Java actually doesn't need to add any features for it to support this, it needs to remove them. I recommend reading this excellect article: http://habitatchroni

Java actually doesn't need to add any features for it to support this, it needs to remove them. I recommend reading this excellect article: http://habitatchronicles.com/2017/05/what-are-capabilities/ http://habitatchronicles.com/2017/05/what-are-capabilities/ The gist is: Rule #1: All instance variables must be private Rule #2: No mutable static state or statically accessible authority Rule #3: No mutable state accessible across thread boundaries