How to find the index of an element in an int array?

Question

How can I find an index of a certain value in a Java array of type int?

I tried using Arrays.binarySearch on my unsorted array, it only som

Answer 1

The easiest way is to iterate. For example we want to find the minimum value of array and it's index:

public static Pair getMinimumAndIndex(int[] array) {
        int min = array[0];
        int index = 0;
        for (int i = 1; i < array.length; i++) {
            if (array[i] < min) {
                min = array[i];
                index = i;
            }

            return new Pair;

This way you test all array values and if some of them is minimum you also know minimums index. It can work the same with searching some value:

public static int indexOfNumber(int[] array) {
        int index = 0;
        for (int i = 0; i < array.length; i++) {
            if (array[i] == 77) {        // here you pass some value for example 77
                index = i;
            }
        }
        return index;
    }