Java by Example: Constants

Java uses the final keyword to denote constant variables. These variables can be of any type.
	public class Main
The `final` keyword declares a constant value.	public static final String S = "constant";
	public static void main(String[] args) { System.out.println(S);
A `final` variable can be declared anywhere a regular variable can be declared.	public static final int N = 500000000;
Final variables must be assigned a value exactly once. This can be done at the time of declaration, in the constructor, or in an instance initializer block for non-static variables.	final int d; { // initializer block d = 1000; }
A final variable can be used in any context where a regular variable can be used.	System.out.println(N); }

$ java Main
constant
500000000

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