Capitalize a String in Java

An example on making the characters after the space capital if they are not, in Java. Here is a logic that i've written and that's what i can do. Still more efficient logics are appreciated in the comments. Thanks and go ahead. The [main logic] will also work in any programming language.

Let's capitalize!

import java.util.*;

class CapitalizeString

{





 public static void main(String args[])

 {





 // Create Scanner object for taking input from the user



 Scanner s=new Scanner(System.in);





 // Read a string from the user and store it in st



 String st=s.nextLine();

 



 // Convert string to char array



 char[] c=st.toCharArray();

 

 

  // Loop till end of the char array



  for(int i=0;i<c.length;i++)

  {



   

   // If char at index i is a space, then..

   if((c[i]==' '))

   {

   

    

    // If the character after space is a small alphabet i.e. ascii values of a-z are from 97-122

    

    if((c[i+1]>=97)&&(c[i+1]<=122))

    {





    /*





    At that position put capital of that alphabet,

    ascii values of A-Z are 65-90, so for every

    particular small and capital alphabet there is a difference of 32

    Also typecast to char from int.



 

    */



    c[i+1]=(char)(c[i+1]-32);





    }





   }



   

   // Make even the first letter capital

   else if(i==0)

   {



    

    // The same as above, but for the current char [first char]



    if((c[i]>=97)&&(c[i]<=122))

    {





    c[i]=(char)(c[i]-32);





    }





   }





  }





 // Show it to the user



 System.out.println("Capitalized: "+new String(c));



 

 }





}

I think every thing is clear as every statement is explained above, so it will be useful for the future reference too. Go ahead with the output.

Output

gowtham gutha

Capitalized: Gowtham Gutha

Note: No problem if spaces occur, they do not change. If you have any try trimming the spaces by calling st.trim() here and then convert it to char[]. The code might look like this.

Change, char c[]=st.toCharArray(); to

char c[]=st.trim().toCharArray();