Java's default constructor allows developers to create instances of classes when no other constructors are explicitly ... and reference types are set to null. The null Unicode character of the char ...

The release of Java ... classes, like enums, capture alternatives in domain models, allowing programmers and compilers to reason about exhaustiveness. Sealed classes are also useful for creating ...

As the above screen snapshot indicates, the class dustin.examples.Person exists in both the src2 directory and (not shown here) in the src directory (“duplicate class: dustin.examples.Person”).