An interface can only use final variables. ... To use polymorphism, we can simply declare our variable type with List, ... Constant variables in Java.

The other types of variables in Java are: byte – stores whole numbers from -128 to 127; short – stores numbers from -32,768 to 32,767; int – stores whole numbers from -2,147,483,648 to ...

Keywords const vs. final in Java. The final keyword can be considered the Java languages equivalent for const.. If a Java developer wants a variable to be constant, they mark that variable as final.A ...

The static and final keyword combination effectively provides a more expressive way to declare unchanging variables, compared with an implementation of the const keyword in Java. In terms of fully ...