Lets start with a bit of background: What happens when you start an application? The OS starts a process and assigns it a unique process id and allocates a process table.A process start an instance of DVM(Dalvik VM); Each application runs inside a DVM. A DVM manages class loading unloading, instance lifecycle, GC etc. Lifetime … Read more
what I want to know is why java forbids static fields/methods inside inner classes Because those inner classes are “instance” inner classes. That is, they are like an instance attribute of the enclosing object. Since they’re “instance” classes, it doesn’t make any sense to allow static features, for static is meant to work without an … Read more
Static variables cannot be elected for garbage collection while the class is loaded. They can be collected when the respective class loader (that was responsible for loading this class) is itself collected for garbage. Check out the JLS Section 12.7 Unloading of Classes and Interfaces A class or interface may be unloaded if and only … Read more
Add to your cpp file: constexpr char foo::baz[]; Reason: You have to provide the definition of the static member as well as the declaration. The declaration and the initializer go inside the class definition, but the member definition has to be separate.
The class declaration should be in the header file (Or in the source file if not shared). File: foo.h class foo { private: static int i; }; But the initialization should be in source file. File: foo.cpp int foo::i = 0; If the initialization is in the header file then each file that includes the … Read more