class Person {
String name = 'jack';
int age = 20;
void printInfo() {
print('name:${this.name}---age:${this.age}');
}
}
class NewPerson extends Person {}
main() {
NewPerson p = new NewPerson();
print(p.name); //子类访问父类属性
print(p.age); //子类访问父类属性
p.printInfo(); //子类访问父类方法
}
输出结果
jack
20
name:jack---age:20