This topic includes the following sections:

System Requirements for Installing the JDK on macOS

There is java support software (tools) included (pre-installed), but there is no java runtime (to actually use java apps, etc) until you need it, or choose to install it yourself. If you believe that you want to completely remove Java from your Mac - uninstall steps here. How to download Mojave and install it safety. Apple's new Mac software, macOS Mojave, is available now. However, as the operating system is still so new, there may be some macOS 10.14 Mojave problems that are still present. If you're worried, it may be worth waiting a few weeks so that all the issues are fixed.

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 13 Interim 0, Update 0, and Patch 0, then you see a string that includes the text 13. 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 13 --exec javac -version

Installing the JDK on macOS

1. Download the JDK .dmg file, jdk-13.interim.update.patch_osx-x64_bin.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 13.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

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-13.interim.update.patch.jdk

   For example, to uninstall 13 Interim 0 Update 0 Patch 0:

   $ rm -rf jdk-13.jdk

Installation FAQ on macOS Platform

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

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 13?

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 13`

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. 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.

Question or issue on macOS:

Im a new Java developer and was thinking about getting a Mac. But I heard that OSX Lion does not support Java. Does that mean that I cannot develop Java on a Mac? Or that I just have to go get all the Java downloads myself?

How to solve this problem?

Solution no. 1:

What it means for right now, is nothing has changed, except that the JDK 6 and on is now a separate download via Software Update. For JDK 7 it will be available from Oracle, maybe even through the App Store if we are lucky!

What has happened is Apple has quit mangling their own JDK into the OS and delegating responsibility to Oracle to supply a JDK for OSX going forward. It isn’t installed by default, but after the fact just like on every other platform other than Solaris. Arguably this will be a good thing, as the Apple JDK usually lags 6 months plus behind the official Sun/Oracle one. Having someone with a more vested interest in the technology on all the platforms is a good thing!

Original Press Release Ps1 games eboots.

As of the release of Java for Mac OS X 10.6 Update 3, the version of
Java that is ported by Apple, and that ships with Mac OS X, is
deprecated. This means that the Apple-produced runtime will not be
maintained at the same level, and may be removed from future versions
of Mac OS X. The Java runtime shipping in Mac OS X 10.6 Snow Leopard,
and Mac OS X 10.5 Leopard, will continue to be supported and
maintained through the standard support cycles of those products.

And the most recent relevant press release is ( I put the important points in BOLD )

REDWOOD SHORES and CUPERTINO, California—November 12, 2010—Oracle and
Apple® today announced the OpenJDK project for Mac OS® X. Apple will
contribute most of the key components, tools and technology required
for a Java SE 7 implementation on Mac OS X, including a 32-bit and
64-bit HotSpot-based Java virtual machine, class libraries, a
networking stack and the foundation for a new graphical client.
OpenJDK will make Apple’s Java technology available to open source
developers so they can access and contribute to the effort.
“We are excited to welcome Apple as a significant contributor in the
growing OpenJDK community,” said Hasan Rizvi, Oracle’s senior vice
president of Development. “The availability of Java on Mac OS X plays
a key role in the cross-platform promise of the Java platform. The
Java developer community can rest assured that the leading edge Java
environment will continue to be available on Mac OS X in the future.
Combined with last month’s announcement of IBM joining the OpenJDK,
the project now has the backing of three of the biggest names in
software.”
“We’re delighted to be working with Oracle to insure that there
continues to be a great version of Java on the Mac,” said Bertrand
Serlet, Apple’s senior vice president of Software Engineering. “The
best way for our users to always have the most up to date and secure
version of Java will be to get it directly from Oracle.”
Apple also confirmed that Java SE 6 will continue to be available from
Apple for Mac OS X Snow Leopard® and the upcoming release of Mac OS X
Lion. Java SE 7 and future versions of Java for Mac OS X will be
available from Oracle.

Java Download For Mac Mojave Dmg

My personal opinion is OSX is the premiere platform for Java development, and as long as Oracle doesn’t drop the ball will just become even better.

Solution no. 2:

I’ve just experienced this confusion/issue and I noticed that no-one in this question really gave the steps to get Java on Lion if you don’t have any JARs or apps: If you want to prompt OS X to install the JVM, run the “Java Preferences” app in Applications > Utilities.

Download Java Jdk For Mac Mojave

This will display a confirmation for “Install Java runtime” which will then cause Software Update to do its magic

Solution no. 3:

All the ‘lack of Java support’ means is that Lion doesn’t install a JVM. But when you need it, the JVM gets installed.

I’ve just installed Lion and at the first reboot was prompted to install the JVM.

Solution no. 4:

The latter. Java is not included anymore by default in Mac Os X 10.7 Lion.

You can still install it using the Software update program. It also downloads Java automatically in a variety of scenario’s (though I don’t know which)

Solution no. 5:

Java 6 is not installed by default in Lion, but was download by the Software Update after I tried to launch my muCommander.

What is incredibly good, is that all Swing and SWT apps look very well in Lion (including NetBeans and Eclipse), already using the new look and feel Lion has (more squared buttons, simpler scrollbars, etc).

Hope this helps!