Java Practice Exercise – String Handling

• Read a string

  • Check for empty string

  • Display string length

• • Display reverse of a string

• • Character at a given position

  • Index of a substring in a string

  • Join a list of strings

• • Copy first n characters

  • Copy last n character

• • Split a string based on the spaces / delimiter

  • Copy n characters from m^th position

  • Convert all characters to uppercase

• • Convert all characters to lower case

  • Replace a character

  • Delete a character

• • Count number of vowels

• Convert string to character array and vice versa

• Read a String and display the ASCII value of each character in string

• Read a string and a character and display the first and last occurrence of character in string.

• Check if given character is upper case / lower case / digit / special character

• Count number of upper, lower, digit and special character

• Read a string and classify characters as upper case / lower case / digit / special character.

• Read a string and display total number of upper case / lower case / digit / special characters in it

• Sort an array of strings

• Read a string and sort the words alphabetically

Example:

Input:      EEE IT MECH AUTO CSE

Output:   AUTO CSE EEE IT MECH

• Write a Java Program that reads a line of integers, and then displays each integer, and the sum of all the integers (use StringTokenizer class)

• Read an array of strings and display the sets of anagrams.

• Write a Java program for sorting a given list of names in ascending order

• Write a program to check if a given string is a palindrome or not.

• Write a program to count and display the number of capital letters in a given string.

• Write a program to count the number of vowels in a string.

• Write a program to display the number of times each vowel occurs in a string. (ignore case)

• Write a program to remove all punctuations and special characters (~!@#$%^&*()_{}[]\:”;’<>?,./) in a given string.

• Write a java program that reads a string from inputs containing first name, last name and computes an e-mail address with first 3 letters of the first name, first 4 letters of last name, ‘.’ separator and domain. Display the outputs by invoking objects.

• Write a program to accept a string and display the resultant string in a reverse order. The resultant string should contain all characters at the even position of accepted string ignoring blank spaces.

Example:

Given string: An apple a day keeps the doctor away

Required output: ywrtoetpeydepaA

• Given a string containing both upper and lower case letters, write a python program to count the number of repeated characters and display the maximum count of a character along with the character

Sample input: ABaBCbGc

Output:

                           2A

                           3B

                           2C

                           1G

                           B is repeated 3 times

• Consider 2 strings string1 and string2 and display the merged_string as output. The merged_string should be capital letters from both the strings in the order they appear.

Sample Input:

String1: I Like Java

String2: Mary Likes Python

merged_string: ILJMLP