How to get the value from each index?

I'm extremely new to Java and we're tasked to take random values of an array and pass them through a method where it adds all of them for a running total.

For the sumMethod I'd like to take each value from all the index (given by sizeOfArray) and add them together.

Thank you!

public static void sumMethod(double[] arrayOfDoubles){
   //How to get the value from each indexes (given by sizeOfArray) and add them for the sum
   int arrayLength = arrayOfDoubles.length;
         
        System.out.println(arrayOfDoubles);
   }

  public static void main(String[] args) {   
   //1-3: Set up Scanner object to collect user's input on the size of array.
      Scanner keyboard = new Scanner(System.in);
      System.out.println("How many double numerical entries do you have?");
   //4: Declare an array of size sizeOfArray
      int sizeOfArray = keyboard.nextInt();  
   
      //Initialize array
      double[] arrayOfDoubles;
      arrayOfDoubles = new double[sizeOfArray];   
   
      
      
   
      for(int i = 0; i < sizeOfArray; i++){
      //5: Use the Random number Class and walk over the array 
         Random randomNum = new Random();       
         arrayOfDoubles[i] = randomNum.nextDouble(0.0 , 100.0);
      //6: Invoke SumMethod
         sumMethod(arrayOfDoubles); 
      }
      
     
      
      
   }
}