What Happens To Java After You Download It On Mac

Mac users must update to the Java 7 Update 13 for Mac OS X. If you are not sure you need Java, try running your PC for a few weeks to see if you can do without it.

Java for OS X 2013-001 delivers improved security, reliability, and compatibility by updating Java SE 6 to 1.6.041. On systems that have not already installed Java for OS X 2012-006, this update. Java is an object oriented language which gives a clear structure to programs and allows code to be reused, lowering development costs; As Java is close to C and C#, it makes it easy for programmers to switch to Java or vice versa.

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The previous Oracle Java SE license model had several options – some free under the Binary Code License (“BCL”) and some paid under Oracle commercial terms. To simplify and provide full licensing transparency and clarity, Oracle as of Java 9 provides two distinct Java releases:

  • Oracle OpenJDK releases under the open source GNU General Public License v2, with the Classpath Exception (GPLv2+CPE) (since Java 9), and
  • Oracle Java SE product releases, which includes the Oracle JDK for Java 8 and later, and Oracle JRE with Java Web Start in Java 8, under the OTN License Agreement for Java SE. This license permits personal use, development, testing, prototyping, demonstrating and some other uses at no cost.

Different builds are provided for each Java release, but these builds are functionally identical aside from some cosmetic and packaging differences. More details are provided in our Roadmap document and summarized in this blog.

If you are an organization used to getting Oracle Java SE binaries at no cost, you can simply continue doing so with Oracle's OpenJDK releases available at jdk.java.net. If you are used to getting Oracle Java SE binaries at no cost as a personal user or for development use, then you can continue to get Oracle Java SE releases through java.com (personal users) and the Oracle Technology Network (“OTN”) (developers). Those wishing to use the Oracle JDK or Oracle JRE for other uses will require a Java SE Subscription. Supported customers of Oracle products can continue to get their Oracle Java SE binaries from My Oracle Support (MOS) or Oracle Software Delivery Cloud (customers), and other locations.

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.

What Happens To Java After You Download It On Mac
There can be multiple JDKs installed on the macOS system.

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.
After the software is installed, you can delete the .dmg file if you want to save disk space.
What happens to java after you download it on mac catalina

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?

What Happens To Java After You Download It On Mac Download

What happens to java after you download it on mac os

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:

What Happens To Java After You Download It On Mac Os

$ 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:

What Happens To Java After You Download It On Macbook Pro

  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'

What Happens To Java After You Download It On Mac Catalina

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.