Android Utililty Methods Array Index Of

List of utility methods to do Array Index Of

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Description

The list of methods to do Array Index Of are organized into topic(s).

Method

intindexOf(Object[] array, Object obj)
index Of 
for (int i = 0; i < array.length; ++i) {
    if (obj == array[i]) {
        return i;
throw new NoSuchElementException("" + obj);
intindexOf(Object[] array, Object objectToFind)

Finds the index of the given object in the array.

This method returns #INDEX_NOT_FOUND (-1) for a null input array.

return indexOf(array, objectToFind, 0);
intindexOf(Object[] array, Object objectToFind, int startIndex)

Finds the index of the given object in the array starting at the given index.

This method returns #INDEX_NOT_FOUND (-1) for a null input array.

A negative startIndex is treated as zero. 

if (array == null) {
    return INDEX_NOT_FOUND;
if (startIndex < 0) {
    startIndex = 0;
if (objectToFind == null) {
    for (int i = startIndex; i < array.length; i++) {
...
intindexOf(T e, T[] array)
index Of 
for (int i = 0; i != array.length; ++i) {
    if (array[i].equals(e))
        return i;
return -1;
intindexOf(boolean[] array, boolean valueToFind)

Finds the index of the given value in the array.

This method returns #INDEX_NOT_FOUND (-1) for a null input array.

return indexOf(array, valueToFind, 0);
intindexOf(boolean[] array, boolean valueToFind, int startIndex)

Finds the index of the given value in the array starting at the given index.

This method returns #INDEX_NOT_FOUND (-1) for a null input array.

A negative startIndex is treated as zero. 

if (ArrayUtils.isEmpty(array)) {
    return INDEX_NOT_FOUND;
if (startIndex < 0) {
    startIndex = 0;
for (int i = startIndex; i < array.length; i++) {
    if (valueToFind == array[i]) {
...
intindexOf(byte[] array, byte valueToFind)

Finds the index of the given value in the array.

This method returns #INDEX_NOT_FOUND (-1) for a null input array.

return indexOf(array, valueToFind, 0);
intindexOf(byte[] array, byte valueToFind, int startIndex)

Finds the index of the given value in the array starting at the given index.

This method returns #INDEX_NOT_FOUND (-1) for a null input array.

A negative startIndex is treated as zero. 

if (array == null) {
    return INDEX_NOT_FOUND;
if (startIndex < 0) {
    startIndex = 0;
for (int i = startIndex; i < array.length; i++) {
    if (valueToFind == array[i]) {
...
intindexOf(char[] array, char valueToFind)

Finds the index of the given value in the array.

This method returns #INDEX_NOT_FOUND (-1) for a null input array.

return indexOf(array, valueToFind, 0);
intindexOf(char[] array, char valueToFind, int startIndex)

Finds the index of the given value in the array starting at the given index.

This method returns #INDEX_NOT_FOUND (-1) for a null input array.

A negative startIndex is treated as zero. 

if (array == null) {
    return INDEX_NOT_FOUND;
if (startIndex < 0) {
    startIndex = 0;
for (int i = startIndex; i < array.length; i++) {
    if (valueToFind == array[i]) {
...