Answered Essay: In a new file write a program that using a Scanner reads a file name i


In a new file write a program that using a Scanner reads a file name input by the user. You should expect that the file name has one . (dot) character in it, separating the file name from the file’s extension. Extract the file extension (without the dot) and print it in lowercase letters only, and then print it again in uppercase letters only, and finally output it again the way it was originally entered. Your code must not assume the length of the input. For example if the user inputs MyFile.txt, the program should extract txt, if the user inputs index.html, the program should extract html.

Expert Answer


Copyable code:


import java.util.Scanner;

public class JavaApplication20



public static void main(String args[])


String str1,str2;


Scanner reader = new Scanner(;

System.out.println(“Enter a input filename: “);

String input = reader. nextLine();

String exten = input.split(“\.”)[1];

str1 = exten.toUpperCase();

str2 = exten.toLowerCase();

System.out.println(“The file extension: “+exten);

System.out.println(“The Uppercase for the file extension: “+str1);

System.out.println(“The Lowercase for the file extension: “+str2);

System.out.println(“The original input filename: “+input);



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