我对Java很新,我试图做一个基本的计算器。还有另一个问题,但我改变了固定它的东西,但它仍然不起作用。这里是我的代码:Java简单的计算器错误
import java.util.Scanner;
class HelloWorld{
public static void main(String args[])
int num1;
int num2;
String op;
Scanner input = new Scanner(System.in);
System.out.println("Enter your first number");
num1 = input.nextInt();
System.out.println("Enter your second number");
num2 = input.nextInt();
System.out.println("Enter the operation");
op = input.nextLine();
if (op.equals("*")){
System.out.println("The answer is: " + (num2 * num1));
}
if (op.equals("/")){
System.out.println("The answer is: " + (num2/num1));
}
if (op.equals("+")){
System.out.println("The answer is: " + (num2 + num1));
}
if (op.equals("-")){
System.out.println("The answer is: " + (num2 - num1));
}
}
}
错误说:
Enter your first number
Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Scanner.java:907)
at java.util.Scanner.next(Scanner.java:1530)
at java.util.Scanner.nextInt(Scanner.java:2160)
at java.util.Scanner.nextInt(Scanner.java:2119)
at HelloWorld.main(HelloWorld.java:12)
我似乎无法找到什么是错(我有其简单的东西,我错过了)
为什么你需要第二个'Scanner'?哪一行是'12'? –
此错误适用于'HelloWorld'应用程序的'main()'方法。 –
我不认为我这样做。我摆脱了它,但它给了我同样的错误。 – minipanda1