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Taking a college-level programming course? Maximize your learning with these Java tutorials. Peggy Fisher explores command-level programming, basic techniques such as managing loops and creating methods, debugging Java code, working with classes and objects, and storing and sorting arrays. Along the way, she investigates the Java API and Java's capabilities for running simulations and algorithm analysis, and issues challenges to write programs that utilize all of these Java features.
Lecturer at Penn State UniversityPeggy Fisher is a programmer and content manager at LinkedIn Learning.
Peggy's main focus is application programming in Java, Arduino, and C++. She has also worked on courses in COBOL and discrete ,athematics. Previously she was a faculty member at Penn State University's College of Information Sciences and Technology. She started out as a programmer working for a large insurance company, but after 18 years she left her job as a director of information technology to pursue her true passion teaching. She earned a master's degree in math education, and went on to teach high school math and computer science in Pennsylvania. In 2012, Peggy accepted a position as an instructional designer at Penn State, and shortly thereafter began teaching Intro to Application Programming with Java. She is a strong supporter of women in STEM. As one of the few female programming teachers, she serves as a mentor to incoming female freshmen who are considering a career in programming. She was also the K–12 outreach coordinator for the college, where she scheduled, ran, and taught summer camps for middle school and high school students. In a PBS NewsHour interview, she expressed that all students should take at least one programming class either in high school or college. Peggy enjoys constantly learning and finding new and exciting ways to bring technology to life in and outside of the classroom, such as using Arduino microcontrollers or Lego Mindstorms, to help make learning hands-on and fun.
Skills covered in this course
- The last type arrays that we're gonna talk about is an ArrayLists. There are several important differences between an ArrayList and an array. An ArrayList can only hold objects, such as Strings. When using an ArrayList, you can increase and decrease the size dynamically. To access the elements in an ArrayList, we use the .get method, and to update elements in an ArrayList, we use the .set method. If we wanna add an element, we just use the .add element. We don't have to worry about the size of the ArrayList, it'll automatically grow as we need it to. And if you wanna take away an element, or delete an element, you can use the .remove method. Remember our pizza shop? We mentioned that it might be nice to keep track of more than one pizza at a time. So let's see what happens when use an ArrayList to hold our pizza objects. Here's the main program for the PizzaShop. At the top, I've already gone ahead and imported the java.util.ArrayList;. I'm gonna scroll down a little bit, what we'll…
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