This page describes how to install and uninstall JDK 8 for OS X computers.

DrJava is a lightweight programming environment for Java designed to foster test-driven software development. It includes an intelligent program editor, an interactions pane for evaluating program text, a source level debugger, and a unit testing tool. In addition to bug fixes, this stable release supports Java 7 in addition to Java 5 and 6.

This page has these topics:

• Developer Community for Visual Studio Product family. Please add Full Java Support in Visual Studio 2019 for both Desktop and Mobile platforms!
• Java SE Development Kit 8 1.8 for Mac is free to download from our application library. The actual developer of this free software for Mac is Oracle. The program lies within Developer Tools, more precisely General. Our built-in antivirus checked this Mac download and rated it as 100% safe.

See 'JDK 8 and JRE 8 Installation Start Here' for general information about installing JDK 8 and JRE 8.

See 'OS X Platform Install FAQ' for general information about installing JDK 8 on OS X.

System Requirements

Observe the following requirements:

• 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.

Installing the JDK also installs the JRE. The one exception is that the system will not replace the current JRE with a lower version. To install a lower version of the JRE, first uninstall the current version as described in 'Uninstalling the JRE'.

JDK Installation Instructions

When you install the Java Development Kit (JDK), the associated Java Runtime Environment (JRE) is installed at the same time. The JavaFX SDK and Runtime are also installed and integrated into the standard JDK directory structure.

Depending on your processor, the downloaded file has one of the following names:

• jdk-8uversion-macosx-amd64.dmg

• jdk-8uversion-macosx-x64.dmg

Where version is 6 or later.

1. Download the file.

   Before the file can be downloaded, you must accept the license agreement.

2. From either the Downloads window of the browser, or from the file browser, double click the .dmg file to launch it.

   A Finder window appears containing an icon of an open box and the name of the .pkg file.

3. Double click the package icon to launch the Install app.

   The Install app displays the Introduction window.

   
   

   Note: In some cases, a Destination Select window appears. This is a bug, as there is only one option available. If you see this window, select Install for all users of this computer to enable the Continue button.

   
   

4. Click Continue.

   The Installation Type window appears.

5. Click Install.

   A window appears that says 'Installer is trying to install new software. Type your password to allow this.'

6. Enter the Administrator login and password and click Install Software.

   The software is installed and a confirmation window appears.

7. Refer to http://www.oracle.com/technetwork/java/javase/downloads/jdk-for-mac-readme-1564562.html for more information about the installation.

8. After the software is installed, delete the .dmg file if you want to save disk space.

Determining the Default Version of the JDK

If you have not yet installed Apple's Java OS X 2012-006 update, then you are still using a version of Apple Java 6 that includes the plug-in and the Java Preferences app. See 'Note for Users of OS X that Include Apple Java 6 Plug-in'.

There can be multiple JDKs installed on a system, as many as you wish.

When launching a Java application through the command line, the system uses the default JDK. It is possible for the version of the JRE to be different than the version of the JDK.

You can determine which version of the JDK is the default by typing java -version in a Terminal window. If the installed version is 8u6, you will see a string that includes the text 1.8.0_06. For example:

To run a different version of Java, either specify the full path, or use the java_home tool:

For more information, see the java_home(1) man page.

Uninstalling the JDK

To uninstall the JDK, you must have Administrator privileges and execute the remove command either as root or by using the sudo(8) tool.

For example, to uninstall 8u6:

Do not attempt to uninstall Java by removing the Java tools from /usr/bin. This directory is part of the system software and any changes will be reset by Apple the next time you perform an update of the OS.

(P)Bookmarks.dev - Open source Bookmarks and Codelets Manager for Developers & Co. See our How To guides to help you get started. Share your favorites bookmarks with the community and they might get published on Github -

Well, I’ve recently gone to the “silver” side and acquired a MacBook Pro to use it for development when I am not at my PC. By development I mean here mainly Java + Javascript development. So I’ve written this post to remember what I had to install/configure to achieve this goal.

I need to mention that until now I’ve been a user of Windows (XP/7) and Linux (Ubuntu/Mint/Cent OS) operation systems.

At the time of this writing MacBook Pro runs on OS X Yosemite Version 10.10.5. The new version El Capitan was available, but I didn’t do the upgrade first because it had to many bad reviews…

Contents

• JDK
• Extras
  • Keyboard shortcuts
  • MySQL
  • Terminal window

JDK

So first things first- installe a Java Development Kit (JDK), which is a software development environment used for developing Java applications and applets. It includes the Java Runtime Environment (JRE), an interpreter/loader (java), a compiler (javac), an archiver (jar), a documentation generator (javadoc) and other tools needed in Java development.

Download the Mac OS X x64 .dmg files version

You can find out where the JDK is installed, by executing the /usr/libexec/java_home -v 1.7 , on the terminal command:

You will need to know this when setting up a project in IntelliJ for example.

Set JAVA_HOME

JAVA_HOME is just a convention, usually used by Tomcat, other Java EE app servers and build tools such as Maven to find where Java lives.

In Mac OSX 10.5 or later, Apple recommends to set the $JAVA_HOME variable to /usr/libexec/java_home, just export $JAVA_HOME in file ~/.bash_profile or ~/.profile

Maven

With the JAVA_HOME environment variable configure, go to the Apache Maven Downloads website, download the .tar.gz or .zip archive and unpack it in a folder of your choice – I put it under the /opt directory:

It is also recommended to create a symbolic link to the Maven home, so that when let’s say you update your Maven version, you’ll only have to change the symbolic link target:

Then set Maven in the environment variables

Close the terminal and open a new one. When you try now to get the maven versioning you should get something like the following:

An alternative is to use Homebrew and execute the following command:

GIT

Open a terminal window and type the following command for example:

At the next moment you will be asekd to install Xcode. This is the a complete developer toolset for building apps that run on Apple TV, Apple Watch, iPhone, iPad, and Mac. It includes the Xcode IDE, simulators, and all the required tools and frameworks to build apps for iOS, watchOS, tvOS, and OS X (it also contains GNU Compiler Collection-gcc).

You can do the above, but if you do not want everything from that package you can install Homebrew (“Homebrew installs the stuff you need that Apple didn’t.”) and run the following commands:

Either way once Git is installed the initial command git –version will bring the installed version:

If you are working with Github, I recommend you also install the Github Desktop

IntelliJ

In the mean time IntelliJ has become my favorite IDE, mainly because you have almost the same feature support when doing front-end development. To install it, go to the download page and follow the installation instructions:

INSTALLATION INSTRUCTIONS

• Download the idea-15.dmg OS X Disk Image file.
• Mount it as another disk in your system.
• Copy IntelliJ IDEA to your Applications folder

Once done you need to get acquainted with key shortcuts for OS X – IntelliJ IDEA Mac OS X Keymap

Extras

Keyboard shortcuts

General

Please visit](https://support.apple.com/en-us/HT201236) for usual keyboard shortcuts (Cut, copy, paste, and other common shortcuts, document shortcuts etc.)

Finder

• Shift + cmd + C > go to Computer
• Shift + cmd + H > go to Home folder
• Shift + cmd + D > go to Desktop

A quick access with the mouse to the same folders is by dragging and dropping them on the sidebar under Favorites

As long as we are by sidebar subject, a good productivity gain can be achieved by using Smart Folders – these folders let you save a search to reuse in the future. Smart Folders are updated continuously, so they always find all the files on your computer that match the search criteria. Watch the following video to see how you can easily add them to the sidebar

NodeJS

Node.js® is a JavaScript runtime built on Chrome’s V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js’ package ecosystem, npm, is the largest ecosystem of open source libraries in the world. Recently is a must have tool if you need to do fancier stuff on your front-end part of your application.

Go to https://nodejs.org/ and download the latest version for OS X (x64). Double click on the node-v4.2.2.pkg file (latest stable version at the writing of the post) and follow the installation instructions steps.

When ready open a terminal window and check the version installed to see if it is working:

MySQL

Go to Downloads page – http://dev.mysql.com/downloads/mysql/, download the Mac OS X 10.10 (x86, 64-bit), DMG Archive and follow the steps described in the installation guide.

Start, stop server

The MySQL Installation Package includes a MySQL preference pane that enables you to start, stop, and control automated startup during boot of your MySQL installation.

This preference pane is installed by default, and is listed under your system’s System Preferences window, which can be found under Applications.

Access MySQL from command line

Basically need to add MySQL to the PATH variable. Edit the /~.bash_profile with the following:

To test that it’s working start a new terminal and verify mysql version from command line:

Install MySQL Workbench

If you want to have also a GUI on top of it I recommend you install the MySQL Workbench that can be also found in the downloads section. Installation instruction is the same as the MySQL server installation.

Terminal window

Set background black

Open Terminal, then go to the Terminal menu -> Preferences, choose the Settings tab and set the Pro theme as the default.

Jump to beginning/end of a line

To jump at

• beginning of a line – Ctrl+A
• end of a line – Ctrl+E
• jump between words – Alt+</>

Open terminal in here

Go to:

Enable New Terminal at Folder. There’s also New Terminal Tab at Folder, which will create a tab in the frontmost Terminal window (if any, else it will create a new window). These Services work in all applications, not just Finder, and they operate on folders as well as absolute pathnames selected in text.

You can even assign command keys to them.

Services appear in the Services submenu of each application menu, and within the contextual menu (Control-Click or Right-Click on a folder or pathname).

The New Terminal at Folder service will become active when you select a folder in Finder. You cannot simply have the folder open and run the service “in place”. Go back to the parent folder, select the relevant folder, then activate the service via the Services menu or context menu.

In addition, Lion Terminal will open a new terminal window if you drag a folder (or pathname) onto the Terminal application icon, and you can also drag to the tab bar of an existing window to create a new tab.

Finally, if you drag a folder or pathname onto a tab (in the tab bar) and the foreground process is the shell, it will automatically execute a “cd” command. (Dragging into the terminal view within the tab merely inserts the pathname on its own, as in older versions of Terminal.)

You can also do this from the command line or a shell script:

This is the command-line equivalent of dragging a folder/pathname onto the Terminal application icon.

Use aliases

To ease your life for long and usual commands use aliases. For example to connect remote instead of typing ssh ama@x.y.z.q and having to remember ip address or server name, you could just type rmcon (or whatever it’s easy for you to remember). To do that append to the .bash_profile in your home directory the alias command and then source the file:

I can’t stress enough, how much comfortable your life can become, if you are using aliases the right way - A developer’s guide to using aliases

Commands

Java Jdk Mac

Find out who is listening on port (e.g. 8080)

iTerm2

Java Development Kit Download For Mac

A very nice alternative to the “classic” terminal is iTerm, now in version 2:

“iTerm2 is a replacement for Terminal and the successor to iTerm. It works on Macs with OS 10.5 (Leopard) or newer. iTerm2 brings the terminal into the modern age with features you never knew you always wanted“

Look under Preferences > Keys for shortcuts to easily navigate/move the tabs…

Generate ssh keys

Open a terminal window and execute the following command:

Man pages:

ssh-keygen generates, manages and converts authentication keys for ssh(1).ssh-keygen can create RSA keys for use by SSH protocol version 1 and DSA, ECDSA, ED25519 or RSA keys for use by SSH protocol version 2.The type of key to be generated is specified with the -t option.If invoked without any arguments, ssh-keygen will generate an RSA key for use in SSH protocol 2 connec-tions.

You will be asked then where to store the key (default under /Users/YOUR_USERNAME/.ssh/id_rsa)

When asked for a passphrase you can enter a passphrase to add it to the key. If you choose to add a passphrase every time you want to use your key with ssh, you’ll have to enter this passphrase. It is a little bit more inconvenient, but more secure.

Once that is done, you should get a message like the following:

You can now use the generated id_rsa.pub key and upload it to the systems you want to connect to over ssh.

Jdk For Mac Os X

Install Programs from Unidentified Developers {.title}

By default, Mac OS only allows users to install applications from ‘verified sources.’ To change that open the System Preferences > Security & Privacy > General and select “Allow applications downloaded from: Anywhere“. Follow this link, to see a more detailed description with pictures.

Often used UNIX keys on the German/Swiss keyboard

I bought the Mac Book to use it as developer machine on the go and one of my initial surprises was the missing of some keys a developer/terminal user uses pretty often like []|{}~

Find below a map for these keys:

So here it is, my personal keyboard map reminder for the Mac OS X:

How to test everything is working

A smoke test to verify if everything installed is functioning properly “together” is to generate an application with JHipster and push it to a git repository.

JHipster is a Yeoman generator, used to create a Spring Boot + AngularJS project.

For any suggestions please leave a comment. Thank you.

References

Adrian Matei