getClass()返回子类Class对象

getClass()返回子类Class对象

public class Test {
    static abstract class A{
        int a;
    }
    static class B extends A{
        int b;
    }
    public static void main(String[] args){
        Test.A a = new Test.B();
        //class Test$B
        System.out.println(a.getClass());
    }
}

输出：

class Test$B