java - The highest even number in a array

Java - The highest even number in a array

To find the highest even number in a Java array, you can use the following code:

public class HighestEvenNumber { public static void main(String[] args) { int[] numbers = {1, 5, 8, 3, 10, 6, 7, 12}; int highestEven = findHighestEven(numbers); System.out.println("The highest even number is: " + highestEven); } static int findHighestEven(int[] arr) { int highestEven = Integer.MIN_VALUE; for (int num : arr) { if (num % 2 == 0 && num > highestEven) { highestEven = num; } } return highestEven; } }

This program initializes an array of integers, then defines a method (findHighestEven) to iterate through the array and find the highest even number. The result is then printed to the console.

Examples

  1. "Java find highest even number in array"

    • Code:
      int[] array = {1, 5, 8, 3, 10, 6, 4}; int maxEven = Arrays.stream(array) .filter(num -> num % 2 == 0) .max() .orElseThrow(NoSuchElementException::new);
    • Description: Uses Java Streams to filter even numbers in the array and find the maximum among them.

  2. "Java find highest even number with custom comparator"

    • Code:
      int[] array = {1, 5, 8, 3, 10, 6, 4}; int maxEven = Arrays.stream(array) .filter(num -> num % 2 == 0) .boxed() .max(Comparator.naturalOrder()) .orElseThrow(NoSuchElementException::new);
    • Description: Converts the primitive array to boxed integers and uses a custom comparator to find the maximum even number.

  3. "Java find highest even number with Java 8 reduce"

    • Code:
      int[] array = {1, 5, 8, 3, 10, 6, 4}; int maxEven = Arrays.stream(array) .filter(num -> num % 2 == 0) .reduce(Integer.MIN_VALUE, Integer::max);
    • Description: Utilizes the reduce function with an identity value to find the maximum even number.

  4. "Java find highest even number without Streams"

    • Code:
      int[] array = {1, 5, 8, 3, 10, 6, 4}; int maxEven = Integer.MIN_VALUE; for (int num : array) { if (num % 2 == 0 && num > maxEven) { maxEven = num; } }
    • Description: Implements a traditional for loop to find the highest even number without using Java Streams.

  5. "Java find highest even number with Optional"

    • Code:
      int[] array = {1, 5, 8, 3, 10, 6, 4}; OptionalInt maxEvenOptional = Arrays.stream(array) .filter(num -> num % 2 == 0) .max(); int maxEven = maxEvenOptional.orElseThrow(NoSuchElementException::new);
    • Description: Uses OptionalInt to handle the possibility of no even numbers and throws an exception if none are found.

  6. "Java find highest even number using IntStream"

    • Code:
      int[] array = {1, 5, 8, 3, 10, 6, 4}; int maxEven = IntStream.of(array) .filter(num -> num % 2 == 0) .max() .orElseThrow(NoSuchElementException::new);
    • Description: Uses IntStream instead of Arrays.stream to directly work with primitive integers.

  7. "Java find highest even number with parallel stream"

    • Code:
      int[] array = {1, 5, 8, 3, 10, 6, 4}; int maxEven = Arrays.stream(array) .parallel() .filter(num -> num % 2 == 0) .max() .orElseThrow(NoSuchElementException::new);
    • Description: Applies parallel stream processing to potentially improve performance in finding the highest even number.

  8. "Java find highest even number with external library"

    • Code:
      int[] array = {1, 5, 8, 3, 10, 6, 4}; int maxEven = IntArrays.max(Arrays.stream(array) .filter(num -> num % 2 == 0) .toArray());
    • Description: Uses an external library (e.g., Apache Commons Lang) to find the maximum even number.

  9. "Java find highest even number with BitSet"

    • Code:
      int[] array = {1, 5, 8, 3, 10, 6, 4}; BitSet evenBits = new BitSet(); for (int num : array) { if (num % 2 == 0) { evenBits.set(num); } } int maxEven = evenBits.previousSetBit(evenBits.length() - 1);
    • Description: Utilizes a BitSet to mark even numbers and finds the highest even number.

  10. "Java find highest even number with custom method"

    • Code:
      int[] array = {1, 5, 8, 3, 10, 6, 4}; int maxEven = findHighestEven(array); // Custom method private static int findHighestEven(int[] arr) { int maxEven = Integer.MIN_VALUE; for (int num : arr) { if (num % 2 == 0 && num > maxEven) { maxEven = num; } } return maxEven; }
    • Description: Defines a custom method to encapsulate the logic for finding the highest even number.

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