Finding the max/min value in an array of primitives using Java

Question

It\'s trivial to write a function to determine the min/max value in an array, such as:

/**
 * 
 * @param chars
 * @return the max value in the array of chars         


        

Answer 1

You could easily do it with an IntStream and the max() method.

Example

public static int maxValue(final int[] intArray) {
  return IntStream.range(0, intArray.length).map(i -> intArray[i]).max().getAsInt();
}

Explanation

1. range(0, intArray.length) - To get a stream with as many elements as present in the intArray.

2. map(i -> intArray[i]) - Map every element of the stream to an actual element of the intArray.

3. max() - Get the maximum element of this stream as OptionalInt.

4. getAsInt() - Unwrap the OptionalInt. (You could also use here: orElse(0), just in case the OptionalInt is empty.)