我如何打印年龄乘以3

Question

我希望年龄乘以3这是我的代码要求用户输入姓名和年龄......................... ......................

import java.util.Scanner;

class Lab1Part4 {

 public static void main (String [] args) {

Scanner user_input = 
    int tripleAge;
    String printMyName;
    String firstName;
    String secondName;

    System.out.println("Please enter your first name ? ");
    firstName = user_input.next ();

    System.out.println("Please enter your second name? ");
    secondName = user_input.next ();

    printMyName = firstName + " " + secondName;

    System.out.println( printMyName);

    System.out.println("Enter your age ? ");
    tripleAge = user_input.nextInt ();







}// end class

} //结束主要

Answer 1

您只需要执行以下操作：

tripleAge = user_input.nextInt () * 3;
System.out.println(tripleAge);

Answer 2

使用*运算符进行乘法运算。

tripleAge = (user_input.nextInt () * 3);
System.out.println(tripleAge);