Dear students, Today’s a bit of a clean-up day. There are some ideas that didn’t quite fit into our previous discussions, and I’ve also had the chance to see your code a few times now and want to address some concerns. Let’s have a day of miscellany. What’s Wrong With This? There are two dimensions […]
Dear students, We have been looking at the computer’s role as a calculator, but we will deviate from this theme today. Numbers are not the only thing that computers are good at crunching. They are also really good at crunching communication. They can send out our words (and propaganda) as fast as electricity travels. So, […]
Dear students, We’re going to start with a little game. You will pick a number, I will present to you a series of sheets with numbers written on them, you will tell me if your number is present, and I will tell you what your number is. It’ll be a little bit of magic! Or […]
Dear students, Today we introduce the Math class. This class has a bunch of pre-written recipes for computing various mathematical operations. We can see what it all provides by looking at its documentation. I usually find the documentation for a class by searching java ClassName in my favorite search engine. The Math class is full […]
Dear students, Last time we started writing programs that performed little mathematical calculations for us. We used text to talk to the user in a more friendly way than the calculator. We used int for whole number data, and double for numbers with fractions. We used Scanner to get input. Writing programs is a new […]
Dear students, Last time we inspected several programs and formulated these several decrees made by the designers of Java that explain why our programs are what they are: Decree 1: There is data and there are instructions. Decree 2: Code can be ours, or it can be someone else’s. Decree 3: Data can be mailed […]
Dear students, Welcome to CS 145: Programming for New Programmers or CS 148: Programming for Experienced Programmers! It’s important to me that we have a comfortable working relationship. We are, after all, on the same team. You wanted to prepare yourself for a bright future, and so you asked me to give you some homework […]
Dear students, Today we wrap up our course. Let’s recount what happened this semester. In week 1 we examined Kotlin, a language that many of us hadn’t used before—myself included. It seemed like the right thing to do, and that decision was recently validated by Android chief advocate Chet Haase at Google I/O: We’re announcing […]
Dear students, Today we will create an app called Two-Face that allows the user to take a split image on the front-facing camera. The left half and right half are taken at separate times. We will use the new CameraX API that was just announced at Google I/O. Before I forget, here’s your final TODO: […]
Dear students, Today we will create an app called Recog that presents anagrams for the user to unscramble. But instead of typing, the user will speak the answer. We’ll use Android’s speech recognition facilities to make this happen. Next lecture we will explore the new CameraX API that was just announced at Google I/O 2019. […]