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Instantiate subclass of abstract class

allelopath asked
Last Modified: 2013-11-23
If I have an abstract class and classes that extend it:
and then a method():

public void doSomething(MyAbstractClass myClass) {
  MyAbstractClass myNewClass = new ???(myClass);

How do I instantiate myNewClass given that it could be MyConcreteClassA, MyConcreteClassB, or MyConcreteClassC?
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