How do we convert only the second letter of every word in a string to uppercase

Question

Is there any built-in function that capitalizes only a chosen letter of our choice, if not what is the code for it ?

For ex:

I want only the 2nd letter of every word to be capitalzed.

i love  ice creAMS ----> i lOve  iCe cReams 

Answer 1

The following code will perform your desired action:

public static void main(String[] args)

{

//Accept String

System.out.println("Enter you text here");

Scanner in= new Scanner(System.in);

String string=in.nextLine();

//Convert entire string to lower case

char ch[]=string.toLowerCase().toCharArray();

//second letter of every word is capitalised

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

{

ch[0]=Character.toUpperCase(ch[0]);

if (Character.isWhitespace(ch[i]) && Character.isLetter(ch[i+1]))

ch[i+2]=Character.toUpperCase(ch[i+2]);

}

String str= new String(ch);

System.out.println(str);

}

Answer 2

String string = "i love  ice creAMS";
        
        String[] str = string.toLowerCase().split(" ");
        
        StringBuilder sb = new StringBuilder();
        
        for (int i = 0; i < str.length; i++) {
            char[] subCh = str[i].toCharArray();
            
            for (int j = 1; j < subCh.length; j++) {
                if (Character.isLetter(subCh[j])) {
                    subCh[j] = Character.toUpperCase(subCh[j]);
                    break;
                }
            }
            sb.append(subCh);
            sb.append(" ");
            
        }
        String upgString = sb.toString().trim();
        
        System.out.println(upgString);

Comments

Hi.. Can you please explain what this for loop does in your code? I am confused.

for (int j = 1; j < subCh.length; j++) {
                if (Character.isLetter(subCh[j])) {
                    subCh[j] = Character.toUpperCase(subCh[j]);
                    break;
                }