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DateTest.java

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package DataType;

import java.util.Date;

public class DateTest extends Date {

private void test() {

System.out.println(super.getClass().getName());

//包名.类名，调用父类的getClass()，但是Date类并没有重写Object的getClass()方法，所以相当于调用Object对象的getClass方法，DataType.DateTest

/*

* @return The {@code Class} object that represents the runtime

* class of this object.

public final native Class<?> getClass();

*

* */

System.out.println(super.getClass().getSuperclass()); //class java.util.Date

}

public static void main(String[] args) {

new DateTest().test();

}

}