How Can I Return Minimum Key Value of Array in Java?

To find the minimum key value in a Java array, you need to iterate through the array and keep track of the minimum value. Here’s an example using a simple array of integers:

public class MinimumKeyValue {
public static void main(String[] args) {
int[] array = {5, 2, 8, 1, 7};
int minKey = findMinimumKey(array);
System.out.println("Minimum key value: " + minKey);
public static int findMinimumKey(int[] array) {
if (array.length == 0) {
throw new IllegalArgumentException("Array is empty");
int minKey = array[0];
for (int i = 1; i < array.length; i++) {
if (array[i] < minKey) {
minKey = array[i];
return minKey;

In this example, the `findMinimumKey` method iterates through the array, updating the `minKey` variable whenever a smaller value is encountered. The initial assumption is that the first element of the array is the minimum, and the loop starts from the second element. The minimum key value is then returned.

You can adapt this code to work with arrays of other types or objects with key values as needed.