java - 调用一个java方法，询问用户公司的员 worker 数(无参数，返回值> = 0)

Question

每当用户输入负数时，我想在 else 中显示该语句，我知道这个 while 循环将是无限循环，但我不知道如何打破它。我尝试输入“break”，但显示错误:

need a return statement.

我应该只使用 if 语句还是编写正确的代码？

import java.util.Scanner;
class number{
    public static void main(String[] args){
        workers();
        int numEmployee;
    }
    public static int workers(){
        System.out.println("How many employees do you have?");

        Scanner input = new Scanner(System.in);
        int number = input.nextInt();

        int numEmployee;
        while(true){
            if(number >= 0){
                numEmployee = number;
                return numEmployee;
            }else{
                System.out.println("Please enter a positive number");
            }
        }
    }
}

Answer 1

建议更改:

import java.util.Scanner;

// Always capitalize your public class name (and the corresponding source file)
public class Number{

  public static void main(String[] args){
    // Get #/employees
    int numEmployee = Number.workers();
    System.out.println ("#/employees=" + numEmployee);
  }

  public static int workers(){
    // Loop until we get a valid number
    int number;
    do {
      System.out.println("How many employees do you have?");  
      Scanner input = new Scanner(System.in);
      number = input.nextInt();
    } while (number <= 0)

    // Return the final value
    return number;
  }
}