Java学习笔记

package day06;class Person{String name;int age;public Person(){System.out.println("1.public Person(){}");}}class Student extends Person{String school;//子类对象在实例化时会默认先去调用父类中的无参构造方法，public Student(){//之后再调用本类中的相应构造方法super();//隐藏语句System.out.println("2.public Person(){}");}}public class Test01 {/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubStudent stu=new Student();stu.name="zhang";stu.age=21;stu.school="Tsinghua";System.out.println(stu.age+stu.name+stu.school);}}

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