在Dart / Flutter中重新实例化类变量

class MyClass {
  int value;

  MyClass(this.value);

  void reset() {
    value = 0;
  }
}

void main() {
  MyClass myInstance = MyClass(10);

  print('Initial value: ${myInstance.value}'); // 输出: Initial value: 10

  // 重新实例化
  myInstance = MyClass(0);

  print('After re-instantiation: ${myInstance.value}'); // 输出: After re-instantiation: 0
}

class MyClass {
  int value;
  String name;

  MyClass(this.value, this.name);

  void reset() {
    value = 0;
    name = '';
  }
}

void main() {
  MyClass myInstance = MyClass(10, 'Initial');

  print('Before reset: $myInstance'); // 输出: Before reset: MyClass(value: 10, name: Initial)

  myInstance.reset();

  print('After reset: $myInstance'); // 输出: After reset: MyClass(value: 0, name: )
}