Почему не нужно писать «Привет» первым сообщением в чате. Простое правило, которым нужно пользоваться всем, для улучшения коммуникации в чатах и мессенджерах.

Java: We have Comparable and Comparator. Both of them share common theme - compare two objects and return int result[1]. More than zero means that first object is greater than second, less than zero means second object is greater than first and zero means objects are kinda equal to each other[2] Comparable is attached to specific class itself and usually used to compare something with itself (class X implement Comparable), however it is not strictly necessary. Comparator is declared separately from the…