013 anonymous class

Create objects of a standard format:

Name = new class name of the object class name ();

Anonymous object is the only object on the right, with no name on the left and the assignment operator.

Note: Objects can only use anonymous unique times, and then not the next no longer create a new object.

Suggested Use: if it is determined there is a need to use the object only once, you can use an anonymous object.

Anonymous object as a parameter:

import java.util.Scanner;

//匿名类作为参数
public class Demo01Anonymose {
    public static void main(String[] args) {
        methodParam(new Scanner(System.in));
    }
    public static  void methodParam(Scanner sc)
    {
        System.out.println("请输入一个数：");
        int a = sc.nextInt();
        System.out.println("你输入的数为：" + a);
    }
}

Anonymous object as a return value:

import java.util.Scanner;

public class Demo02Anonymose {
    public static void main(String[] args) {
        Scanner sc = methodReturn();
        System.out.println("请输入一个数：");
        int a = sc.nextInt();
        System.out.println("你输入的数为：" + a);
    }

    public static Scanner methodReturn()
    {
        return new Scanner(System.in);
    }
}