//object_constructor_const.dart文件
void main(){
//获取ImmutablePerson实例
ImmutablePerson p = ImmutablePerson.instance;
print('name:' + p.name);
print('age:' + p.age.toString());
}
class ImmutablePerson {
//静态常量
static final ImmutablePerson instance = const ImmutablePerson('张三', 20);
//姓名
final String name;
//年龄
final int age;
//构造方法
const ImmutablePerson(this.name, this.age);
}
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