三种获取类在运行时对应class的方法

public class Test {
    public static void main(String[] args) {
        Class cla1=Person.class;
        Class cla2=new Person().getClass();
        Class cla3=null;
        try {
           cla3 =Class.forName("com.senbon.demo_5_24.Person");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        System.out.println(cla1+"\n"+cla2+"\n"+cla3);
    }
}
class Person{
}

输出结果全部等同forName内容