Summary 2 hands-on brain

Hands-on brain 1: Random Number

package Test;

import java.util.Scanner;
import java.util.Random;

public class Test {
    public static void main(String[] args) {
        Random ra =new Random();
        Scanner input=new Scanner(System.in);
        int n=input.nextInt();
        for(int i=1;i<=n;i++) {
            int a=ra.nextInt(100)+1;
            System.out.println(a);
        }
    }
}

You can generate random numbers, but about being part no repeat of things right, and then have to continue access to information for this purpose.

Hands-on brain 2: observe the following code

This piece of code, which has two methods, although the different types, but call square.

This involves a method of overload

Same as (1) a method name; product
(2) different types of parameters, number of different parameters, different parameters or the type of order.

A plurality method satisfies these two conditions can overload, the return value as a determination condition is not a method of method overloading.