日常啪啪啪代码的时候,常常遇到浅复制与深复制的问题,下面就自己经验写写,有问题请留言!
例如我有一个简单的类:
···
class People
{
public int _age;
public string _name;
public People(int Age,string Name)
{
_age = Age;
_name = Name;
}
}
···
常见的赋值语句,如:
People Mike = new People(12,"Mike");
People Mike2 = Mike;
这是浅复制,共享同一块内存,类似指针,即Mike2与Mike对象同时指向了Mike新建时所申请的内存。
现在我为People类增加一个Clone()方法:
···
class People
{
public int _age;
public string _name;
public People(int Age,string Name)
{
_age = Age;
_name = Name;
}
public object Clone()
{
People MySelf = new People(this._age,this._name);
return MySelf; }
}
···
很明显,调用Clone()方法返回的对象是一个全新的对象,是新实例化出来的对象但是与原对象在值上相等。
People Mike = new People(12,"Mike");
People Mike2 = Mike;
People Mike3 = Mike.Clone() as People;
Mike2与Mike3在值上相等,但实际是完全独立的对象。
Mike2._name = "Jone";
//执行上述代码后,Mike的_name属性跟着改变了,而Mike3不变。