我很好奇其他人是如何使用这个关键字的。我倾向于在构造函数中使用它，但我也可能在整个类的其他方法中使用它。一些例子:
在构造函数中:
public Light(Vector v)
{
this.dir = new Vector(v);
}
在其他地方
public void SomeMethod()
{
Vector vec = new Vector();
double d = (vec * vec) - (this.radius * this.radius);
}
当前回答
只要StyleCop告诉我，我就使用它。必须遵守StyleCop。噢,是的。
其他回答
我并不想这么说，但这并不重要。
认真对待。
看看那些重要的东西:你的项目，你的代码，你的工作，你的个人生活。它们中的任何一个都不会成功依赖于是否使用“this”关键字来限定对字段的访问。这个关键字不会帮助你按时发货。它不会减少bug，也不会对代码质量或可维护性产生明显的影响。它不会让你加薪，也不会让你在办公室花更少的时间。
It's really just a style issue. If you like "this", then use it. If you don't, then don't. If you need it to get correct semantics then use it. The truth is, every programmer has his own unique programing style. That style reflects that particular programmer's notions of what the "most aesthetically pleasing code" should look like. By definition, any other programmer who reads your code is going to have a different programing style. That means there is always going to be something you did that the other guy doesn't like, or would have done differently. At some point some guy is going to read your code and grumble about something.
I wouldn't fret over it. I would just make sure the code is as aesthetically pleasing as possible according to your own tastes. If you ask 10 programmers how to format code, you are going to get about 15 different opinions. A better thing to focus on is how the code is factored. Are things abstracted right? Did I pick meaningful names for things? Is there a lot of code duplication? Are there ways I can simplify stuff? Getting those things right, I think, will have the greatest positive impact on your project, your code, your job, and your life. Coincidentally, it will probably also cause the other guy to grumble the least. If your code works, is easy to read, and is well factored, the other guy isn't going to be scrutinizing how you initialize fields. He's just going to use your code, marvel at it's greatness, and then move on to something else.
我只在需要的时候使用它，除了对称操作，由于单参数多态性不得不把它放在一边的方法中:
boolean sameValue (SomeNum other) {
return this.importantValue == other.importantValue;
}
只要StyleCop告诉我，我就使用它。必须遵守StyleCop。噢,是的。
任何时候需要对当前对象的引用。
一个特别方便的场景是当对象调用一个函数并希望将自己传递给它时。
例子:
void onChange()
{
screen.draw(this);
}
我养成了在Visual c++中大量使用它的习惯，因为这样做会触发智能感知，当我按'>'键时，我很懒。(而且容易出现错别字)
但我继续使用它，因为我发现它很方便，可以看到我调用的是成员函数而不是全局函数。
