Lazy class cast in Java?

Can someone please enlighten me as to why I don't get a ClassCastException in this snippet? I'm strictly interested into why it isn't working as I was expecting. I don't care at this point whether this is bad design or not.

public class Test {
  static class Parent {
    @Override
    public String toString() { return "parent"; }
  }

  static class ChildA extends Parent {
    @Override
    public String toString() { return "child A"; }
  }

  static class ChildB extends Parent {
    @Override
    public String toString() { return "child B"; }
  }

  public <C extends Parent> C get() {
    return (C) new ChildA();
  }

  public static void main(String[] args) {
    Test test = new Test();

    // should throw ClassCastException...
    System.out.println(test.<ChildB>get());

    // throws ClassCastException...
    System.out.println(test.<ChildB>get().toString());
  }
}

This is the java version, compilation, and run output:

$ java -version
java version "1.7.0_17"
Java(TM) SE Runtime Environment (build 1.7.0_17-b02)
Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)
$ javac -Xlint:unchecked Test.java
Test.java:24: warning: [unchecked] unchecked cast
    return (C) new ChildA();
               ^
  required: C
  found:    ChildA
  where C is a type-variable:
    C extends Parent declared in method <C>get()
1 warning
$ java Test
child A
Exception in thread "main" java.lang.ClassCastException: Test$ChildA cannot be cast to Test$ChildB
  at Test.main(Test.java:30)

Copyright License：
Author:「Ionuț G. Stan」,Reproduced under the CC 4.0 BY-SA copyright license with link to original source & disclaimer.
Link to：https://stackoverflow.com/questions/15389994/lazy-class-cast-in-java