Java

Java's Optional class is a partial replacement for null and allows for more of a compile-time null check.

The JVM, JRE, and JDK are the tools needed for developing and/or running a Java application.

It is a tradition to start with a simple program that outputs the text "Hello World."

What collection is the right one for the job?

Checked exceptions are checked by the compiler whereas unchecked exceptions are not.

Listing checked exceptions in the throws clause of a unit test method is pointless.