java - 我在最后一行 "cannot find symbol"之一中收到错误

Question

我不断收到错误消息，说找不到该符号，我已经查看过，但不知道哪里出了问题。它将打印一个包含用户输入的数字的数组，然后从那里找出他们输入的最大数字是多少。

class Soutar_maximumvalue{

  public static void main (String[] args){
    //Welcome
    System.out.println ("Welcome to Matthew's program to find the maximum number.");

    max();

    //Goodbye
    System.out.println ("Thank you for using my program.");
   }

  public static void max(){
   //Variable Declaration
  double userinput1, userinput2, userinput3, userinput4, userinput5;
  double [] max;
   Scanner First = new Scanner(System.in);
   //Input
   System.out.println ("Please enter your first number.");
   userinput1 = First.nextDouble();
   System.out.println ("Please enter your second number.");
   userinput2 = First.nextDouble();
   System.out.println ("Please enter your third number.");
   userinput3 = First.nextDouble();
   System.out.println ("Please enter your fourth number.");
   userinput4 = First.nextDouble();
   System.out.println ("Please enter your fifth number.");
   userinput5 = First.nextDouble();

   max = new double [5];
   max[0] = userinput1;
   max[1] = userinput2;
   max[2] = userinput3;
   max[3] = userinput4;
   max[4] = userinput5;
   System.out.println( Arrays.toString( max ) );

   System.out.println (Math.max(userinput1,userinput2,userinput3,userinput4,userinput5));  // This is the line with the error
  }
}

Answer 1

Math.max 在 java 中不是可变参数。它需要两个参数

解决方案是更换

Math.max(userinput1,userinput2,userinput3,userinput4,userinput5)

与

Collections.max(Arrays.asList(max))

感谢您刚刚创建的数组。