Distinguish between Object and class?

Object:-Object is a entity which remain active in the system(Like we are a object which remain active in the world).The Object can represent a person,a place,a bank account etc which is handle by the program.So in programming every problem is analysed in terms of objects and there nature of communication(Like in world we communicate with others ).So when a program is executed these objects  reaming active in system and interact  by sending messages to each other.Remember that these objects do not know the internal details of each others.Lets take an example how objects communicate:-

When you go to Bank you have to communicate with some one to get information same as objects communicate with each other to exchange information,like in above example the program(software)developed to manage bank account data,that program will have two objects one will be Customer and other will be Account(remember that at the project level there will be so many objects will be created) and they will communicate to do bank transaction.

Class:-We know every objects have data and methods code  to manipulate the data.(like we have some attributes and functionality).The entire set of data and methods code of an object can be made user defined data type using the class.Once a class is defined we can create any number of objects belonging to that class.Example:-

Class Student

{

      String  Name ;

      int age;

      Student(String nm,int ag)

      {

          Name=nm;

          age=ag;

      }

      public static void main(String arg[])

      {

          Student Steve=new Student("Stave",21);

          Student John=new Student("John",19);

}

So in above example student is a class,Stave and John are objects of Student class