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This article mainly explains "the apply method in Scala and how to use singleton objects". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn the apply method in Scala and how to use singleton objects.

Create a new class:

By the way, the methods placed in the object object are static methods, as follows:

Next, take a look at the use of the apply method:

The above code always causes a call to the apply method and returns the value of the method call, which is the instantiated object of the ApplyTest, when we use "val a = ApplyTest ()".

The apply method can also be used in Class, and its usage is as follows:

Because the methods and properties in object are static, it is an ideal carrier for singleton objects. The example code is as follows:

In other words, object itself is a singleton object!

At this point, I believe you have a deeper understanding of "the apply method in Scala and how to use singleton objects". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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