How to Return an Array in Java [ With Explanation ]

 

1. How to Return an Integer in Java Using createArray() Method

After executing the below program, the compiler will ask the user to enter the size of an array. After entering the size the compiler will ask to enter the elements and then returns the elements of an array on the screen.

Java

1

//Learnprogramo

2

import java.util.Arrays;

3

import java.util.Scanner;

4

public class Learnprogramo

5

{

6

public int[] createArray() {

7

Scanner sc = new Scanner(System.in);

8

System.out.println("Enter the size of the array that is to be created:: ");

9

int size = sc.nextInt();

10

int[] myArray = new int[size];

11

System.out.println("Enter the elements of the array ::");

12

for(int i=0; i<size; i++)

13

{

14

myArray[i] = sc.nextInt();

15

}

16

return myArray;

17

}

18

public static void main(String args[]) {

19

Learnprogramo obj = new Learnprogramo();

20

int arr[] = obj.createArray();

21

System.out.println("Array created is :: "+Arrays.toString(arr));

22

}

23

}

Output:

The above program returns an array of integer type.

2. If return type is Double

In this program, we will see how to write a java program to return an array if the returned value is double.

Java

1

//Learnprogramo

2

public class Learnprogramo 

3

{  

4

public static double[] returnArray()  

5

{  

6

double[] arr = new double [3];// Creating an array of 3 elements  

7

arr[0]=6.9;  

8

arr [1]=2.5;  

9

arr [2]=11.5;  

10

return(x);// Return the reference of the array  

11

}  

12

public static void main(String[] args)  

13

{  

14

double[] a; //variable to store returned array  

15

a = returnArray();  //called method  

16

for (int i = 0; i < a.length; i++) //for loop to print the array  

17

System.out.println( a[i]+ " ");     

18

}  

19

}  

Output:

3. If Method Returns an Array of Object Type

In this program, we will see if the method returns an array of the Object type.

Java

1

//Learnprogramo

2

import java.util.Arrays;  

3

class Learnprogramo  

4

{  

5

public static int[] returnArray()  

6

{  

7

int a1=20;  

8

int a2=23;  

9

int a3=87;  

10

return new int[] {a1,a2,a3};

11

}  

12

public static void main(String args[])  

13

{  

14

int[] arr=returnArray();

15

System.out.println(Arrays.toString(arr)); 

16

}  

17

}  

Output:

4. Returning Multiple Values in Java

In this program, the method can return multiple values but of the same type by returning an array.

Java

1

//Learnprogramo

2

public class Main 

3

{ 

4

static int[] getSumAndSub(int a, int b) 

5

{ 

6

int[] ans = new int[2]; 

7

ans[0] = a + b; 

8

ans[1] = a - b; 

9

// returning array of elements 

10

return ans; 

11

} 

12

public static void main(String[] args) 

13

{ 

14

int[] ans = getSumAndSub(175, 25); 

15

System.out.println("Sum = " + ans[0]); 

16

System.out.println("Sub = " + ans[1]); 

17

} 

18

} 

Output:

5. How to Return String Array From Method

The following program demonstrates an example of returning an array reference from the method. To declare an array of string return_Array() method is declared and ret_Array is used to return an array.

Java

1

//Learnprogramo

2

import java.util.*;

3

public class Main

4

{

5

public static String[] return_Array() 

6

{

7

//define string array

8

String[] ret_Array = {"India", "UK", "USA", "Spain", "France"};

9

//return string array

10

return ret_Array;

11

}

12

public static void main(String args[]) {

13

//call method return_array that returns array   

14

String[] str_Array = return_Array();

15

System.out.println("Array returned from method:" + Arrays.toString(str_Array));

16

}

17

}

Output:

Frequently Asked Questions?

---

1. How to Return an Int Array in Java?

We can return an int array in java using createArray() method which accepts integers from the users and return an integer array.

2. How to Return the Index of an Array in Java?

The java provides an inbuilt method called as IndexOf() which returns an index of the first appearance of the target in the array. lastIndexOf() method is also used to return the index of the last appearance of the target in the array.

3. How to Return an array from a Method in Java?

Java inbuilt method createArray() is used to return an array where we have to input array elements in the program.

What is an Array in Java?

In Java, arrays are a basic construct that allows you to conveniently store and access a large number of values. There are containers that contain data values of a single type.

For example, you can create an array that can contain 100 values for the int type.

The size of an array is also known as the length of the array and is specified when creating the arrays. 

The total number of values is the size of the array and the values are stored directly in the arrays starting from index 0. The array can store up to 5 values of an integer data type (int array = new int (5)). Fix that “5 values” means that the value is stored directly in an array, starting with an index of 0 and so on.

An array is a Java object, and every variable declared in it contains a reference to that object, just like any other variable in the same class. 

Note that this declaration only names the variable and says that it references the type of the array.

This shows that the array is of its kind: it is a Java object, just like any other object in the class.

Array as Java Object

The array is a Java object, and every variable declared in it contains a reference to that object, just like any other variable in the class, such as the array variable.