Returning Multiple values in Java
Java doesn’t support multi-value returns. We can use following solutions to return multiple values.
If all returned elements are of same type
We can return an array in Java. Below is a Java program to demonstrate the same.
// A Java program to demonstrate that a method // can return multiple values of same type by // returning an array class Test { // Returns an array such that first element // of array is a+b, and second element is a-b static int [] getSumAndSub( int a, int b) { int [] ans = new int [ 2 ]; ans[ 0 ] = a + b; ans[ 1 ] = a - b; // returning array of elements return ans; } // Driver method public static void main(String[] args) { int [] ans = getSumAndSub( 100 , 50 ); System.out.println( "Sum = " + ans[ 0 ]); System.out.println( "Sub = " + ans[ 1 ]); } } |
Sum = 150 Sub = 50
If returned elements are of different types
Using Pair (If there are only two returned values)
We can use Pair in Java to return two values.
// Returning a pair of values from a function import javafx.util.Pair; class GfG { public static Pair<Integer, String> getTwo() { return new Pair<Integer, String>( 10 , "GeeksforGeeks" ); } // Return multiple values from a method in Java 8 public static void main(String[] args) { Pair<Integer, String> p = getTwo(); System.out.println(p.getKey() + " " + p.getValue()); } } |
If there are more than two returned values
We can encapsulate all returned types into a class and then return an object of that class.
Let us have a look at the following code.
// A Java program to demonstrate that we can return // multiple values of different types by making a class // and returning an object of class. // A class that is used to store and return // three members of different types class MultiDivAdd { int mul; // To store multiplication double div; // To store division int add; // To store addition MultiDivAdd( int m, double d, int a) { mul = m; div = d; add = a; } } class Test { static MultiDivAdd getMultDivAdd( int a, int b) { // Returning multiple values of different // types by returning an object return new MultiDivAdd(a * b, ( double )a / b, (a + b)); } // Driver code public static void main(String[] args) { MultiDivAdd ans = getMultDivAdd( 10 , 20 ); System.out.println( "Multiplication = " + ans.mul); System.out.println( "Division = " + ans.div); System.out.println( "Addition = " + ans.add); } } |
Multiplication = 200 Division = 0.5 Addition = 30
Returning list of Object Class
// Java program to demonstrate return of // multiple values from a function using // list Object class. import java.util.*; class GfG { public static List<Object> getDetails() { String name = "Geek" ; int age = 35 ; char gender = 'M' ; return Arrays.asList(name, age, gender); } // Driver code public static void main(String[] args) { List<Object> person = getDetails(); System.out.println(person); } } |
[Geek, 35, M]
This article is contributed by Twinkle Tyagi. If you like GeeksforGeeks and would like to contribute, you can also write an article and mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above
Please Login to comment...