Java: Course3

Scanner用法

1 .实现简单的控制台输入整型数据

import java.util.Scanner; //包

int money; //定义数据类型
Scanner input = new Scanner(System.in); //输入数据
money = input.nextint(); //接收输入的数据

例子

import java.util.Scanner;

public class Demo1_1 {
    public static void main(String args[]){
        double money, interest, sum;
        int year;
        System.out.println("接下来我们要计算存款利息,请输入本金");
        Scanner input1 = new Scanner(System.in);
        money = input1.nextDouble();
        System.out.println("请输入存款利息");
        Scanner input2 = new Scanner(System.in);
        interest = input2.nextDouble();
        System.out.println("请输入存款年数");
        Scanner input3 = new Scanner(System.in);
        year = input3.nextInt();
        sum = Math.pow(money*(1+interest), year);
        System.out.println("存款变为:" + sum + "\n获利:" + (sum - money));
    }
}