Username Generator using java

Write a program that asks a user for their first and last name (separately). The program then generates a username using the first letter of their first name, the first three letters of their last name and a random number between 100 and 999.

Note: Use the charAt and substring methods from the String class to construct the letter part of the user name.

Use the Random class to generate a number within the range.

A sample of the output is shown below:

Enter your first name: Sterling

Enter your last name: Archer

Username: SArc591

Tip: Assume that the user has a first and last name that is at least 3 letters long. Ticket Number Validation A ticket company is responsible for selling tickets for airlines, tours and other travel