Java Array Methods

Java's Arrays class in the java.util package offers a range of static methods facilitating operations on arrays. It provides functionality to fill, sort, search, and more. The methods enhance array manipulation, contributing to cleaner and more efficient code.

Let's examine the operations provided by the Arrays class by reviewing its methods presented below in a tabular format.

Implementation:

Example 1

In the following program, we have used the asList(), binarySearch(), compare(), and the compareUnsigned() method.

Filename: ArrayMethodsExample1.java

Output:

Original Array: [1, 4, 7, 10, 13]
Index of 7: 2
Index of 10 in range [1, 4]: 3
Comparison result between array1 and array2: 0
Unsigned comparison result between unsignedArray1 and unsignedArray2: 1

Example 2

In the following program, we have used the copyOf(), copyOfRange(), deepEquals(), deepHashCode(), and deepToString() method.

Filename: ArrayMethodsExample2.java

Output:

Copy of originalArray with new length: [1, 2, 3, 4, 5, 0, 0]
Copy of originalArray from index 1 to 4: [2, 3, 4]
Are array1 and array2 deepEquals? true
Deep hash code of array1: 30848
Deep string representation of array1: [[1, 2, 3]]

Example 3

In the following program, we have used the equals(), fill(), hashCode(), mismatch(), and parallelSort() method.

Filename: ArrayMethodsExample3.java

Output:

Are array1 and array2 equal? true
Filled array with value 7: [7, 7, 7, 7, 7]
Hash code of the array: 35309286
Mismatch index between mismatchArray1 and mismatchArray2: 3
Sorted array using parallelSort: [1, 2, 3, 4, 5]

Example 4

In the following program, we have used the various types of the sort() method and the spliterator method.

Filename: ArrayMethodsExample4.java

Output:

Sorted array using sort(): [1, 2, 3, 4, 5]
Partially sorted array from index 1 to 4: [5, 1, 3, 4, 2]
Sorted string array by length: [Apple, Banana, Orange, Grapes]
Sorted array in reverse order: [5, 4, 3, 2, 1]
Spliterator characteristics: 17488

Example 5

In the following program, we have used the spliterator(), stream(), and the toString() method.

Filename: ArrayMethodExample5.java

Output:

Spliterator characteristics: 17488
IntStream from originalArray: 
1
2
3
4
5
String representation of originalArray: [1, 2, 3, 4, 5]