Java program to Capitalize the First and Last letter of Each Word of a String

October 14, 2022

Capitalize the First and Last letter

Today we will look at java program, we’re going to capitalize all the first and last character of the words in a string.

Lets understand with the help of an example.
Input String:- prepinsta
Output String:- PrepinstA

Capitalize The First and Last Letter in java

Algorithm

  • Take a string input from the user and store it in the variable called “s”.
  • Take a “newstr” variable initialize with an empty string.
  • Split the string into words and store it in the String array using regex.
  • Take a for-each loop and store the first character by using subString() and store it in the “firstchar” and rest of the string store in “restchar” .
  • Then add the “firstchar” and “restchar” string in “newstr”.

Code in Java

import java.util.Scanner;
public class CapitalizeTheFirstAndLastLetterOfString {
   public static void main(String[] args) {
     Scanner sc =new Scanner(System.in);
     System.out.print("Enter String : "); 
     String s = sc.nextLine();
     String newstr = "";

     String[] str = s.split("\\s"); // splitting sentence into word converted to String array

    for (String string : str) {     
      int length = string.length();
      String firstchar = string.substring(0, 1);
      String restchar = string.substring(1, length - 1);
      String lastchar = Character.toString(string.charAt(length - 1));
      newstr = newstr+firstchar.toUpperCase()+restchar+" ";
    } 
    System.out.println(newstr); 
  }
}

Output

Enter String : prep inst is best
PreP InstA IS BesT

Method 2 (Capitalize the First and Last letter)

class Main {
    static String FirstAndLast(String str)
    {
        // Create an equivalent char array of given string
        char[] ch = str.toCharArray();
        for (int i = 0; i < ch.length; i++) {

            // k stores index of first character and i is going to store index of last character.
            int k = i;
            while (i < ch.length && ch[i] != ' ')
                i++;

            // Check if the character is a small letter If yes, then Capitalise
            ch[k] = (char)(ch[k] >= 'a' && ch[k] <= 'z'
                               ? ((int)ch[k] - 32)
                               : (int)ch[k]);
            ch[i - 1] = (char)(ch[i - 1] >= 'a' && ch[i - 1] <= 'z'
                                   ? ((int)ch[i - 1] - 32)
                                   : (int)ch[i - 1]);
        }
        return new String(ch);
    }

    public static void main(String args[])
    {
        String str = "Prep insta";
        System.out.println("Input String:- "+str);
        System.out.println("String after Capitalize the first and last character of each word in a string:- "+FirstAndLast(str));
    }
}

Output

Input String:- Prep insta
String after Capitalize the first and last character of each word in a string:- PreP InstA
 
 

Toggle each character in a string

Count the number of vowels

Length of the string without using strlen() function

Prime Course Trailer

Related Banners

Get PrepInsta Prime & get Access to all 200+ courses offered by PrepInsta in One Subscription

Get Prime

19 comments on “Java program to Capitalize the First and Last letter of Each Word of a String”


  • KAVI VARSHINI K KIT

    import java.util.*;
    class HelloWorld {
    public static void main(String[] args) {
    Scanner sc=new Scanner (System.in);
    String s=”kavi varshini”;
    String[]k=s.split(” “);
    for(int i=0;i<k.length;i++)
    {
    char[]ch=k[i].toCharArray();
    ch[0]=Character.toUpperCase(ch[0]);
    ch[ch.length-1]=Character.toUpperCase(ch[ch.length-1]);
    k[i] = new String(ch);
    }
    String result = String.join(" ",k);
    System.out.println(result);
    }

    }


  • Aravind Nerella

    package com.weeknd;

    import java.util.Scanner;

    public class Program11 {
    static void find(String st)
    {
    char[] ar = st.toCharArray();
    String t = “”;
    if(ar[0]>=’a’&&ar[0]=’a’&&ar[ar.length-1]<='z')
    {
    ar[ar.length-1]-=32;
    }

    for (int i = 0; i < ar.length; i++) {
    System.out.print(ar[i]);
    }

    }

    public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    String st = scan.nextLine();
    find(st);

    }

    }


  • mstofficial19

    public static void main(String[] args) {
    // TODO Auto-generated method stub
    System.out.println(“Enter the String: “);
    Scanner sc=new Scanner(System.in);
    String string=sc.nextLine();
    String answer=””;
    String str[]=string.split(“\\s”);
    for(String s:str) {
    int length=s.length();
    String first=s.substring(0,1);
    String rest=s.substring(1,length-1);
    String last=s.substring(length-1);
    answer+=first.toUpperCase()+rest+last.toUpperCase()+” “;
    }
    System.out.println(answer);

    }


  • NAZIA KHAN

    String s=” aj5 8ehf edid c8dr 6gshN “;String r=””;
    r=r+Character.toUpperCase(s.charAt(0));
    for(int i=1;i<s.length()-1;i++){
    if(s.charAt(i+1)==' '|| s.charAt(i-1)==' '){
    r=r+Character.toUpperCase(s.charAt(i));
    }else{
    r=r+s.charAt(i);
    }
    }
    r=r+Character.toUpperCase(s.charAt(s.length()-1));
    System.out.print(r);

1 2