What is the difference between singleton class and a normal class

Question

please give an example

Answer 1

A singleton class can only have one instance whereas a normal class can have many.
Ie. A normal class allows you do this:
NormalClass object1 = new NormalClass()
NormalClass object2 = new NormalClass()
For a singleton class you must do
SingletonClass.getInstance()
The get instance checks whether the object has been created and creates the object in the same way that a normal class is instantiated but this is only done once. If it has already been accessed before, it will return you the object.

Answer 2

so it means if I try to create another object of singleton class then it will show error

Answer 3

Yes