Java的构造器

package 构造器;

public class Persontest {
    public static void main(String[] args) {
        //创建的对象：new+构造器
        Person p=new Person();
        Person p1=new Person("tom");
        System.out.println(p1.name);
        Person p2=new Person("mike",19);
        System.out.println(p2.name+" "+p2.age);
        p.eat();
    }
}
class Person{
    //属性
    int age;
    String name;
    //构造器
    public Person(){
    System.out.println("Person()......");
    }
    public Person(String n){
        name=n;
    }
    public Person(String n,int a){
        name=n;
        age=a;
    }

    public void eat(){
        System.out.println("人吃饭");
    }
}