Pass an integer by reference in Java

To pass an integer by reference in Java, try the following code-

Example

public class Demo {
　　　public static void display(int[] arr) {
　　　　　　arr[0] = arr[0]　+　50;;
　　　}
　　　public static void main(String[] args) {
　　　　　　int val =　50;
　　　　　　int[] myArr = { val };
　　　　　　display(myArr);
　　　　　　System.out.println(myArr[0]);
　　　}
}

Output Result

100

In the above program, a custom method is created that passes an int array.

int val =　50;
int[] myArr = { val };
display(myArr);

In this method, we perform mathematical operations on the array values.

public static void display(int[] arr) {
　　　arr[0] = arr[0]　+　50;;
}

The updated value is then displayed in the main window.

System.out.println(myArr[0]);