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Program: How to compare two arrays and confirm they are equal?


Java Arrays class provides few utility methods. One of the utility method Arrays.deepEquals() helps us to compare two arrays. This method compares the array objects each other, and returns true if both arrays are holding same objects. Below example shows how to compare two arrays.

package com.java2novice.arrays;

import java.util.Arrays;

public class MyArrayDeepEquals {

	public static void main(String a[]){
		String[] strArr = {"JAVA", "C++", "PERL", "STRUTS", "PLAY"};
		String[] strArrCopy = {"JAVA", "C++", "PERL", "STRUTS", "PLAY"};
		System.out.println("Are strArr and strArrCopy same? "
					+Arrays.deepEquals(strArr, strArrCopy));
		String[] strArrMod = {"JAVA", "C++", "PERL", "STRUTS"};
		System.out.println("Are strArr and strArrMod same? "
					+Arrays.deepEquals(strArr, strArrMod));

Are strArr and strArrCopy same? true
Are strArr and strArrMod same? false
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Class, Constructor and Primitive data types
Class is a template for multiple objects with similar features and it is a blue print for objects. It defines a type of object according to the data the object can hold and the operations the object can perform. Constructor is a special kind of method that determines how an object is initialized when created. Primitive data types are 8 types and they are: byte, short, int, long, float, double, boolean, char.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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