COMP6018 - AdvOOP

Question 1

What features were introduced to Java 5?

Answer 1

• Autoboxing and unboxing
• Varargs
• Enums
• Static Imports (allows sqrt(PI) instead of Math.sqrt(Math.PI) when statically importing Math)
• Annotations (e.g. @Override)

Question 2

What features were introduced to Java 7?

Answer 2

• Binary literals (e.g. 0b00001000)
• Hex literals (I think) (e.g. 0xF0)
• Underscores in numeric literals (e.g. 1_000_000 is now allowed)
• String keys in switch statements
• Revision of Exceptions
  – Now represented by Object (?)
  – Explicit keywords (?)
  – Try-Catch (?)

Question 3

What features were introduced to Java 8?

Answer 3

• Lambda expressions (e.g. (int x) -> {x + 1}) - replacement of annonymous inner class
• Method references (e.g. ContainingClass::staticMethodName) (first-class functions - kinda)
• Default method definitions for interfaces