封装构造函数

/*** &＃64;program: bite* &＃64;description:* this 当前对象的引用* 没有初始化的默认为对应的0值* /没有特殊的要求&＃xff0c;属性都设置为私有的* Object是所有类的父类* &＃64;author: wenwen* &＃64;create: 2021-07-06 08:33**/
class Student{private String name;private int age;//alt &＃43; 0;public String getName() {return name;}public void setName(String name) {this.name &＃61; name;}public int getAge() {return age;}public void setAge(int age) {this.age &＃61; age;}// public String getMyname(){
// return MyName;
// }
// public void setMyname(String MyName) {
// this.MyName &＃61; MyName;//this表示当前对象的引用
// }public void show(){System.out.println("我叫"&＃43;this.name&＃43;this.age);}&＃64;Override//注解&＃xff1a;指的是这个方法是重新写得public String toString() {return "Student{" &＃43;"name&＃61;&＃39;" &＃43; name &＃43; &＃39;\&＃39;&＃39; &＃43;", age&＃61;" &＃43; age &＃43;&＃39;}&＃39;;}
}
public class fengZhuang {public static void main(String[] args) {Student student &＃61; new Student();student.setName("we");student.show();System.out.println(student.getName());System.out.println(student.toString());System.out.println(student);}
}


2.构造方法&this关键字

class Person1{private String name;private int age;public String getName() {return name;}public void setName(String name) {this.name &＃61; name;}public int getAge() {return age;}public void setAge(int age) {this.age &＃61; age;}&＃64;Overridepublic String toString() {return "Person{" &＃43;"name&＃61;&＃39;" &＃43; name &＃43; &＃39;\&＃39;&＃39; &＃43;", age&＃61;" &＃43; age &＃43;&＃39;}&＃39;;}public Person1(){this("caocao",18);//this()只能在构造方法中写&＃xff0c;只能调用一次System.out.println("Person");}public Person1(String name,int age){this.name &＃61; name;this.age &＃61; age;System.out.println("构造方法&＃xff1a;Person");}
}
public class gouZao {public static void main(String[] args) {
// Person1 per &＃61; new Person1("bit",12);Person1 per &＃61; new Person1();System.out.println(per.getAge());System.out.println(per.getName());}
}