Question

Write a program with a function that accepts a string as an argument and returns a copy of the string with the first character of each sentence capitalized. For instance, if the argument is “hello. my name is Joe. what is your name?” the function should return the string “Hello. My name is Joe. What is your name?” The program should let the user enter a string and then pass it to the function. The modified string should be displayed.

Answer 1

Please find your solution written in JAVA:

import java.util.*;

// Java program to convert first character uppercase in a sentence
public class Conversion {
  
static String convert(String inputStr)
{
  
// Create a character array of given String
char chArr[] = inputStr.toCharArray();
for (int j = 0; j < inputStr.length(); j++) {
  
// If first character of a word is found
if (j == 0 && chArr[j] != ' ' ||
chArr[j] != ' ' && chArr[j - 1] == ' ') {
  
// If it is in lower-case
if (chArr[j] >= 'a' && chArr[j] <= 'z') {
  
// Convert into Upper-case
chArr[j] = (char)(chArr[j] - 'a' + 'A');
}
}
  
// If apart from first character, any 1 is in Upper-case
else if (chArr[j] >= 'A' && chArr[j] <= 'Z')
  
// Convert into Lower-Case
chArr[j] = (char)(chArr[j] + 'a' - 'A');   
}
  
// Convert the char array to equivalent String
String str = new String(chArr);
return str;
}
  
public static void main(String[] args)
{
Scanner sc= new Scanner(System.in); //System.in is a standard input stream
System.out.print("Enter a string: "); // asking user to enter the string
String str= sc.nextLine();   
System.out.println(convert(str)); // calling the convert function and printing the result
}
}

CONSOLE OUTPUT: