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To use methods of a class I need to instantiate a class. At the moment the class has not constructor (so I want to write it). But than I have realized that the constructor should do nothing (I do need to specify values of fields).
In this context I have a question if it is OK to write constructor which does nothing. For example:
public Point() {
}
314
Having an empty constructor (whether static or not) in a class is redundant, and ReSharper issues a warning to that effect. In the above, an empty static constructor is, in fact, a necessary detail that guarantees lazy initialization.
The two rules for creating a constructor are: The name of the constructor should be the same as the class. A Java constructor must not have a return type. Default Constructor - a constructor that is automatically created by the Java compiler if it is not explicitly defined.
Empty constructor build GENERIC object, and constructor with parameters build objects with more specific information. Let's say the example above, if I create an instance object using the empty constructor: Person p1 = new Person(); -- it will still create an object but without any properties in it?
Constructors are called by the compiler automatically; they are rarely called explicitly by the programmer. If you write no constructor, the compiler will provide your class with a default constructor. The mechanism is suppressed once you write any constructor.
You don't need to write an empty contstructor; the Java compiler will automatically insert one for you (only if you haven't defined any other constructors that take some args).
So it's quite okay (and useful in some situations) but it's not required.
182
It sounds like you are explicitly creating a default constructor which there is no need to do. The Default Constructor is automatically created if there are no other constructors.
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