What will be the output of following Java program.

In Java, an array is a data structure that stores a fixed-size sequence of elements of the same data type. When an array is created, its size cannot be changed. This means that once an array is created, you cannot add or remove elements from it.

However, in some cases, it may be necessary to create an array whose contents cannot be modified. In Java, such an array is called a final array.

A final array is declared using the final keyword. Once a final array is initialized with values, its contents cannot be changed. This means that the elements of a final array cannot be reassigned to different values, nor can new elements be added to or removed from the array.

Here's an example of how to declare and initialize a final array in Java: 

final int[] myArray = { 1, 2, 3, 4, 5 };

In this example, the array "myArray" is declared as final. Once the array is initialized with values, those values cannot be changed.

Final arrays are useful when you want to ensure that the contents of an array remain constant throughout the execution of a program. This can be helpful in preventing accidental modification of array elements, which can lead to unexpected behavior in your code.