java - Variable Setting to All Subclasses -

is there way insantiate variable encompasses subclasses of class? i've read far must state type variable before setting equal something:

example:

exampleobject1 object = reference object

but if wanted make set variable instance or subclass of object?

yes, can that.

a variable of type t (as long t class/interface/enum/annotation) can hold reference instance of class t, or instance of class extends or implements t.

for example, works:

class myclass1 {     // ... stuff goes here ... }  class myclass2 extends myclass1 {     // ... stuff goes here ... }  class main {     public static void main(string[] args) {         myclass1 object = new myclass2();     } }