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How To Return An Array In Java

Last Updated : Jul 1, 2023

How To Return An Array In Java

In this article we will show you the solution of how to return an array in java, a data structure known as an array consists of a collection of identically typed items where each piece is uniquely recognised by an array index or key.

Now let's discuss the idea of returning an array in Java.

Step By Step Guide On How To Return An Array In Java :-

The array's items are organised so that, using a straightforward mathematical relationship, the location of the array's first index can be used to determine any element's address.

Although they share many similarities with their C/C++ counterparts, Java arrays differ from their C/C++ counterparts in terms of implementation and usage.

Occasionally, a method will return a reference to an array. A method's return type must be specified as an array with the appropriate data type.

The following considerations must be made in order for Java to return an array:

Keypoint 1:

The method returning the array must return an array with the same data type as the array itself.

The standard Integer, Double, Character, String, and user-defined class objects are among the possible return types.

Keypoint 2:

Access modifiers must be used correctly, taking into account how the method will be utilised and the array it will return.

Declarations that are static and non-static must also be taken into account.

Keypoint 3:

In order to handle the array that is returned, there must be a variable array of the same data type or one that is comparable at the method call.

For instance, the following is one way to save an integer array that was returned by any method.

Implementation:

We may examine a few different types of circumstances where we might be returning arrays to gain a better understanding of this. Here, we'll look at three different scenario instances.

  • Case 1: Simple Built-in arrays
  • Case 2: Array of objects
  • Case 3: Returning multidimensional arrays

Case 1: Returning a Java array of integers (built-in data type)

Using return statements, any array of a built-in data type, including integer, character, float, and double, can be returned.

Case 2: Returning in Java an array of objects

When returning arrays of built-in data types, this is done exactly the same way.

Case 3: Returning multidimensional arrays

It is possible to think of multidimensional arrays in Java as an array of arrays inside of arrays.

The most fundamental form might be a two-dimensional array. They have their sizes and make statements based on those sizes.

Below is a demonstration of returning a two-dimensional array, which follows a methodology quite similar to that of one-dimensional arrays.

import java.util.Arrays;
public class ReturnArray
{
public static void main(String args[])
{
int[] p=numbers();
for (int i = 0; i < p.length; i++)
System.out.print( p[i]+ " ");
}
public static int[] numbers()
{
int[] arr={1,3,11,21,43};
return arr;
}
}
  1. We import the util package in the first line of code.
  2. Next, a public class called Return Array is created.
  3. Next, public static void main is used (String args[])
  4. Next, we obtain an array using the int keyword.
  5. After that, the array is printed using a for loop.
  6. Next, system.out.println is used.
  7. Following that, public static int[] integers are used.
  8. Using that int keyword, we then initialise an array.
  9. Using return arr, we then return array.

Conclusion :-

Consequently, we have successfully acquired the knowledge necessary to return an array in Java.

Additionally, we discovered that in Java, a method or function can be used to return an array.

The array must have the same data type as the method return type and the variable used to hold the array must likewise have that data type.

I hope this article on how to return an array in java helps you and the steps and method mentioned above are easy to follow and implement.

Author Image About Pragati

Experienced coding content writer who enjoys breaking down complex concepts in programming languages like Java, Python, C, and C++. Over three years of experience producing interesting and relevant content for a variety of entities. Committed to providing concise and easy-to-understand articles that assist readers in easily understanding technology and industry trends in the world of coding and software development.

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