method in class Object

//实现Clonrable接口
public class Cat implements Cloneable {
    private String name;
    private int age;
    public Cat(String name, int age) {
        super();
        this.name = name;
        this.age = age;
    }
    public Cat() {
        super();
        // TODO Auto-generated constructor stub
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    @Override
    public String toString() {
        return "Cat [name=" + name + ", age=" + age + "]";
    }
    //重写Object中的clone方法
    @Override
    protected Object clone() throws CloneNotSupportedException {
        // TODO Auto-generated method stub
        return super.clone();
    }
}

Description: create an object that implements copy the class

public class Test {
    public static void main(String[]args) {
        Cat cat=new Cat("喵喵小白",2);
        try {
            Cat newCat=(Cat)cat.clone();
            System.out.println("cat"+cat);
            System.out.println("newCat"+newCat);
        } catch (CloneNotSupportedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

Run Results:
catcat [name = Meow white, age = 2]
newCatCat [name = Meow white, age = 2]