在java中的方法调用接受实践中传递'this' [英] Is passing 'this' in a method call accepted practice in java

问题描述

在方法调用中传递当前对象是好/坏/可接受的做法。如：

Is it good/bad/acceptable practice to pass the current object in a method call. As in:

public class Bar{
    public Bar(){}

    public void foo(Baz baz){
        //  modify some values of baz
    }
}

public class Baz{
    //constructor omitted

    public void method(){
        Bar bar = new Bar();
        bar.foo(this);
    }
}

具体来说，是行 bar.foo（this）可以接受吗？

Specifically, is the line bar.foo(this) acceptable?

推荐答案

没有理由不使用它，此是当前实例，使用它是完全合法的。事实上，通常没有简洁的方法可以省略它。

There's no reason not to use it, this is the current instance and it's perfectly legitimate to use. In fact there's often no clean way to omit it.

所以要使用它。

因为很难说服它没有示例是可以接受的（对这样一个问题的否定答案总是更容易论证），我刚刚打开了一个最常见的java.lang类， String 一个，并且当然我找到了这种用法的实例，例如

As it's hard to convince it's acceptable without example (a negative answer to such a question is always easier to argument), I just opened one of the most common java.lang classes, the String one, and of course I found instances of this use, for example

1084        // Argument is a String
1085        if (cs.equals(this))
1086            return true;

寻找（此 in big接受项目，你会发现它。

Look for (this in big "accepted" projects, you won't fail to find it.

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