Java Code Example: Edit/compare multiple arrays

This code defines a class ArrayMethodsExample that demonstrates various methods provided by the java.util.Arrays class.

The main method first initializes several arrays and demonstrates some of the methods of the Arrays class.

• The method Arrays.fill() fills the specified range of elements in an array with a specified value. In this case, the range of elements from 0 to 2 in the array myFirstArray is filled with the value 5.
• The method Arrays.sort() sorts an array in ascending order. In this case, the myFirstArray is sorted.
• The method Arrays.asList().contains() checks if the specified element exists in an array. In this case, it checks if the element “a” exists in the myFourthArray.
• The method Arrays.toString() returns a string representation of an array. In this case, it returns the string representation of the myThirdArray.
• The method Arrays.copyOfRange() creates a new array that is a copy of a specified range of elements from an existing array. In this case, it creates a copy of the elements from the myThirdArray starting from index 0 to 10.
• The method Arrays.equals() compares two arrays and returns true if they contain the same elements in the same order. In this case, it compares the mySecondArray and myThirdArray and returns true if they are the same.

import java.util.Arrays;

public class ArrayMethodsExample {
	public static void main(String[] args) {
		int[] myFirstArray = { 1, 2, 3, 4 };
		int[] mySecondArray = { 5, 6, 7, 8 };
		int[] myThirdArray = { 5, 6, 7, 8 };
		String[] myFourthArray = { "a", "b", "c", "d" };


		boolean isSame = Arrays.equals(mySecondArray, myThirdArray);
		boolean inArray = Arrays.asList(myFourthArray).contains("a");

		System.out.print("Fill Array: ");
		Arrays.fill(myFirstArray, 0, 2, 5);
		for (int i = 0; i < myFirstArray.length; i++) {
			System.out.print(myFirstArray[i]);
		}

		System.out.print("\nSorted Array: ");
		Arrays.sort(myFirstArray);
		for (int i = 0; i < myFirstArray.length; i++) {
			System.out.print(myFirstArray[i]);
		}

		System.out.println("\ncontains: " + inArray);
		System.out.println("array as string: " + Arrays.toString(myThirdArray));
		System.out.println("length before copyOfRange: " + myThirdArray.length);
		myThirdArray = Arrays.copyOfRange(myThirdArray, 0, 10);
		System.out.println("length after copyOfRange: " + myThirdArray.length);
		System.out.println("equals: " + isSame);

	}
}

Output

Fill Array: 5534
Sorted Array: 3455
contains: true
array as string: [5, 6, 7, 8]
length before copyOfRange: 4
length after copyOfRange: 10
equals: true