Introduction
When programming in Java, it is important to understand when and how to use blank parameters. Blank parameters are used to indicate that a method does not require any parameters to be passed in. This can be useful when a method does not need any additional information to execute, or when a method is being used as a placeholder for a more complex operation. In this article, we will discuss when and how to use blank parameters in Java.
Solution
Blank parameters in Java are used when a method does not require any arguments to be passed in. This is often used when a method is only performing a single task and does not need any additional information to do so. For example, a method that prints out a message to the console may not require any parameters.
You’d use them when you don’t need to give the constructor or method any data. In the case of your ArrayList it’s to make an empty array with a default capacity of 10 elements (OpenJDK implementation).
As an abstract example, I can tell you to eat() but I don’t care what you eat, so I don’t tell you what to eat. (in the case of a method)
Or I can make a new Bookshelf() but I don’t have any books, so I don’t tell it anything, I just need an empty bookshelf. (in the case of a no-args constructor)
solved When to use blank parameters in Java? [closed]
When to Use Blank Parameters in Java?
When programming in Java, it is important to understand when to use blank parameters. Blank parameters are used to indicate that a method or constructor does not take any arguments. This is useful when you want to create an object without any additional information. Blank parameters are also used to indicate that a method does not return any value.
Blank parameters are typically used when creating objects. For example, if you wanted to create a new instance of a class, you would use blank parameters. This is because the constructor does not take any arguments. The same is true for methods that do not return any value. Blank parameters are also used when calling methods that do not take any arguments.
It is important to note that blank parameters are not the same as null parameters. Null parameters are used to indicate that a method or constructor takes a null value as an argument. This is useful when you want to pass a null value to a method or constructor. Blank parameters, on the other hand, are used to indicate that a method or constructor does not take any arguments.
In summary, blank parameters are used to indicate that a method or constructor does not take any arguments. This is useful when you want to create an object without any additional information or when calling methods that do not take any arguments. It is important to note that blank parameters are not the same as null parameters, which are used to indicate that a method or constructor takes a null value as an argument.