instantiate a class

[muthu muruges]

is it possible to create an instance of a class without invoking its constructor?

[Charlie Goth]

No, what are you trying to do?

[shankar surendranath]

There are some classes which can be instantiated only by calling static methods (example ResourceBundle). But even these methods will internally call the constructors and return a reference to the newly instantiated object.

[Ernest Friedman-Hill]

If you're interested in yourself creating an instance without calling a constructor: you won't be able to do it.

If you're wondering if an instance can come into being without a constructor being called: yes, there are several ways. The default clone() implementation doesn't call the class's constructor; neither does the serialization machinery when an object is deserialized.

[sander hautvast]

Class.newInstance() (see java.lang.Class api) should be mentioned here as well.
(it calls the default constructor (error when none there), but you yourself don't)

[necati sekkeli]

You are not supposed to write a constructor for each class. But a default constructor method (without any parameter) exists in class definiton. Also, writing constructor will give you opportunity to configure your class. (like constraints in some parameters).

On the other hand, for static classes, you do not need to use construct method as others say.