Arrays are fundamental in Java, and understanding their operations and methods simplifies data handling. Java’s Arrays class provides additional functionalities to manage arrays efficiently.
| Method | Description | Example |
|---|---|---|
Arrays.sort(arr) |
Sorts the array in ascending order | Arrays.sort(arr); |
Arrays.binarySearch(arr, key) |
Searches for a key in a sorted array (Binary Search) | Arrays.binarySearch(arr, 20); |
Arrays.fill(arr, value) |
Fills the entire array with a specific value | Arrays.fill(arr, 5); |
Arrays.copyOf(arr, newLength) |
Copies an array to a new length | int[] newArr = Arrays.copyOf(arr, 5); |
Arrays.copyOfRange(arr, from, to) |
Copies a range of elements from an array | int[] subArr = Arrays.copyOfRange(arr, 1, 4); |
Arrays.toString(arr) |
Converts an array into a string representation | System.out.println(Arrays.toString(arr)); |
Arrays.equals(arr1, arr2) |
Compares two arrays for equality | Arrays.equals(arr1, arr2); |
Arrays.deepEquals(arr1, arr2) |
Compares multi-dimensional arrays for equality | Arrays.deepEquals(arr1, arr2); |
Arrays.asList(arr) |
Converts an array to a List (only for objects) | List<String> list = Arrays.asList(arr); |
Arrays.hashCode(arr) |
Returns hash code of the array | int hash = Arrays.hashCode(arr); |
Arrays.deepHashCode(arr) |
Returns hash code for multi-dimensional arrays | int hash = Arrays.deepHashCode(arr); |
Arrays.stream(arr) |
Converts array to a stream for operations | IntStream stream = Arrays.stream(arr); |
Arrays.setAll(arr, i -> i * 2) |
Modifies elements based on a lambda function | Arrays.setAll(arr, i -> i * 2); |
Arrays.parallelSort(arr) |
Sorts large arrays using parallel sorting | Arrays.parallelSort(arr); |
Arrays.spliterator(arr) |
Creates a Spliterator for an array | Spliterator<Integer> s = Arrays.spliterator(arr); |
