显然是扫描仪导入问题

Question

import java.util.Scanner;
public class JavaApplication1 {
    public static void main (String[] args)
    {
        System.out.println ("You will be prompted to enter the lengths of your triangle, do this in no particular order");
        *Scanner sc = new.Scanner(System.in);
    }
}

为什么我在标记的Scanner行上收到错误？我已经做过无数次了。它一直告诉我它需要一个标识符。这是怎么回事？

Answer 1

它应该是

Scanner sc = new Scanner(System.in);

不

Scanner sc = new.Scanner(System.in); // . is invalid

.应该用空格代替。 也没有*

Answer 2

我犯了一个简单的错误。更正后的代码是：

import java.util.Scanner;
public class JavaApplication1 {
public static void main (String[] args)
{
    System.out.println ("You will be prompted to enter the lengths of your triangle, do this in no particular order");
    Scanner sc = new Scanner(System.in);
}