Questions tagged [java]
Questions about instruction specific to the programming language Java. Use this tag only when the language used would affect the question significantly (if your question uses Java as an example, but does not focus on the language itself, you need not use the tag).
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Curriculum choice for AP Computer Science A
We are currently researching what curriculum to use/adapt for the 2019-2020 school year. It will be our first year offering AP CSA. The students taking the class will have had 3-7 years of computers ...
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Parent class variable pointing to Child class
Given the following:
Dog rover = new Puppy("rover"); // Where Puppy extends Dog
A student asked why would you ever want or need a Dog variable point to ...
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Best books for solid foundation build up for python and java
Fellow programmers. I am currently learning java and python in my Master's degree (introduction) and I did those languages 2 years ago. And when I revisited for the units I feel like I have basic ...
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Explaining how an Interface is a contract
When teaching Interfaces (in Java, for example), it is common to describe them as a contract. Which means that if a class implements an interface, it has to use the methods in the interface.
As an ...
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Teaching the tradeoffs of the foreach loop
Edit: It's been quite a while since I posted this question, and in the intervening time, I have come to love the foreach loop. However, in order to avoid invalidating answers, I leave the text ...
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What's a good example of a static factory method returning instances of subclasses?
One benefit of having a class provide a static factory method rather than public constructors is the method can return an instance of a subclass.
For example, if the class ...
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Getting started on contributing to open source and making software
I’m just graduated high school. I learnt java in high school, but the java I learnt was taught on bluej and we weren’t taught to create any software or anything. I want to start contributing to open ...
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Best book and video lecture series to follow for an "object oriented programming" course for advanced undergraduates
I am looking for an elegant textbook to be followed for self-study in an objected oriented programming course at the undergraduate level. Our course is as shown:
I humbly request you to suggest to me ...
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How to learn Java as a beginner?
I want to start learning Java from scratch. But as a beginner, I don't know where to start or what to learn first. I have basic knowledge in C++ but Java is an entirely new area to me. Can anyone give ...
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AP Computer Science A vs. OCP
Out of my own interest, I have been self-learning Java over the past few months.
I decided I should take this to a greater advantage, so I have been considering taking the OCP (Oracle Certified ...
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My teacher said that java is pass-by-reference when the type is not a primitive
I am an undergrad student. I am an experienced programmer. For reasons out of the scope of this question, I ended up in a class where basic things about C++ and Java are being taught (but I already ...
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Cheating detection script [duplicate]
The pandemics has incredibly increased the number of cheating cases. Do you know of any script (bash or other scripting language) for checking a bunch of Java code submissions for similarity? I know I ...
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When mentoring individuals, teach clean coding and simple/effective thinking or let them do it their way?
I have a background of 20+ years professional coding, but my heart is really in teaching. About three years ago, I started tutoring ages grade 6 through adult in coding topics.
introduction to coding ...
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Is there a Java library for testing command line applications?
JUnit seems to work well for unit tests, but I'm not interested in unit tests, I want to test and entire command line application as a black box.
I have created a text-based adventure game project for ...
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Java: The Complete Reference, which edition to follow
Java is updating on a regular basis and it being so the corresponding text books to study Java also changes. Now I do not know why the edition "Java 2: The Complete Reference" by Herbert ...
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JavaFX and console-based interfaces, at the CS1 level
I'm running into some annoying technical problems in trying to incorporate JavaFX into my CS1 class, mainly arising from the constraints of avoiding/minimizing material they haven't yet learned. ...
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methods early in Java - before objects
Does it make sense to introduce methods even before objects? What we are attempting to do is to get students out of the "everything in main()" mode as soon as possible.
Suppose one starts out with a ...
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First project in my second year data structures intro
I am currently teaching the pretty much normal second year Data Structures and Algorithms course. In this course there are four programming projects, with the first project completed the automated ...
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What autograding software do folks use for Java code?
Grading currently either takes me a huge amount of time, or gets done in an extremely cursory way. It occurs to me that, if my students were able to submit code into some sort of autotester, they ...
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Spring core exercices
I'm actually studying (free studying using online books) to pass the Pivotal Spring core certification and i need some exercices (online or pdf) to practice in order to master the framework as well, ...
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What are good sample programs for learning to use a debugger?
One skill I teach students in Java 1 is how to use a debugger, specifically:
single-stepping through code
using breakpoints
viewing the values of variables
going up and down the call stack
I have ...
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Example for Introduction to Generics in Java
What are some good example classes for introducing generics in Java?
I'm introducing this in the context of implementing ArrayList, but I don't want my first ...
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How to make project in java language, for students who doesn't know java?
In CS I have been taught other programming languages than java. Now in final year project they are demanding project in java. So is there an easy technique to learn java fast?
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Java or Kotlin for beginners (procedural programming knowledge is existing)?
We are teaching an "introduction to cs" course (bachelor level) and in the first half of a year students are learning the fundamental principles of procedural languages. We are using python 3 and C as ...
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Why and how is it efficient to process sorted arrays than unsorted arrays?
It is well accepted that processing sorted arrays is easier and efficient. What would be the pedagogical approach to explain how and why it is more efficient to process sorted collections than ...
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Is it okay to teach C++ to my 7 year old brother?
I was thinking this for quite long, should i teach my little brother about programming in the age of 7-8? Because it will help him in the future in 12th standard and in university life. I want him to ...
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Mental Model of Type Conformance/Subtype Polymorphism
I'm finding that my CS2 students really struggle with the notions of type conformance and subtype polymorphism in Java. Say we have the following:
...
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Project based on game 2048
I'm thinking about an assignment based around the game 2048. This would be towards the end of a first programming course at the university level and assumes the students have been introduced to at ...
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Is there evidence of differences in the outcomes of objects-early vs objects-late?
Here is the essential parts of a (HS) Junior level question from one of our (Canadian) national computing challenges. (http://www.cemc.uwaterloo.ca/contests/computing/2017/stage%201/juniorEF.pdf)
...
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Example for For vs While Loop (in Java)
I'm looking for a set of concrete examples that illustrates good use cases of using a for vs a while loop for beginners. I feel ...
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How can we teach good naming practice for students learning Java?
In writing software we name things. In Java we name classes, interfaces, methods, variables, etc. How can we teach both the importance and the skill of choosing good names?
What teaching practices ...
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Use of jshell in AP CS A
I recently installed jshell in my IDE for use in demoing concepts in AP CS A. It came at just the right time as it was a powerful way to teach ArrayLists and its ...
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The impact of switching to Java 10
Java 9 and 10 were both released recently -- Java 9 was released on Sep. 21st, 2017 and Java 10 was released on Mar. 21st 2018. These two releases contain some very big changes: Java becomes modular ...
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Motivation for learning C++ when you know Java
I am going to teach a C++ course to students who already know Java. From answers to my previous question, I learned that C++ is substantially harder to master than Java, particularly because of the ...
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Using Oracle's Java Documentation as a Teaching Tool
I'm in the process of preparing for the second semester of AP CS A (Java). I want to review objects and classes with my students to prepare for our extended focus this semester on inheritance and ...
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Teaching OOP in Java, to students who already know Java
I am going to teach a course in object-oriented programming in Java, and am looking for materials - textbooks and slides. It is a course for 2nd-year undergrads. In the 1st year, they already learned ...
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Teaching C++ to students that know Java
I am now teaching an OOP course to 2nd year undergrads. This is actually a course in advanced programming in Java. In the next semester, I am going to teach the same students, a C++ course. From what ...
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The order of subjects in beginner's curriculum
This year I'll be an unofficial teacher assistant in the CS class of 9th graders.
Background
This question is about a curriculum for introducing students to programming in java.
The students are in ...
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Help in choosing elective subject
I am a student of B.Tech CSE and have an option to choose any one of the subjects in the next semester. Below are the options:
Enterprise Java
Digital Image Processing
Compiler Design
I want to ...
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Teaching intermediate Java to students familiar with C
The class I teach (a class whose teacher I assist1, to be precise) is learning intermediate Java this year (data structures, basic OOP and a few lessons about how Java actually works).
A few of the ...
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Choosing Java-like language for teaching web development
I just started teaching an introduction to web development to high school students (they have the most basic knowledge of java) and this year my school has decided to make a change in the curriculum.
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Using zyBooks and labs
Has anyone used zyBooks in their classes? I've seen some good comments on the SIGCSE list about them. I would primarily use this in our CS I class (Java) with their lab feature as a way to provide ...
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Framework choice for AP CS A students: Swing or JavaFX?
I attended an AP workshop this week to prepare for teaching AP CS A this coming school year. It gave me my first glimpse of Swing, which has now piqued my interest about including some GUI components ...
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How to illustrate scope problem when creating variables inside `if` statements in Java
One of the problems that my students will stumble upon every year is trying to create or initialize variables within an if/else ...
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Ideas for introducing databases to Android development students
I teach an Android development course to students who have had two full years of Java experience - including a year of data structures. In the past, my students have used services such as Firebase, ...
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Lesson plan for teaching java graphics
Background:
This lesson should give a firm foundation for graphics in Swing in java to students in high school who know OOP in java (...
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Command-line Java in AP CS A
Context: Over the past school year I spent a significant portion of my time preparing to teach AP CS A next year. From choosing textbooks to writing the College Board syllabus, I essentially started ...
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Most beneficial CodingBat problems for AP CS A FRQs
I love the CodingBat platform and plan to integrate it throughout my course next year. Yet, since it will be my first year with AP CS A and I have not yet had a chance to study past years' FRQs, I'm ...
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Lambda expressions exercises and practice
While lambda expressions in java 8 are really cool in action, the school curriculum offers no exercises in this. So essentially, students never actually learn how to use lambda expressions and the ...
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