class People {
private int age;
private String name;
People(int age,String name){
this.age=age;
this.name=name;
System.out.println(age);
System.out.println(name);
}
}
public class Demo {
public static void main(String[] args) {
People p = new People(18,"lishuai");
}
}
在创建对象时，会默认一个空参构造，构造函数可以自己构建，在创建对象时就可以自己赋值。
