In this post, we will learn How to Capitalize First Letter in Java Programming Language. Let’s understand Strings in Java and about methods of the String class in Java.
Let’s see the How to Capitalize First Letter in Java.
How to Capitalize First Letter in Java
import java.util.*;
public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
String word = sc.next();
//getting the firstLetter
String firstLetter = word.substring(0,1);
//word after removing first letter
String substr = word.substring(1);
// Capitalizing the first letter and attaching it back to the substring
String capWord = firstLetter.toUpperCase() + substr;
System.out.println(capWord);
}
}
Output
Enter the word : asgard
AsgardHow Does This Program Work?
Scanner sc = new Scanner(System.in);
System.out.println("Enter the word : ");
String word = sc.next();
In this program, we first take input of the word from the user using the Scanner Class.
//getting the firstLetter
String firstLetter = word.substring(0,1);
Then, we split the first letter from the given string using the substring(0,1) function to split the substring from string from index 0 to index 1(exclusive), i.e. 1-1 = 0, so by this we get the first letter removed and we store it in the variable named firstLetter.
//word after removing first letter
String substr = word.substring(1);
Then, we stored the rest split sub-string without the first letter in the variable substr.
// Capitalizing the first letter and attaching it back to the substring
String capWord = firstLetter.toUpperCase() + substr;
Then, using the toUpperCase() function we capitalize string. We capitalize the first letter and concatenate it back to the substring and make the work back with the capitalized first letter.
System.out.println(capWord);
Then, we display the new string with capitalized first letter in it. This is the Java Program to Capitalize first letter of String.
This is How to Capitalize First Letter in Java.
Conclusion
I hope after going through this post, you understand How to Capitalize First Letter in Java. We learned the Java Program to Capitalize the First Letter of String.
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