How to get the Index of Specified Element in an Array in Java - Step by Step Examples

How to get the Index of Specified Element in an Array in Java ?

Answer

To find the index of a specified element in a Java array, you can use a simple for loop to iterate through the array and check each element.

✐ Examples

1 Find Index of Element in Integer Array

In this example,

We create an integer array named arr with a set of values.
We specify the element we want to find the index of, storing it in the variable target.
We initialize a variable named index to store the index of the target element and set it to -1 (indicating the element is not found initially).
We use a for loop to iterate over the array indices. For each index i, we check if arr[i] equals the target element.
If we find the target element, we set index to i and break out of the loop.
Finally, we print the value of index to the standard output.

Java Program

public class Main {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3, 4, 5};
        int target = 3;
        int index = -1;
        for (int i = 0; i < arr.length; i++) {
            if (arr[i] == target) {
                index = i;
                break;
            }
        }
        System.out.println("Index of element is: " + index);
    }
}

Output

Index of element is: 2

2 Find Index of Element in String Array

In this example,

We create a string array named arr with a set of string values.
We specify the element we want to find the index of, storing it in the variable target.
We initialize a variable named index to store the index of the target element and set it to -1 (indicating the element is not found initially).
We use a for loop to iterate over the array indices. For each index i, we check if arr[i] equals the target element.
If we find the target element, we set index to i and break out of the loop.
Finally, we print the value of index to the standard output.

Java Program

public class Main {
    public static void main(String[] args) {
        String[] arr = {"apple", "banana", "cherry", "date"};
        String target = "banana";
        int index = -1;
        for (int i = 0; i < arr.length; i++) {
            if (arr[i].equals(target)) {
                index = i;
                break;
            }
        }
        System.out.println("Index of element is: " + index);
    }
}

Output

Index of element is: 1

Summary

In this tutorial, we learned How to get the Index of Specified Element in an Array in Java language with well detailed examples.

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How to get the Index of Specified Element in an Array in Java - Step by Step Examples

How to get the Index of Specified Element in an Array in Java ?

Answer

✐ Examples

1 Find Index of Element in Integer Array

Java Program

Output

2 Find Index of Element in String Array

Java Program

Output

Summary

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