Java. Ковариантность и контравариантность обобщенных типов на примере ArrayList.

In this video, I explain with examples why covariant and contravariant types are needed in Java, and how generic type parameter declarations work with the super and extends keywords. We'll also examine in detail how covariant and contravariant types behave using the ArrayList collection as an example. Support the channel💰: https://yoomoney.ru/to/410018856244871 #ArhiTutorialsJava #ityoutubersru