ByVal and ByRef in Java

This video explains the difference between passing parameters ByVal and ByRef in java Its important to know the difference between the two because strange bugs can appear if it is not understood.

In most programming languages parameters are passed to methods and functions. Parameters can be passed in two ways: 1) by value (ByVal); or 2) by reference (ByRef). When passing parameters by value, a new copy of the parameter is sent over to the method being called. If the value is changed within the method, it remains unchanged in the calling method. When passing by reference, a pointer to the object is passed to the method, so if the object is changed within that method, it will be changed outside of it also.

In Java, primitive data type parameters are passed by value (ByVal) and objects are passed by reference (ByRef). ... https://www.youtube.com/watch?v=pbEa1bentd8