> Interface Implementation by delegation: This feature makes it easy and painless to follow the motto "composition over inheritance". Java makes implementation

> Interface Implementation by delegation: This feature makes it easy and painless to follow the motto "composition over inheritance". Java makes implementation inheritance 50 orders of magnitude easier than composition with manual delegation, so it's pretty natural that the vast majority of Java code- bases overuse inheritance in very bad ways. While we're on this subject, I'd like to rant for a bit. Why is this not a standard feature in every OO language today? The adage that composition should be preferred to (implementation) inheritance is itself older than Java, and was already fairly common wisdom 20 years ago - yet PL design has seemingly not reflected this.