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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:
Determining the Default JDK Version on macOS
When starting a Java application through the command line, the system uses the default JDK.
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 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
After the software is installed, you can delete the
.dmg file if you want to save disk space.
Uninstalling the JDK on macOSYou 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.
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 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 You may need to modify those applications to find Java 6, or contact the developer for a newer version of the application.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.
JDK 9 & Later
Oracle's OpenJDK JDK binaries for Windows, macOS, and Linux areavailable on release-specific pages of jdk.java.net as
.tar.gz or.zip archives.
As an example, the archives for JDK 13 may be found on jdk.java.net/13 and may be extractedon the command line using
$ tar xvfopenjdk-13*_bin.tar.gz Java Version 6
or
$ unzipopenjdk-13*_bin.zip
depending on the archive type.
JDK 8Debian, Ubuntu,etc.
On the command line, type:
$ sudo apt-get installopenjdk-8-jre
The
openjdk-8-jre package containsjust the Java Runtime Environment. If you want to develop Javaprograms then please install the openjdk-8-jdk package.
Fedora, OracleLinux, Red Hat Enterprise Linux, etc.
On the command line, type:
$ su -c 'yum installjava-1.8.0-openjdk' Java Se 6 Runtime Mac
The
java-1.8.0-openjdk packagecontains just the Java Runtime Environment. If you want to developJava programs then install the java-1.8.0-openjdk-devel package.
JDK 7Debian, Ubuntu,etc.
On the command line, type:
$ sudo apt-get installopenjdk-7-jre
The
openjdk-7-jre package containsjust the Java Runtime Environment. If you want to develop Javaprograms then install the openjdk-7-jdk package.
Fedora, OracleLinux, Red Hat Enterprise Linux, etc.
On the command line, type:
$ su -c 'yum installjava-1.7.0-openjdk'
The
java-1.7.0-openjdk packagecontains just the Java Runtime Environment. If you want to developJava programs then install the java-1.7.0-openjdk-devel package.
JDK 6Debian, Ubuntu,etc.
On the command line, type:
$ sudo apt-get installopenjdk-6-jre
The
openjdk-6-jre package containsjust the Java Runtime Environment. If you want to develop Javaprograms then install the openjdk-6-jdk package.
Fedora, OracleLinux, Red Hat Enterprise Linux, etc.
On the command line, type:
Java 6 For Mac Download$ su -c 'yum installjava-1.6.0-openjdk' Java Version 6 Download Mac Version
The
java-1.6.0-openjdk packagecontains just the Java Runtime Environment. If you want to developJava programs then install the java-1.6.0-openjdk-devel package.
Java 6 For MacBSD PortDownload Java 8 For Mac
For a list of pointers to packages of the BSD Port forDragonFly BSD, FreeBSD, Mac OS X, NetBSD and OpenBSD, please seethe BSD porting Project's wikipage.
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