> Quality-of-life features that aren’t too hard to add, and don’t meaningfully c...

> Quality-of-life features that aren’t too hard to add, and don’t meaningfully change a language in its absence. Often syntactic sugar

This is basically the premise of Project Coin, released in Java SE 7: https://openjdk.org/projects/coin/

    The goal of Project Coin is to determine what set of small language changes should be added to JDK 7. That list is:
    
    * Strings in switch
    * Binary integral literals and underscores in numeric literals
    * Multi-catch and more precise rethrow
    * Improved type inference for generic instance creation (diamond)
    * try-with-resources statement
    * Simplified varargs method invocation