Contents
System Requirements
Java SE Runtime Environment Installation
Instructions
Installation
of Self-Extracting Binary
Installation of RPM File
Java Plugin Browser Registration
Instructions
Java Web Start Installation Notes
System Requirements
See supported System
Configurations
for information about supported platforms, operating systems, desktop
managers, and browsers.
For issues, see the Troubleshooting
section of the JDK installation notes.
Installation Instructions
Installing the Java SE Runtime Environment automatically installs the
Java Plugin and Java Web Start. Note that the Java Plugin needs to be
registered with the browser. After installing the JRE, refer to:
Install formats - The JRE
is available in two installation formats.
- Self-extracting Binary File - This file can be used
to install the Java SE Runtime Environment in a location chosen by the
user. This one can be installed by anyone (not only root users), and it
can easily be installed in any location. As long as you are not root
user, it cannot displace the system version of the Java platform
supplied by Linux. To use this file, see Installation
of Self-Extracting Binary below.
- RPM Packages - A rpm.bin file containing
RPM packages, installed with the rpm utility. Requires root
access to install.
RPM packages are the recommended method of installing JRE on Linux. To
use this bundle, see Installation of RPM File
below.
Choose the install format that is most suitable to your needs.
Note: For any text on this page
containing the following notation, you must substitute the appropriate
Java SE Runtime Environment update version number for the notation.
<version>
For example, if you are downloading update 1.6.0_01, the following
command:
./jre-6<version>-linux-i586.bin
would become:
./jre-6u1-linux-i586.bin
Use these instructions if you want to use the self-extracting binary
file to install the Java SE Runtime Environment. If you want to install
RPM packages instead, see Installation of RPM
File.
1. Download
and check the download file size to ensure that you have
downloaded the full, uncorrupted software bundle.
You can download to any directory you choose; it
does not have to be the directory where you want to install the Java SE
Runtime Environment.
Before you download the file, notice its byte size provided
on the download page on the web site. Once the download has completed,
compare that file size to the size of the downloaded file to make sure
they are equal.
2. Make sure
that execute permissions are set on the self-extracting
binary.
Run this command:
chmod +x 6<version>-linux-i586.bin
3. Change
directory to the location where you would like the files to be
installed.
The next step installs the Java SE Runtime
Environment into the current directory.
4.
Run the self-extracting binary.
Execute the downloaded file, prepended by the path
to it. For example, if the file is in the current directory, prepend it
with "./" (necessary if "." is not in the PATH
environment variable):
./jre-6<version>-linux-i586.bin
The binary code license is displayed, and you are prompted
to agree to its terms.
The Java SE Runtime Environment files are installed in a
directory called jre1.6.0_<version> in the current
directory. Follow this link to see its directory
structure.
Note about Root Access:
Unbundling the software automatically creates a directory called jre1.6.0_<version>.
Note that if you choose to install the Java SE Runtime Environment into
system-wide location such as /usr/local, you must first
become root to gain the necessary permissions. If you do not have root
access, simply install the Java SE Runtime Environment into your home
directory, or a subdirectory that you have permission to write to.
Note about Overwriting Files: If you unpack the
software in a directory that contains a subdirectory named jre1.6.0_<version>,
the new software overwrites files of the same name in that jre1.6.0_<version>
directory. Please be careful to rename the old directory if it contains
files you would like to keep.
Note about System Preferences: By default, the
installation script configures the system such that the backing store
for system preferences is created inside the Java SE Runtime
Environment's installation directory. If the JRE is installed on a
network-mounted drive, it and the system preferences can be exported
for sharing with Java runtime environments on other machines.
See the Preferences
API documentation for more information about preferences in the
Java platform.
Installation of RPM File
Use these instructions if you want to install Java SE Runtime
Environment in the form of RPM packages. If you want to use the
self-extracting binary file instead, see Installation
of Self-Extracting Binary.
1.
Download and check the file size.
You can download to any directory you choose.
Before you download the file, notice its byte size provided
on the download page on the web site. Once the download has completed,
compare that file size to the size of the downloaded file to make sure
they are equal.
2.
Become root by running the su command
and entering the super-user password.
3.
Extract and install the contents of the
downloaded file.
Change directory to where the downloaded file is
located and run these commands to first set the executable permissions
and then run the binary to extract and run the RPM file:
chmod a+x jre-6<version>-linux-i586-rpm.bin
./jre-6<version>-linux-i586-rpm.bin
Note that the initial "./" is required if you do
not have "." in your PATH environment variable.
The script displays a binary license agreement, which you
are asked to agree to before installation can proceed. Once you have
agreed to the license, the install script creates and runs the file jre-6<version>-linux-i586.rpm
in the current directory.
NOTE - If instead you want to only extract the RPM
file but not install it, you can run the .bin file with the -x
argument. You do not need to be root to do this.
4. Delete
the bin and rpm file if you want to save
disk space.
5.
Exit the root shell.
Java Plugin Browser Registration
Instructions
See Java Plugin
Browser Registration Instructions in the JDK Installation Notes for
Linux.
Java Web Start Installation Notes
This Java SE Runtime Environment release includes Java Web
Start; it is installed automatically with the Java SE Runtime
Environment. But note the following:
- Compatibility: The release of Java Web Start
that comes with this JDK/JRE can be run on SDK/JRE 1.2.2 or later. It
will not work with SDK/JRE 1.1.x or earlier.
- Upgrading from Previous Versions: If you have a
previous release of Java Web Start, do not uninstall it. Uninstalling
it will cause the download cache to be cleared, and all previously
installed Java Web Start applications will have to be downloaded again.
This new release will overwrite previous installations and
automatically update browsers to use this new release. The
configuration files and program files folder used by Java Web Start
have not changed, so all your settings will remain intact after the
upgrade.
- Using Java Web Start with Netscape 6.x/7.x: For
Netscape 6.x/7.x users, setup the Java Web Start MIME type (JNLP) in
the Edit->Preferences->Navigator->Helper Applications section.
The file extension is
jnlp; MIME Type is application/x-java-jnlp-file.
It should be handled by the javaws executable file in
your Java Web Start directory. Also note that, due to a problem with
the JavaScript in Netscape 6.x/7.x, you must use the non-JavaScript
version of the demos page
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