Page 259 - computer science (868) class 11
P. 259

Sample output:
                         w    *     d
                         r    t     *
                         k     j    *
                    27.  Write a program in Java to print the following patterns.
                        a.  ABCDE        b. ABCDE          c.  A           d.  A
                         ABCD              BCDE              AB              BC
                         ABC               CDE               ABC             DEF
                           AB               DE                ABCD           GHIJ
                          A                E                 ABCDE
                          AB                                  ABCD
                          ABC                                 ABC
                          ABCD                                AB
                          ABCDE                               A
                    28.  Design a class to overload a function Joystring() as follows:
                        (i)   void Joystring (String s, char ch1, char ch2) with one string argument and two character arguments that replaces the character
                          argument ch1 with the character argument ch2 in the given string s and print the new string.
                            For example:
                            Input value of s =“TECHNALAGY”
                           ch1=‘A’,
                           ch2=‘O’
                            Output: “TECHNOLOGY”
                        (ii)  void Joystring (String s) with one string argument that prints the position of the first space and the last space of the given
                          string s.
                            For example:
                            Input value of =“Cloud computing means Internet-based computing”
                            Output: First index: 5
                            Last index: 36
                        (iii) void Joystring ( String s1, String s2 ) with two string arguments that combines the two strings with a space between them and
                          prints the resultant string.
                           For example:
                           Input value of s1 =“COMMON WEALTH “
                           Input value of s2=“GAMES “
                           Output: COMMON WEALTH GAMES
                           (use library methods)
                    29.  Write a program in Java to enter the names of 10 cities and their STD codes in two different 1 D arrays. The program displays the
                       output as per the user’s choice:
                        (i)  If the user enters the STD code, then it displays the corresponding city
                       (ii)   If the user enters the name of the city, then it displays its STD code
                           For example:
                           Choice     : 1
                           Enter STD code  : 011
                           New Delhi
                           Choice     : 2
                           Enter city name  : Lucknow
                          0522
                        Also, print the array with the cities whose names start with “A”.
                    30.  Write a program in Java that reads a string and a character. Each occurrence of the given character (regardless of its case) is
                       converted to its opposite case.
                        Sample Input: AabrAcadabrA and ‘a’
                        Sample Output:  aAbracAdAbra
                        (each ‘a’ or ‘A’ is converted to the opposite case, i.e., upper case to lowercase or vice-versa)




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