Educator

Classes and Objects

• Class: A class is a software package or template that describes the characteristics of similar objects.

• A class consists of variables describing an entity and methods to operate on the variables.

	class Person {
	    private String first = "", last ="", MI ="" ,ID="";
	    private  long id = 0;
	    public void setName(String fName, String lName, String mi){
	        first = fName ;
	        last = lName ;
	        MI = mi ;
	    }
	    public void setID(String Id){
	        id = Id ;
	    }
	    public String getName() {
	        return (last + ","+first + " " + MI);
	    }
	    public String toString(){
	        String st = getName() + "
ID : " + ID + "
Birth Date : "+ bDay ;
	        return st ;
	    }
	}  // end of class person definition 
	

• Object: Is an instance of a class, which is created at the run time.

	Person p1; // object p1 of type person