Java对象可以自己传递自己的实例

I have a class called SomeClass which has a method called methodToCall(SomeClass o)

我有一个名为SomeClass的类，它有一个名为methodToCall的方法（SomeClass o）

If I instantiate SomeClass like this:

如果我像这样实例化SomeClass：

SomeClass itsObject = new SomeClass();

Can I then do this:

我可以这样做：

itsObject.methodToCall(itsObject);

5 个解决方案

#1

Absolutely. How that will behave will depend on the implementation, of course.

绝对。当然，这将取决于实施方式。

Just as an example, equals is defined to be reflexive, such that:

举个例子，equals被定义为反身，这样：

x.equals(x)

should always return true (assuming x is non-null).

应始终返回true（假设x为非null）。

#2

Yes, you can.

是的你可以。

One (contrived) example:

一个（人为的）例子：

BigInteger one = BigInteger.ONE;
BigInteger two = one.add(one);

(You should try these things in your IDE - it takes less time than writing a question)

（你应该在你的IDE中尝试这些东西 - 它比写一个问题花费的时间更少）

#3

Yes. There is nothing that prevents you doing this.

是。没有什么可以阻止你这样做。

#4

It would be by default,
you don't need to specify it. in method body you can refer it as this

默认情况下，您不需要指定它。在方法体中，您可以将其称为此

Note: method should not be static

注意：方法不应该是静态的

and if you want to externally specify you can do it simple.

如果你想在外部指定你可以做到这一点。

#5

Yes, you can do this, as long as methodToCall accepts an object of type SomeClass(or a class deriving from SomeClass) as a parameter:

是的，只要methodToCall接受SomeClass类型的对象（或派生自SomeClass的类）作为参数，就可以这样做：

public void methodToCall(SomeClass parameter){.....}

You can call it from outside your class:

你可以从课外打电话：

yourObject.methodToCall(yourObject)

or from within the class, using this :

或者从课堂内，使用这个：

public class SomeClass{
    ...
    public void AnotherMethod(SomeClass parameter)
    {
       this.methodToCall(this);
    }
    ...
}

#1