APCS Java

You can get a lot of insight in how coding works and how an Integrated Development Environment (IDE can help the process of compiling, and executing the code you write.

Installing the Java JDK 8 SE on Windows 10 for learning AP Computer Science A.  Links mentioned in the video:mathorama.com/wikiSummer Assignment Links linksjava se jdk8 downloads.htmlhttps://bluej.org/versions.html Subscribe to APCS Java

Stage 3 Enemies are made and tested. Video Source code is at http://apcs.mathorama.com/index.php?n=Main.SimpleGameTutorial and the game is at http://www.mathorama.com/ChickenLittle.html If you missed Stage 1, you can get it at http://www.youtube.com/watch?v=u459QHRepC8 or https://archive.org/details/GameAppletStage1. Stage 2 can be found at https://archive.org/details/GameAppletStage2

Stage 2 of the Game Applet is making the player and have it be controlled with keyboard input. Source code is at apcs.mathorama.com and the game is at www.mathorama.com/ChickenLittle.html Video YouTube If you missed Stage 1, you can get it at here

Stage 1: Load the art and sounds to your eclipse project, so you can export your game into a .jar file to easily upload to a web site.  You can get to the game and the source files at: Link to Game Link to Source Code Link to Video Link to Video on YouTube

Gridworld Overview Video

Making Images With GIMP You can download from http://www.gimp.org I show how to use some features in GIMP (from www.gimp.org) a open source image editor to use with your programs.  First, drawing a picture from scratch, then cleaning up a photo, and finally tracing a photo to make a simple "cartoon" like image.  For more info on where I used these images, see http://apcs.mathorama.com/ 

Installing BlueJ 2012 Video Here is a 2012 version to check to make sure your Java SDK and BlueJ IDE installation is working correctly. While I'm using Ubuntu 12.04 to show this, it works pretty much the same in Windows and OSX.

Here is a customized World for Gridworld where the message on the top is updated to show how many bugs there are and the location of the furthest Bug in the grid. You need to implement the Comparator interface for the grid world Bug class. You need to define a compare method that returns an int. Get the location of each Bug and use the compareTo method of Location. Here is the starter code: apcs.mathorama.com mpeg4 movieQuicktime movie

Part 3 of the One to Ten Game which explains the Player Class. You can see a working copy at http://www.mathorama.com/OneToTenConsole.html

Part 2 of 3 of the One to Ten Game

In this tutorial, we make a game called "1 to 10" rather than tic-tac-toe (naughts and crosses). We will construct A Board Class in the first part along with a tester class. The idea is to move a page either one or two positions, and the one in the last position loses. The strategy is not to difficult, so eventually we can make a robot player who will always play perfectly.

Make a new object that represents a dot using the eclipse IDE.

If you want to publish your Applet to the web, you probably need to make a Java Archive, or JAR file that allows you to embed your Applet in a web page

How to get what you need installed on your Windows 7 machine

To make a variety of Poker games, we need a way to evaluate and compare Poker hands. This video also shows how to implement an interface in an inner class, so that a user can press a button, and new poker hands are generated. Starter code can be found at the APCS Wiki.

Implementing java interfaces for any Object. For "starter" code see the APCS Wiki

We introduce a way to use code to work with a variety of classes using interfaces. Source code can be found at the APCS Wiki

Make mew Projects and Classes in Eclipse.

Click on the title to see the video. Here I show how to try the code snippets that you will see while reading Chapter 2 of Horstmann, "Java Concepts"

Starting Code:import java.util.Scanner;/** * Simple Polyalphabetic Cryptography * * @Chris Thiel * @28 Feb 2009 */public class VignereCipherStartingCode{ private static final String alphabet="ABCDEFGHIJKLMNOPQRSTUVWXYZ"; private static int nextChar(String k, int i){ i=i%k.length(); String letter=k.substring(i,i+1); return alphabet.indexOf(letter); } public static String encode (String m, String k){ String result=""; for (int i=0; i<m.length(); i++){ int offset=nextChar(k, i); String letter = m.substring(i,i+1); int newLetterIndex= alphabet.indexOf(letter)+offset; newLetterIndex=newLetterIndex % 26; result+=alphabet.substring( newLetterIndex, newLetterIndex+1); } return result; } public static String decode (String m, String k){ String result=""; return result; } public static void main(String[] args) { Scanner kb=new Scanner(System.in); System.out.print("Type a key: "); String key=kb.nextLine(); key=key.toUpperCase(); key=key.replace(" ","");//omit spaces System.out.print("Type a message: "); String message=kb.nextLine(); message=message.toUpperCase(); message=message.replace(" ",""); System.out.println("Using the key \""+key+"\" on \""+message+"\":"); String codedMessage=encode(message,key); System.out.println("Coded="+codedMessage); System.out.println("Decoded="+decode(codedMessage,key)); System.out.println("Using the key 'LOVE' we encode 'BOOHOO' we should get 'MCJLZC' : "+encode("BOOHOO","LOVE")); System.out.println("Using the key 'QUICK' we decode 'TOKMXEQ' we should get 'DUCKNOW': "+decode("TOKMXEQ","QUICK")); }}8 points: Complete the decode method so it can decipher the Vignere Cipher9 points: Adapt this so it can do a Progressive Polyalphabetic Cipher rather than a key10 points: Adapt the CarTalk Employee Applet's graphic user interface so that you can type a message in one text area, press a button and it shows the encoded text (using the Progressive Cipher), press another button and it shows the decoded text.11 points: Add a "key field" to the Applet, and use the Vignere Cipher, working in a similiar fashion as the 10 point version

Overview of how to design a program that checks for patterns of matching words to detect plagiarism.