Advance Placement Computer Science is a computer science course that focuses on object-oriented programming and algorithmic thinking and development using Java. This course is offered by College Board as an opportunity for high schoolers to earn credits for a college-level computer science course. Here’s a snapshot of my Lab 5 which allows the user to input two strings. The program will-then check if the characters are all valid (space, a to Z, and %). The character % will be replaced by the second string. For example, if the user input, “This is %”, and “awesome”. The program will output “This is awesome”.