what does a final class in java mean code example

Example 1: what is final in java

Final is used to apply restrictions on class, method, and variable.
The final class can't be inherited, final method can't be overridden,
and final variable value can't be changed. Final is a keyword

Example 2: how make a final variable in java

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