call static method on null object

Give the code first, guess the result

public class TestClass {
	private static void staticMethod(){
		System.out.println("static");
	}
	void normalMethod(){
		System.out.println("normal");
	}
	public static void main(String[] args) {
		TestClass testClass=((TestClass)null);
		testClass.staticMethod();
		testClass.normalMethod();
	}
}

I thought that a NullPointerException would be reported at the beginning
and the staticMethod() was actually executed. . .
The summary is as follows:
1.null can be casted to any object 2.null can be
casted to an object after calling the static method of the class without error

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