Foo java

gistfile1.java

// V1

public class Foo {
}

public class KungFoo extends Foo {
	public KungFoo(string owner){
		// ...
	}
}

public class FooBarred extends Foo {
	public FooBarred(string owner){
		// ...
	}
}

public class FooKing extends Foo {
	public FooKing(string owner){
		// ...
	}
}

public Foo createFoo(Class fooClass, string owner = "Bar"){
	Foo myFoo = new fooClass(owner);
	// some additional handling
	return myFoo;
}

// V2
// can be implemented with method passing in Java8

public abstract class FooSpec {
	public void init(Foo f);
}

public class KungFoo extends FooSpec {
	public void init(Foo f){
		// ...
	}
}

public class FooBarred extends FooSpec {
	public void init(Foo f){
		// ...
	}
}

public class FooKing extends FooSpec {
	public void init(Foo f){
		// ...
	}
}

public Foo createFoo(FooSpec fooSpec, string owner = "Bar"){
	Foo myFoo = new Foo(owner);
	fooSpec.init(myFoo);
	// some additional handling
	return myFoo;
}