class Person{
String name = "";
int age = 0;
Person(String name, int age){//默认构造函数
this.name = name;
this.age = age;
}
Person.now(){
print("我是匿名构造函数");
}
Person.anOther(String name, int age){
this.name = name;
this.age = age;
print("我是另一个匿名构造函数");
print("$name====$age");
print("${this.name}====${this.age}");
}
}
构造函数、命名构造函数调用:
// Person(String name, int age){//默认构造函数 // this._name = name; // this._age = age; // } Person():_name="wangwu",_age=22{ print("$name===$age"); }
Person p = new Person.now();
Person p = new Person.anOther("lisi",22);
如何把字段变成私有:加下划线
String _person;