How to Efficiently Find the Minimum and Maximum Values in a Java Primitive Array?

Finding the Maximum/Minimum Value in an Array of Primitives with Java

Determining the minimum or maximum value within an array is a common programming task. While it's straightforward to implement such a function manually, as demonstrated in the example, it's worth considering whether there are existing solutions.

For this purpose, the Apache Commons Lang library provides a convenient way to convert an array of primitives to an object array using the ArrayUtils.toObject() method. This allows us to leverage the Collections framework and utilize its min() and max() methods for finding the desired values.

An example of using this approach is illustrated below:

import java.util.Arrays;
import java.util.Collections;

import org.apache.commons.lang.ArrayUtils;

public class MinMaxValue {

    public static void main(String[] args) {
        char[] a = {'3', '5', '1', '4', '2'};

        List b = Arrays.asList(ArrayUtils.toObject(a));

        System.out.println(Collections.min(b));
        System.out.println(Collections.max(b));
    }
}

By utilizing Collections and converting the primitive array to an object array, we can efficiently find the minimum and maximum values with ease. Additionally, this approach is not memory-intensive and does not require a copy of the underlying array elements.

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