An ADT doesn’t care about the memory representation ... In contrast, a data structure is a concrete implementation of one or more ADTs, similar to how Java classes implement interfaces.

it allocates the memory and writes the values now using instances of the VarHandle class. MemoryLayout POINT_2D = MemoryLayout.structLayout( ValueLayout.JAVA_DOUBLE.withName("x"), ValueLayout.JAVA ...

Java is known for its garbage collection. Garbage collection (GC) is a form of automatic memory management ... there is just one .java, one .class extension. Java has a binary standard.