Question

I wrote a method that takes a int array as parameter then returns the largest entry of the array!

That’s what I did, but it didn’t work!

The only error is with largest();

The method largest(int[]) in the type Moon is not applicable for the arguments ()

What is the problem?

public class Moon {
    public static void main(String[] args {     
        int array1[] = {5,10,15,20,25,30};

        int max = largest();
        System.out.println("the largest number is : " + max);

    }


    static int largest( int array1[] ){

        int maxValue = 0;

        for (int i = 0; i < array1.length; i++){
            if (array1[i] > array1[maxValue]) maxValue = i;       
        }
        return maxValue;
    } 
}

Answer 1

1. Call largest by passing the array as :

   int max = largest(array1);
   

2. Initialize your max with Integer.MIN_VALUE as:

   int maxValue = Integer.MIN_VALUE;
   

3. Change your comparison as:

   if (array1[i] > maxValue )         
      maxValue = array1[i];         
   }