Java面向对象基础就包括有参构造方法和成员方法

无参构造声明方式为

class Teacher{//无参构造方法，一般用在初始化变量    public Teacher(){    }}

有参构造声明为

class Teacher{//有参构造方法，一般用在设置变量值    String name;    public Teacher(String name){        this.name = name;    }

接下来放两个例子，分别为有参构造，成员方法使用（成员方法就不讲了，太过于好理解）

1、有参构造实例

public class Main {    public static void main(String[] args) {        // TODO 自动生成的方法存根        Teacher teacher = new Teacher("王老师",17,"S1班","篮球");        teacher.sayInfo();        System.out.println("----------------");        Teacher teacher2 = new Teacher("李老师",18,"S2班","足球");        teacher2.sayInfo();    }}class Teacher{    String name;    int age;    String jiudu;    String aihao;        public Teacher(String name,int age,String jiudu,String aihao){        this.name = name;        this.age = age;        this.jiudu = jiudu;        this.aihao = aihao;    }        public void sayInfo() {        System.out.printf("%s\n年龄:%d\n就读于:%s\n爱好:%s\n", name,age,jiudu,aihao);    }}

2、成员方法实例

public class Main {    public static void main(String[] args) {        // TODO 自动生成的方法存根        Menpiao menpiao = new Menpiao();        menpiao.setName("张三");        menpiao.setAge(17);        menpiao.pay();    }}class Menpiao {    // 成员属性声明    String name;    int age;    String money;    //设置成员名称    public void setName(String name) {        this.name = name;    }    //设置成员年龄    public void setAge(int age) {        this.age = age;        if (age > 16) {            this.money = "20";        } else {            this.money = "免费";        }    }    // 支付，打印小票    public void pay() {        System.out.printf("%s的年龄为:%d,门票价格为:%s",name,age,money);    }}