whether the results are the same of getClass().getName() called in child class and parent class?

原创于 2016-02-24 14:13:28 发布 · 444 阅读

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本文通过一个具体的Java示例展示了getClass().getName()方法在父类和子类中的使用情况，并验证了该方法返回的类名是否一致。实验结果显示，无论是在父类还是子类中调用，返回的都是子类的全限定名。

whether the results are the same of getClass().getName() called in child class and parent class?

UsageGetClass2.java

abstract class AbstractClass {
        public AbstractClass() {
                System.out.println("the current class(in AbstractClass):" + this.getClass().getName());
        }
        abstract public void print();
}

public class UsageGetClass2 extends AbstractClass {
        public UsageGetClass2() {
                super();
        }

        public static void main(String[] args) {
                UsageGetClass2 g = new UsageGetClass2();
                g.print();
                System.out.println("the current class is(in child class): " + g.getClass().getName());
        }

        public void print() {
                System.out.println("hello world!");
        }
}

the result:

xxx:~/java/getclass$ java UsageGetClass2
the current class(in AbstractClass):UsageGetClass2
hello world!
the current class is(in child class): UsageGetClass2

the results are the same.