Installation guide for Java. Step by Step Guide. A C A D G I L D Page 1

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1 Installation guide for Java Step by Step Guide A C A D G I L D Page 1

2 Installing Java, Android Studio Table of Contents 1. Introduction Minimum Requirements For Windows Minimum Requirements For Mac JAVA Installation on Windows STEP I - Un-Install Older Version(s) of JDK/JRE Download JDK Install JDK and JRE STEP II - How to set the Setting the PATH environment variable to run Java Version 7 Update 5 on Windows STEP III - INSTALL ECLIPSE IDE JAVA Installation on MAC Step 1: Check if JDK has been Pre-Installed Step 2: Download and Install JDK STEP 3 - To install Eclipse A C A D G I L D Page 2

3 1. Introduction JDK or JRE? JRE (Java Runtime) is needed for running Java programs. JDK (Java Development Kit), which includes JRE plus the development tools (such as compiler and debugger), is need for writing as well as running Java programs. Since you are supposed to write Java Programs, you should install JDK, which includes JRE. JDK Versions The various JDK versions are: 1. JDK Alpha and Beta (1995): Sun announced Java in September 23, JDK 1.0 (January 23, 1996): Originally called Oak (named after the oak tree outside James Gosling's office). Renamed to Java 1 in JDK JDK 1.1 (February 19, 1997): Introduced AWT event model, inner class, JavaBean, JDBC, and RMI. 4. J2SE 1.2 (codename Playground) (December 8, 1998): Re-branded as "Java 2" and renamed JDK to J2SE (Java 2 Standard Edition). Also released J2EE (Java 2 Enterprise Edition) and J2ME (Java 2 Micro Edition). Included JFC (Java Foundation Classes - Swing, Accessibility API, Java 2D, Pluggable Look and Feel and Drag and Drop). Introduced Collection Framework and JIT compiler. 5. J2SE 1.3 (codename Kestrel) (May 8, 2000): Introduced Hotspot JVM. 6. J2SE 1.4 (codename Merlin) (February 6, 2002): Introduced assert, non-blocking IO (nio), logging API, image IO, Java webstart, regular expression support. 7. J2SE 5.0 (codename Tiger) (September 30, 2004): Officially called 5.0 instead of 1.5. Introduced generics, autoboxing/unboxing, annotation, enum, varargs, for-each loop, static import. 8. Java SE 6 (codename Mustang) (December 11, 2006): Renamed J2SE to Java SE (Java Standard Edition). 9. Java SE 7 (codename Dolphin) (July 28, 2011): First version after Oracle purchased Sun (called Oracle JDK). 10. Java SE 8 (March 18, 2014): included support for Lambda expressions, default methods, and JavaScript runtime. A C A D G I L D Page 3

4 2. Minimum Requirements For Windows You should meet the following minimum requirements: Component Minimum CPU Memory 1 GHz or greater 1 GB (Minimum) 2GB (Recommended) Hard Disk Host OS 16GB available disk space Windows 7 Pro / Ultimate, Windows 8* / 8 Pro, Windows Server 2008 or greater A C A D G I L D Page 4

5 3. Minimum Requirements For Mac You should meet the following minimum requirements: Component Minimum Memory 1 GB (Minimum) 2GB (Recommended) Hard Disk Host OS 16GB available disk space Any Intel-based computer running OS X 10.8 (Mountain Lion) or later. Administrator privileges. Note that installing the JDK on OS X is performed on a system wide basis, for all users, and administrator privileges are required. You cannot install Java for a single user. 4. JAVA Installation on Windows 4.1 STEP I - Un-Install Older Version(s) of JDK/JRE I recommend that you install the latest JDK, but it can be messy if you have multiple versions of JDK/JRE. If you have previously installed older version(s) of JDK/JRE, un-install ALL of them. Run "Control Panel" Program and Features Un-install programs begin with "Java", such as "Java SE Development Kit" and "Java SE Runtime". If you are not sure whether you have older version(s) of JDK, check! Download JDK 1. Go to Java SE download 2. Under "Java SE 8ux", click the "Download" button under "JDK". 3. Check "Accept License Agreement". 4. Choose your operating platform, e.g., Windows x86 for 32-bit Windows OS or Windows x64 for 64-bit Windows OS. You can check whether your Windows OS is 32- bit or 64-bit via "Control Panel" System Under the "System Type" Install JDK and JRE Run the downloaded installer (e.g., "jdk-8uxx-windows-x64.exe"), which installs both the A C A D G I L D Page 5

6 JDK (Java Development Kit) and JRE (Java Runtime). By default, the JDK will be installed in directory "C:\Program Files\Java\jdk1.7.0_xx", where xx denotes the latest upgrade number; and JRE in "C:\Program Files\Java\jre8". For novices, accept the defaults. Simply click "next"..."next"... to install JDK in "C:\Program Files\Java\jdk1.8.0_xx" and JRE in "C:\Program Files\Java\jre8". Take note of your JDK installed directory (which you will need to use in the next step). Check the JDK installed directory by inspecting these folders using Windows Explorer. 4.2 STEP II - How to set the Setting the PATH environment variable to run Java Version 7 Update 5 on Windows 7 1. Left-click on the Windows Explorer icon (the yellow folder on the toolbar at the bottom of your computer screen. Then type this into the textbox at the top of the Windows Explorer window: Control Panel\System and Security\System and then click enter. A C A D G I L D Page 6

7 And this window will now look something like this, Click "Advanced system settings" on the left of this window. A C A D G I L D Page 7

8 2. Then you will see this. Next, click on the "Environment Variables" button. A C A D G I L D Page 8

9 3. Under either "User variables" or "System variables", you should find "Path". Highlight this variable: And then click "Edit..." The path will probably already be set to include several directories. Use the right arrow curser key to scroll to the end of the "Variable value:" textbox. Then type a semicolon at the end of the existing path, followed by the name of the java executable directory (either C:\Program Files (x86) \Java\jdk1.7.0_05\bin or C:\Program Files\Java\jdk1.7.0_05\bin, depending on whether you downloaded the 32-bit or 64-bit version of Java. 4. Click "OK" several times (in order to close all of the System windows) and then restart your computer. A C A D G I L D Page 9

10 4.3 STEP III - INSTALL ECLIPSE IDE I choose to use the Eclipse IDE for Java Developers (128mb). You can download it here - Download "Eclipse IDE for Java Developers" from here You will receive a rar file in "~/Downloads" folder. - This is a zip file and does not require installation. Just extract it. - To start Eclipse, open the "eclipse" folder and click on the "Eclipse" icon. Note : Make sure the JDK and Eclipse belongs to same bit version. If JDK is 64 bit then download eclipse also 64 bit. If JDK is 32 bit then download eclipse also 32 bit. 5. JAVA Installation on MAC 5.1 Step 1: Check if JDK has been Pre-Installed In some Mac systems (earlier than Mac OS X 10.7 Lion), JDK has been pre-installed. To check if JDK has been installed, open a "Terminal" (Go Utilities Terminal) and issue these commands: $ javac -version If a JDK version number is returned (e.g., JDK 1.x.x), then JDK has already been installed. If message "command not found" appears, JDK is NOT installed. Proceed to the "Step 2: Download and Install JDK". If message "To open javac, you need a Java runtime" appears, select "Install" and follow the instructions to install JDK. Then, proceed to "How to Install Eclipse on Mac". 5.2 Step 2: Download and Install JDK 1. Goto 2. Login with your AppleID. 3. Download "Java for Mac OS X {10.x} Update {u} Developer Package (DMG)". Choose {10.x} according to your Mac OS X version and the latest {u}. A C A D G I L D Page 10

11 4. Double-click to install the downloaded Disk Image (DMG) file. 5. Eject the DMG file. 6. To verify your installation, open a "Terminal" and issue these commands: // Check the version of "javac" (Java Compiler) and "java" (Java Runtime) $ javac -version javac 1.x.x_xx $ java -version java version "1.x.x_xx" A C A D G I L D Page 11

12 Course Name Java(TM) SE Runtime Environment (build 1.x.x_xx-xxx) Java HotSpot(TM) Client VM (build 22.1-b02, mixed mode, sharing) // Find the location of programs "javac" (Java Compiler) and "java" (Java Runtime) $ which javac /usr/bin/javac $ which java /usr/bin/java 5.3 STEP 3 - To install Eclipse 1. Download Eclipse from Choose "Mac OS X" "Eclipse IDE for Java Developers" (or "Eclipse Classic"). You will receive a TAR file (e.g., "eclipse-java-juno-sr1-macosx-cocoa-x86_64.tar.gz") in "~/Downloads" folder. 2. Double-click the downloaded TAR file to expand it into an folder called "eclipse". 3. Drag the expanded "eclipse" folder to the "Applications" folder. To start Eclipse, open the "eclipse" folder and click on the "Eclipse" icon. You may drag the "Eclipse" icon to the dock. Notes: To uninstall Eclipse, drag the "/Applications/eclipse" folder to trash. A C A D G I L D Page 12