How can I combine two objects of different subclasses into a third subclass?

Question

Something like this:

public class Type
{
  //code
}

public class TypeA extends Type
{
  //code
}

public class TypeB extends Type
{
  //code
}

I want to create a third class named Type C that includes all values of both Type A and B.

For example, lets say that both Type A and B have two values and I want to make something like this in the main class:

Type c = new TypeC(TypeA(value, value), TypeB(value, value));