I have the following setup which I would think would work but is giving an error in my IDE (Android Studio):
// MyClass1.java public class MyClass1{ public MyClass1(){} public class MyNestedClass1{} } // MyClass2.java public class MyClass2{ public static MyClass1 MY_CLASS1 = new MyClass1(); public MyClass2(){ new MY_CLASS1.MyNestedClass1(); //Error } } The specific IDE error is:
cannot resolve symbol MyNestedClass1
The notation is
MY_CLASS1.new MyNestedClass1(); //No Error Syntax is
<Expression that resolves to a reference of the enclosing class>.new [Name of nested inner class](..) 
// MyClass2.java public class MyClass2{ public static MyClass1 MY_CLASS1 = new MyClass1();//you have already instantiated MyClass1 by new operator here public MyClass2(){ MY_CLASS1.new MyNestedClass1(); //so now intantiate only inner class by new operator } } You could define the nested class as static. This would allow instantiation independently of a MyClass1.
// MyClass1.java public class MyClass1{ public MyClass1(){} public static class MyNestedClass1{} } // MyClass2.java public class MyClass2{ public MyClass2(){ /* One Way. */ new MyClass1.MyNestedClass1(); /* Or Another. */ new MyNestedClass1(); } } 