Java program to capitalize first letter of each word in a String :
In this tutorial, we will learn how to capitalize first letter of each word in a string in Java. User will input one string and then we will capitalize first letter of each word and modify and save the string in a different String variable. Finally, we will output the String.
Java program :
import java.util.Scanner;
public class Main {
private static void print(String message) {
System.out.print(message);
}
private static void println(String message) {
System.out.println(message);
}
public static void main(String[] args) throws java.lang.Exception {
//1
String currentWord;
String finalString = "";
//2
Scanner scanner = new Scanner(System.in);
//3
println("Enter a string : ");
String line = scanner.nextLine();
//4
Scanner scannedLine = new Scanner(line);
//5
while (scannedLine.hasNext()) {
//6
currentWord = scannedLine.next();
finalString += Character.toUpperCase(currentWord.charAt(0)) + currentWord.substring(1) + " ";
}
//7
println("Final String : " + finalString);
}
}
Explanation :
The commented number in the above program denotes the steps number below :
-
Create one String variable currentWord to save the current scanned word and one different variable finalString to save the final String.
-
Create one Scanner variable to scan the user input string.
-
Ask the user to enter the string and store it in line variable.
-
Next, create one more Scanner object scannedLine. Note that we are passing line variable while creating this object. So, the Scanner will basically start scanning from this string variable line.
-
Start one while loop and scan the line word by word.
-
Store the current word in string variable currentWord. This while loop will read word by word. We are changing the first character to upper case of a word and then adding the next letters of that word. And,finally we are adding one space after that word. So, for example, the word hello will become Hello.
-
After the loop is completed, we have the result string stored in variable finalString. So, print out the final string finalString.
Example Output :
Enter a string :
this is a test string
Final String : This Is A Test String