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Program to capitalize first letter of words

Write a Java program to find the capitalize first letter of each word in a string.

This program is quite simple.

  • We split to break the string into words. 
  • Next we take one word at a time, capitalize first letter
    •  by adding capital of first letter concatanated with sub-string of next letters.
  • Now add this to a string buffer. Do not forget to add a space.

Here is the complete program 


import java.util.Scanner;

public class ReverseWords { 
 
 String capitalizeFirstLetter(String st){
        char ch = st.charAt(0);
        ch = Character.toUpperCase(ch);//first letter to capital
        String outStr = ch+st.substring(1);//first letter with substring of remaining
        return outStr;
    } 
 
     String wordCapitalize(String str){
        String arr[] = str.split(" ");//split into words
        StringBuffer buf = new StringBuffer();
        for(String st:arr){
            String st2 = capitalizeFirstLetter(st);
            buf.append(" ");//add a space
            buf.append(st2);//add word with first letter capital
         }
        return buf.toString();
    } 
 
    public static void main(String args[]){
        System.out.println("Enter a string:");
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();
        ReverseWords obj = new ReverseWords();
        String outStr = obj.wordCapitalize(str);
        System.out.println(outStr);
    }
}


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