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e. a e
a p l e
a p p l e
a p l e
a e
9. Write a program in Java to input a string in a mixed case. Find and display the frequency of each vowel. For example:
Input : St. Xavier’s Institution
Output:
The frequency of ‘a’ or ‘A’ - 1
The frequency of ‘e’ or ‘E’ - 1
The frequency of ‘i’ or ‘I’ - 3
The frequency of ‘o’ or ‘O’ - 1
The frequency of ‘u’ or ‘U’ - 0
10. Use the following specifications to design a Java program.
Class name : abbreviation
Data Member
String name : to store name
Member Methods
abbreviation(String n) : parameterized constructor to assign name = n
void pattern1() : prints the name in the following format
Ram Kumar Sharma – R.K.Sharma
void pattern2() : prints the name in the following format
Ram Kumar Sharma – R.K.S.
11. Write a Java program to input a sentence and print the consecutive and repeated characters in the sentence. For example:
Input: understanding computer science
Output:
Consecutive Characters: de, rs, st
Repeated Characters: unerstic
12. Write a program in Java to input a word and arrange all the letters of the word in ascending order. For example:
Input: INDIA
Output: ADIN
13. Use the following specifications to design a Java program.
Class name : happy_word
Data Members
String wd : word to be taken
Member Methods
happy_word() : non-parameterized constructor to initialize wd to “”
void input() : inputs the word in wd
void check_happy() : checks whether the word is a happy word or not.
[A “Happy Word” is a word whose eventual sum of the square of the digits of its word value is equal to 1.]
Sample Input: ATV
Place value A=1, T=20, V=22
[Hint A=1, b=2,.............................Z=26]
Solution: 12022 => 1^2+2^2+0^2+2^2+2^2=13 =>1^2+3^2=10 => 1^2+0=1
Sample Output: A Happy Word
14. Use the following specifications to design a Java program.
Cass name : find_string
Data Member
Sring sen : Assign a sentence
278278 Touchpad Computer Science-XI

