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What is a JDK?
The Java SE Development Kit, or JDK, is an extended subset of tools that allow for developing applications for the Java programming language.
How to download / install java JDK on your macJava for OS X 2014-001 Java SE Development Kit 8 Downloads http://www.oracle. JDK for Mac ReadMe. This release of the JDK is a developer-only version. You can use it to create Java applications and includes the new JavaFX 2.2 client stack.
The installation process is very straight forward:
Navigate to the Java SE Downloads page
- Choose the JDK Download:
- Agree to terms and download the Mac OS X version
- Open the dmg file and run the installation accepting all defaults
Known installation issues
There are currently no reported issues. If you are having one, please report it in the Treehouse forum.
This page tells you how to download and install Java 8 and Eclipse on Mac OS X, and how to configure Eclipse.
Installing Java 8
Go to the Oracle website. You'll see something like this:
Scroll down until you see a heading beginning 'Java SE 8u65/8u66.' On the right, you'll see a Download button under the JDK header. Click it. The next screen will look like this:
Click the radio button next to 'Accept License Agreement' and then click on jdk-8u65-macosx-x64.dmg. You'll be asked whether to save the file that is going to be downloaded; click on Save File.
Open your Downloads folder, and double-click on jdk-8u65-macosx-x64.dmg. You'll see this window:
Double-click on the package icon, and follow the instructions to install. When the installation has completed, click on Done. At this point, you may close up the window and drag jdk-8u65-macosx-x64.dmg to the Trash.
Installing Eclipse
If you already have Eclipse installed on your Mac, you need to get rid of it. To do so, first quit Eclipse if you're currently running it. Then, go to your workspace folder (probably in Documents/workspace) and save anything there that you want to keep, because you're about to get rid of this folder. Next, drag the workspace folder to the Trash.
Go to your Applications folder. One way to get there is, from the Finder, type command-shift-A. You'll a folder named eclipse in there; drag the eclipse folder to the Trash. If you have an Eclipse icon in your dock, remove it from the dock.
Now you're ready to download and install the newest version of Eclipse. Go to this website. You'll see a window like this:
Scroll down until you see 'Eclipse IDE for Java Developers' and click where it says 64 bit under Mac OS X.
You will see this window:
Click on the yellow download button. If asked, click on 'Open with Archive Utility (default)' and then click OK. The download might take a few minutes. You should not feel compelled to donate.
After the download completes, folders should automatically expand. If they don't, double-click on the .tar file. When that's done, you should see a folder named eclipse in your Downloads folder. When you open your Downloads folder, if you see Applications under the Favorites on the left side of the window, you should drag the eclipse folder into Applications. If you don't see Applications, then open a new window for Applications (from the Finder, command-shift-A), and drag the eclipse folder into Applications.
Open your Applications folder, and then open the eclipse folder. You'll see an item named Eclipse; if you like, drag its icon into the dock so that you'll be able to launch Eclipse easily.
Launch Eclipse. If you're asked whether you want to open it, of course you do; click Open. You'll see a window like this:
It will have your user name rather than mine (scot). Select where you want your workspace to be; I recommend the default of your Documents folder. Click the checkbox for using this location as the default, and then click OK.
You'll see a window like this:
Click on the Workbench arrow in the upper right that I've circled. You shouldn't see this screen again, even if you quit Eclipse and relaunch it.
You'll get an empty workbench like this:
We won't be using the 'Task List' and 'Connect Mylyn' windows. Click the 'x' on each to close it. Press the mouse on the Window menu item, then choose 'Perspective', and finally choose 'Save Perspective as..'. Enter 'cs10' for the name of this perspective and press return. Your workbench will now look like this:
You have now installed Eclipse!
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Configuring Eclipse
You don't have to configure Eclipse the way I do, but you'll probably avoid some confusion if you do. Here's how.
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In the Eclipse menu bar, click on the Eclipse menu and then on 'Preferences..'. You'll see a window with two panes. On the left pane is a list of types of things you can configure.
Click on the triangle to the left of General. Then click on the triangle to the left of Appearance. Then click on 'Colors and Fonts.' You should see a window like this:
In the window in the middle, click on the triangle next to Java. Then double-click on 'Java Editor Text Font':
You'll see this window:
On the right, where you can select the size, click 12. Then close this window by clicking on the window's close button.
Close up the General preferences by clicking on the triangle to the left of General. Click the triangle next to Java and then click the triangle next to 'Code Style.' Then click Formatter. Here's what you should see:
Click the button that says 'New..'. You'll see a window such as this one:
You can type in any profile name you like. I used 'CS 10':
Click OK.
You should see a window like this:
Change the tab size to 2:
You'll see that the indentation size automatically changes as well.
Click on 'Blank Lines,' and after 'Between import groups' and 'Before declarations of the same kind,' change the values 1 to 0:
Click on 'Control Statements,' and check the first four boxes as I've done here:
Click OK.
Now click on triangles to close up Java. Click on the triangle next to Run/Debug, and then click on Console:
Click on the green color sample next to 'Standard In text color.' You'll get a color picker:
Slide the slider on the right down, so that you get a dark green. (You're at Dartmouth. What other color could you possibly want?)
Close the color picker window by clicking its close button, and click OK again to close the Preferences window.
And you're done!
Introduction
Java is the most widely used general purpose, secured, robust, object-oriented language which was developed by Sun Microsystems in 1990. Java is portable which means it follows write once run anywhere paradigm. The latest version is java9 which was released on September 21,2017. In this tutorial, we will learn the installation process of Java on MacOS.
Prerequisites
- MacOS
- Login as an administrator in terminal
Installation
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There are the following steps used to install Java on MacOS.
1) Download The latest version
We can visit the official website of oracle by simply pasting the link in the browser's search bar: http://www.oracle.com/technetwork/java/javase/downloads/jdk9-downloads-3848520.html and download the disk image file for MAC Operating System.
2) Mount the dmg file
The downloaded file is in .dmg format that is disk image file. On Mac Operating system, we can't install the dmg files by using installer command.
Installer command is used with the files that are in package format. To get the file in the desired format, we need to mount the file by using following command.
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Hdiutil command is used with the option -mount to get the disk image file mounted. When we run this command, we'll get a mounted file with the same name but in the .pkg format. This file is located inside Volumes directory.
3) Install the Package
Installer command is used to install the package. This can be done as shown below.
This command is used with the target option which represents the location where the package is to be installed. In this case, we are installing the package in the root directory. To run the installer command, we must have the super user privileges. For that purpose, sudo is used which prompts the user to fill the admin password. The command installs brand new Java 9 on our MacOS.
4) Checking java version
To confirm, whether java is installed on the computer or not, we may use the java -version command as shown below.
5) Unmount the Disk Image File
Hdiutil command with unmount option is used to unmount the disk image file. Unmounting frees the volume which was used to store the package when we were installing the package.
Now if we search for the pkg file in the Volumes directory then we are not going to find it.
Extra Info
To use the java complier, we can simply type javac in the terminal. To Execute the java files, we can use java tool by simply typing, java <file-name> .
This is how, we can use java on MacOS installing through terminal.