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Important Oracle Java License Update The Oracle Java License has changed for releases starting April 16, 2019. The new Oracle Technology Network License Agreement for Oracle Java SE is substantially different from prior Oracle Java licenses. The new license permits certain uses, such as personal use and development use, at no cost - but other uses authorized under prior Oracle Java. What's new in Jarfix 3.0.0: From Java 11, Oracle does not provide a dedicated JRE anymore, only a JDK, therefore for x64 and JDK 9+, jarfix 3 will search for a JDK first and then for a JRE. Download Java Jdk 8 Mac Os 10.13 Download Java Jdk 8 Macos 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. Download Java Jdk 8 Mac Os 10.13 Download Java Jdk 8 Macos 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.

This topic includes the following sections:

System Requirements for Installing the JDK on macOS

The following are the system requirements for installing the JDK on macOS:

• Any Intel-based computer running macOS.

• Administrator privileges.

  You cannot install Java for a single user. Installing the JDK on macOS is performed on a systemwide basis for all users. Administrator privileges are required to install the JDK on macOS.

Determining the Default JDK Version on macOS

When starting a Java application through the command line, the system uses the default JDK.

You can determine which version of the JDK is the default by entering java -version in a Terminal window. If the installed version is 11 Interim 0, Update 0, and Patch 0, then you see a string that includes the text 11. For example:

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

$ /usr/libexec/java_home -v 11 --exec javac -version

Installing the JDK on macOS

1. Download the JDK .dmg file, jdk-11.interim.update.patch-macosx-x64.dmg.

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

2. From either the browser Downloads window or from the file browser, double-click the .dmg file to start it.
   A Finder window appears that contains an icon of an open box and the name of the .pkg file.
3. Double-click the JDK 11.pkg icon to start the installation application.
   The installation application displays the Introduction window.
4. Click Continue.
5. Click Install.
   A window appears that displays the message: Installer is trying to install new software. Enter your password to allow this.
6. Enter the Administrator user name and password and click Install Software.
   The software is installed and a confirmation window is displayed.

Uninstalling the JDK on macOS

You must have Administrator privileges.

Note:

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 that you perform an update of the OS.

1. Go to /Library/Java/JavaVirtualMachines.
2. Remove the directory whose name matches the following format by executing the rm command as a root user or by using the sudo tool:
   /Library/Java/JavaVirtualMachines/jdk-interim.update.patch.jdk

   For example, to uninstall 11 Interim 0 Update 0 Patch 0:

   $ rm -rf jdk-11.jdk

Installation FAQ on macOS Platform

This topic provides answers for the following frequently asked questions about installing JDK on macOS computers.

1. How do I find out which version of Java is the system default?

When you run a Java application from the command line, it uses the default JDK. If you do not develop Java applications, then you do not need to worry about this. See Determining the Default JDK Version on macOS.

2. How do I uninstall Java?

See Uninstalling the JDK on macOS.

3. After installing Java for macOS 2012-006, can I continue to use Apple's Java 6 alongside the macOS JDK for Java 11?

If you want to continue to develop with Java 6 using command-line, then you can modify the startup script for your favorite command environment. For bash, use this:

$ export JAVA_HOME=`/usr/libexec/java_home -v 11`

Some applications use /usr/bin/java to call Java. After installing Java for macOS 2012-006, /usr/bin/java will find the newest JDK installed, and will use that for all of the Java-related command-line tools in /usr/bin. You may need to modify those applications to find Java 6, or contact the developer for a newer version of the application.

4. Can I restore Apple Java after uninstalling Oracle Java?

Go back to Apple Java using the following instructions:

1. Uninstall Oracle Java by deleting the plug-in file. From a command-line, enter:

   $ sudo rm -rf '/Library/Internet Plug-Ins/JavaAppletPlugin.plugin'

2. Create a symlink using the following command, entered on a single line:

   $ sudo ln -s /System/Library/Java/Support/CoreDeploy.bundle/Contents/JavaAppletPlugin.plugin '/Library/Internet Plug-Ins/JavaAppletPlugin.plugin'

5. What happened to the Java Preferences app in Application Utilities?

The Java Preferences app was part of the Apple Java installation and is not used by Oracle Java. Therefore, macOS releases from Apple that do not include Apple Java will not include Java Preferences.

Make JAR files accessible as they were intended by fixing file association problems caused by other programs with this highly-efficient repair utility

What's new in Jarfix 3.0.0:

• From Java 11, Oracle does not provide a dedicated JRE anymore, only a JDK,
• therefore for x64 and JDK 9+, jarfix 3 will search for a JDK first and then for a JRE, otherwise the latest
• Java Runtime Environment could not be found if both JDK 11+ and a JRE version < 11 are being installed
• For Oracle JDK < 9 or on 32-bit platforms, the mature search strategy remains unchained

Read the full changelog

Setup installers for Windows applications are usually wrapped in an EXE file. However, some applications are dedicated to modifying other types, and file formats are abundant, even for a single type of file. The one in question here is JAR, which can easily get associated with another type of program, thus making it impossible for users to launch JAR applications by just double-clicking these files. Luckily, Jarfix comes to save the day.

Restore the JAR filetype association with Java

JAR files are nothing more than special executable files created by Java, which come bundled with a variety of classes and functions to make the dedicated program work. Also, Java Runtime Environment must be installed on the computer in order to run Java apps.

The problem is that some archiving utilities assume that you use JAR files to compress files into archives and, after installing these archiving utilities, they get automatically associated with JAR files, thus overwriting Java.

Fix errors made from incorrect filetype associations

In such cases, it becomes difficult for users to open JAR files with Java, unless they know how to fiddle with the Windows settings to manually change the filetype association. Users might even think that the JAR program in question is not functional just because it seemingly cannot be opened with Java.

As mentioned above, you can rely on Jarfix to solve this issue. A neat advantage that can be noticed right from the start is that you don’t have to go through any kind of trouble with an installer because this application can be run right after download. As such, you can also carry it around on an USB flash drive to restore the JAR filetype association on other computers that deal with this issue.

Double-click the downloaded file to perform the fixup

The task is finished instantly and you don’t even need to restart your computer for JAR files to revert to their default form. However, you must have administrative permissions. A small prompt appears to inform you that the operation is successful, also pointing out the location of the Java Runtime Environment program on your computer.

As suggested in the prompt, things might not work as intended the first time, but this only depends on the application that’s taking control of the JAR file. In case the problem persists, you can run Jarfix again.

Other solutions also exist but are not quite recommended for inexperienced individuals. A simple alternative is to completely remove Java Runtime Environment and reinstall it to overwrite the faulty filetype association made by the archiving tool or other software.

Simple fixer upper for JAR filetype associations

All in all, Jarfix is a nifty little repair tool that gets the job done quickly and flawlessly in most cases. It performed well under several situations and we managed to restore functionality for malfunctioning JAR files. It’s portable, doesn’t require any kind of accommodation, and can save a considerable amount of time if you really need to use a JAR program.

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Jarfix was reviewed by Mircea Dragomir

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