java - 使用 Scanner 的简单 Java 程序中的编译错误

Question

import java.util.*;
public class strings {
    public static void main (String [] args) {
        Scanner keyboard = new Scanner(System.in);
        System.out.print("Type your first integer: ");
        int first = keyboard.next();
        System.out.print("Type your seconds integer : ");
        int second = keyboard.next();
        System.out.print("The sum of your two integers are:");
    }
}

我不知道为什么我在字符串上遇到 2 个错误，无法转换为 int。

Answer 1

keyboard.nextInt(); 

而不是

keyboard.next();

如果您想使用keyboard.next();，请将intfirst更改为Stringfirst。

将您的代码修改为:

import java.util.*;
public class Demo {
    public static void main (String [] args) {
        Scanner keyboard = new Scanner(System.in);
        System.out.print("Type your first integer: ");
        int first = keyboard.nextInt();

        System.out.print("Type your seconds integer : ");
        int second = keyboard.nextInt();

        System.out.print("The sum of your two integers are:" +(first+second));
    }
}

将类名更改为另一个而不是字符串。