Java preview compile time switches To eliminate this compile time error, just add a few switches to the javac command, which indicates that you are well aware that the code you want to compile uses ...

Learn how to use the Command pattern to encapsulate requests as objects that you can execute alone or in sequence in your Java programs.

Generics in the Java Collections Framework Generics are integrated into Java Collections to provide compile-time type checking and to eliminate the need for explicit type casting.