Java – symbolic constants

In Java, a symbolic constant is a named constant value defined once and used throughout a program. Symbolic constants are declared using the final keyword.

•  Which indicates that the value cannot be changed once it is initialized.
• The naming convention for symbolic constants is to use all capital letters with underscores separating words.

Syntax of Symbolic Constants

final data_type CONSTANT_NAME = value;

• final: The final keyword indicates that the value of the constant cannot be changed once it is initialized.
• data_type: The data type of the constant such as int, double, boolean, or String.
• CONSTANT_NAME: The name of the constant which should be written in all capital letters with underscores separating words. 
• value: The initial value of the constant must be of the same data type as the constant.

Initializing a symbolic constant:

final double PI = 3.14159;

Example:

Java

// Java Program to print an Array
import java.io.*;
public class Example {
    public static final int MAX_SIZE = 10;

    public static void main(String[] args)
    {
        int[] array = new int[MAX_SIZE];

        for (int i = 0; i < MAX_SIZE; i++) {
            array[i] = i * 2;
        }

        System.out.print("Array: ");
        for (int i = 0; i < MAX_SIZE; i++) {
            System.out.print(array[i] + " ");
        }
        System.out.println();
    }
}

Output

Array: 0 2 4 6 8 10 12 14 16 18