constant variable java code example

Example 1: constants in Java

//A constant is a variable whose value won't change after it's been defined.

private static final int OUR_CONSTANT = 1;

//We make our constants static and final and give them an appropriate type, 
//whether that's a Java primitive, a class, or an enum. 
//The name should be all capital letters with the words separated by underscores, 
//sometimes known as screaming snake case.

Example 2: how to make a variable unchangeable in java

class scratch{
	public static void main(String[] args){
		final pi = 3.14;
	}
}

Example 3: constant java declaration

final double Pi = 3.1415926536;

Example 4: create constant class in java

public final class MyValues {
  public static final String VALUE1 = "foo";
  public static final String VALUE2 = "bar";
}

Example 5: what are constants and how to create constants in java

Constants are fixed values whose values cannot be changed during 
the execution of program. We create constants in java using final keyword.

Ex : final int number = 10;
final String str = ”I love Java”;

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