Answer Posted / paletipatisrinu

singleton class:A java class create only one object per jvm
is called singleton java class.Most of jdbc driver class
implemented as a singleton java class

Ex:
class SingletonClass
{
private static SingletonClass singleObject;
public static SingletonClass getInstance()
{
if (singleObject == null)
{
singleObject = new SingletonClass();
}
return singleObject;
}
}

Singletone java class example is
org.apache.struts.action.ActionServlet

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there are 67 seats in train . there are only 5 seats in a row and in last row there are only 2 seats. One person can reseve only 5 seat at a time. If person reserving seat , the care is atken that he may get all in row. if seats are not available in row then the arrangement is so that person group get nearby seats. the following class is given public class seat { char name; int seat; boolean isSeatempty } 1.Draw require class digram and object diagram. 2.Write function seatallot(int noofperson) to allocate seat with seat nuber printed for the each name.

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