Java: Find the maximum and minimum value of an array

Last update on May 09 2025 12:48:39 (UTC/GMT +8 hours)

10. Find max and min in an array

Write a Java program to find the maximum and minimum value of an array.

Pictorial Presentation:

Sample Solution:

Java Code:

// Import the Arrays class from the java.util package.
import java.util.Arrays; 

// Define a class named Exercise10.
public class Exercise10 {
    
    // Declare static variables to store the maximum and minimum values.
    static int max;
    static int min;

    // Define a method to calculate the maximum and minimum values in the array.
    public static void max_min(int my_array[]) {
        // Initialize max and min with the first element of the array.
        max = my_array[0];
        min = my_array[0];
        int len = my_array.length;

        // Iterate through the array in pairs.
        for (int i = 1; i < len - 1; i = i + 2) {
            // Check if there's only one element left in the pair.
            if (i + 1 > len) {
                // Update max and min based on the single element.
                if (my_array[i] > max) max = my_array[i];
                if (my_array[i] < min) min = my_array[i];
            }

            // Compare and update max and min within the pair of elements.
            if (my_array[i] > my_array[i + 1]) {
                if (my_array[i] > max) max = my_array[i];
                if (my_array[i + 1] < min) min = my_array[i + 1];
            }
            if (my_array[i] < my_array[i + 1]) {
                if (my_array[i] < min) min = my_array[i];
                if (my_array[i + 1] > max) max = my_array[i + 1];
            }
        }
    }

    // The main method where the program execution starts.
    public static void main(String[] args) {
        // Declare and initialize an integer array 'my_array'.
        int[] my_array = {25, 14, 56, 15, 36, 56, 77, 18, 29, 49};
        
        // Call the max_min method to calculate the maximum and minimum values.
        max_min(my_array);
        
        // Print the original array using Arrays.toString() method.
        System.out.println("Original Array: " + Arrays.toString(my_array));
        
        // Print the maximum and minimum values.
        System.out.println("Maximum value for the above array = " + max);
        System.out.println("Minimum value for the above array = " + min);
    }
}

Sample Output:

Original Array: [25, 14, 56, 15, 36, 56, 77, 18, 29, 49]                                                     
 Maximum value for the above array = 77                                                                       
 Minimum value for the above array = 14 

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to find the second highest and second lowest values in an array.
• Write a Java program to find the largest and smallest element in an array without using sorting.
• Write a Java program to find the maximum and minimum sum of an array by excluding one element.
• Write a Java program to find the difference between the maximum and minimum values in an array.

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