Write a single Java program named CheckIdentifiers.java that reads in a line of characters and prints out whether the line of characters is a legal Java identifier. Use a simple prompt of:

As mentioned in the text, a Java identifier consists of one or more characters. The first character must be an uppercase or lowercase letter of the alphabet, an underscore ( _ ), or a dollar sign ($). Each remaining character must be an uppercase or lowercase letter of the alphabet, a digit 0-9, an underscore, or a dollar sign.

Please enter a valid Java identifier:

The following are the ONLY messages that you will need to display based on what you find:

"At least one character is needed!"

"Illegal first character: " followed by the concatenated illegal character entered

"Legal identifier"

"Illegal character: " followed by the concatenated illegal character entered

So that you do not have to use the Java try statement, sometimes referred to as the try-catch, add the following import statement above the class statement:

import java.io.*;

and add the following at the end of the main method header statement:

throws IOException