1) Java 4 Features :
The important feature of J2SE 4 is assertions. It is used for testing.
- Assertion (Java 4)
2) Java 5 Features :
The important features of J2SE 5 are generics and assertions. Others are autoboxing, enum, var-args, static import, for-each loop (enhanced for loop etc.
- For-each loop (Java 5)
- Varargs (Java 5)
- Static Import (Java 5)
- Autoboxing and Unboxing (Java 5)
- Enum (Java 5)
- Covariant Return Type (Java 5)
- Annotation (Java 5)
- Generics (Java 5)
