java - 错误: cannot find symbol; symbol: variable keyBoard

Question

我有这段代码并尝试编译它。但它给了我

error: cannot find symbol

anotherEntry = keyBoard.nextInt();

symbol: variable keyBoard

location: class DemoVariables3

知道为什么吗？

代码:

import java.util.Scanner;

public class DemoVariables3
{
 public static void main(String[] args)
  {
     int entry;
     int anotherEntry;
     System.out.print("Enter another integer ");
     anotherEntry = keyBoard.nextInt();
     System.out.print("The other entry is ");
     System.out.println(anotherEntry);
     System.out.println(entry + "plus" +
    anotherEntry + "is" + (entry + anotherEntry));
  }
}

Answer 1

在尝试使用变量 keyBoard 之前，您需要创建一个名为 keyBoard 的变量并将其分配给新的 Scanner 对象:

Scanner keyBoard = new Scanner(System.in);