Practical 15: Prepare a class diagram for given group of classes using multiplicity, generalization, association concepts. And add at least 5-7 attributes and 3-5 operations for particular class. City, Airport, Airline, Pilot, Flight, Plane, Seat, Passenger

Solution:

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Practical 9 : Write an interactive program to print a string entered in a pyramid form. For instance, the string “stream” has to be displayed as follows:

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                  s                s     t              s    t     r          s     t     r    e       s     t    r      e   a    s     t    r     e      a   m Program: public class practical9    {     public static void main(String[] args)     {         int i, j, k;  String str = "Stream";         for (i = 0; i < str.length(); i++)       {             for (j = (str.length() / 2) + 1; j >= i; j--)  ...
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