java学习笔记（八）

package com.mytest.demo1;
import java.util.Scanner;
public class Rnumber {
    public static void main(String[] args) {
        System.out.println("please input the number :");
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
//        int[] j;
        int g = num%10;
        int s = num/10%10;
        int b = num/10/10%10;
        System.out.println("个位数是："+g);
        System.out.println("十位数是："+s);
        System.out.println("百位数是："+b);
        System.out.println(System.getProperty("file.encoding"));
//        for (int i = 0 ; i < 3 ; i++ ){
//            System.out.println(i);
//        }
    }
}

package com.mytest.demo1;
import java.util.Scanner;
public class hello {
    //快速指令psvm
    public static void main(String[] args) {
        //sout
        System.out.println("hello,this is my world,please input number what you want :");
        //输入number语句
        Scanner sc = new Scanner(System.in);
        int  i = sc.nextInt();
        System.out.println(i);
    }
}

0 111 1111 =127
1 111 1111 =-127