Java SE 6 Release Notes
Microsoft Windows Installation (32-bit)
See supported System Configurations for information about supported platforms, operating systems, desktop managers, and browsers.
minimum physical RAM is required to run graphically based
applications. More RAM is recommended for applets running
within a browser using the Java Plugin. Running with less
memory may cause disk swapping which has a severe effect on
performance. Very large programs may require more RAM for
This installation requires Windows Installer 2.0 to be on your machine. For more details, see the Troubleshooting the Installation section .
For the amount of disk space required, see Windows Disk Space Requirements.
Note - The JDK has two
version numbers -- external version number (6) and an internal
version number (1.6.0).
Note - Trying to install
the JDK on a non-supported version of Microsoft Windows or
on a machine that doesn't have a sufficiently up-to-date
Service Pack will cause the installer to generate this warning:
"We recommend that you do not install this Java platform for the
following reasons: This Java platform does not support the
operating system or operating-system service pack on this
machine." See the system requirements above for information on supported configurations of Microsoft Windows.
this procedure, you will run the self-installing executable to unpack
and install the JDK software bundle. As part of the JDK, this
installation includes an option to include the public Java Runtime Environment. (The JDK also contains a private JRE for use only by its tools.)
For issues related to Windows Online Installation and Java Update, see the Windows Online Installation and Java Update FAQ. See this note on Proxy Settings and Authentication.
Troubleshooting - If you have any difficulties, see the Troubleshooting section at the end of this document or submit a bug report for your installation problem.
Note - For any text on
this page containing the following notation, you must
substitute the appropriate update version number for the notation.
For example, if you were downloading the installer for update 1.6.0_01, the following file name:
1. Check the download file size (Optional)
you save the self-installing executable to disk without
running it from the download page at the web site, notice that its byte
size is provided on the download page. Once the download has
completed, check that you have downloaded the full, uncorrupted
2. Run the JDK installer
You must have administrative permissions in order to install the JDK on Microsoft Windows.
The file jdk-6u1<version>-windows-i586-i.exe
is the JDK installer. If you downloaded it instead of
running it directly from the web site, double-click on the
installer's icon. Then follow the instructions the installer
provides. The installer may ask you to reboot your computer.
When done with the installation, you can delete
the download file to recover disk space.
Installed Directory Tree
The JDK has the directory structure shown below.
The JDK has the option of installing public JRE and JavaDB. For more information on JRE installation see the JRE Installation page.
JDK Silent Installation
can perform a silent JDK installation by using the command-line
arguments. The following arguments install JDK silently and provide an
option of installing public JRE and JavaDB.
- JDK installs public jre and javadb in the silent mode.
Use the command
- JDK does not install public jre, but installs javadb in the silent mode.
Use the command
jdk.exe /s ADDLOCAL="ToolsFeature,DemosFeature,SourceFeature,JavaDBFeature"
- JDK does not install javadb, but installs public jre in the silent mode.
Use the command
jdk.exe /s ADDLOCAL="ToolsFeature,DemosFeature,SourceFeature,PublicjreFeature"
- JDK does not install either javadb or public jre in the silent mode.
Use the command
jdk.exe /s ADDLOCAL="ToolsFeature,DemosFeature,SourceFeature"
- Install public jre and javadb to the specified directories.
Use the command
jdk.exe /s /INSTALLDIRPUBJRE=c:\test\ /INSTALLDIRJAVADB=c:\testdb\
Note - Some of the arguments work only with 6u15 and higher releases.
3. If you want to run Netscape 7.x, Mozilla 1.x, or Firefox 1.x with Java Plugin, do this:
- Exit the Netscape 7.x, Mozilla 1.x, or Firefox 1.x browser and all of its "objects" (Messenger, Composer ...);
- If the Quick Launch feature is enabled, disable it;
- Then restart Netscape 7.x, Mozilla 1.x, or Firefox 1.x.
4. Update the PATH variable (Optional)
You can run the JDK without setting the PATH variable, or you can optionally set it as a convenience. Should I set the PATH variable?
Set the PATH variable if you want to be able to conveniently run the JDK executables (
etc.) from any directory without having to type the full
path of the command. If you don't set the PATH variable, you
need to specify the full path to the executable every time
you run it, such as:
C:> "\Program Files\Java\jdk1.6.0_<version>\bin\javac" MyClass.java
It's useful to set the PATH permanently so it will persist after rebooting. How do I set the PATH permanently?
To set the PATH permanently, add the full path of the jdk1.6.0_<version>\bin directory to the PATH variable. Typically this full path looks something like C:\Program Files\Java\jdk1.6.0_<version>\bin. Set the PATH as follows on Microsoft Windows:
- Click Start > Control Panel > System on Windows XP or Start > Settings > Control Panel > System on Windows 2000.
- Click Advanced > Environment Variables.
- Add the location of bin folder of JDK installation for PATH in
User Variables and System Variables. A typical value for PATH is:
- PATH environment variable is a series of directories
separated by semi-colons (;) and is not case sensitive.
Microsoft Windows looks for programs in the PATH directories
in order, from left to right.
- You should only have one bin directory for a JDK in the path
at a time. Those following the first instance are
ignored. If one is already present, update it to
- If you are not sure where to add the path, add it to the right end of the PATH in the User Variables.
- The new path takes effect in each new command window you open after setting the PATH variable.
5. Start using the JDK!
computer system should now be ready to use the JDK. In this
step, you'll run some simple commands to make sure it is working
properly. If you are new to developing and running
programs in the Java programming language, see The Java Tutorial online for some guidance. Note especially the tutorial trails under the heading Trails Covering the Basics.
You can also download the JDK documentation from the JDK download page.
Uninstalling the JDK
you should ever want to uninstall the JDK, use the "Add/Remove
Programs" utility in the Microsoft Windows Control Panel.
If you use the Invocation API
to launch an application directly rather than using the Java
application launcher, be sure to use the correct paths to invoke
the Java HotSpot Client Virtual Machine (VM) or Java HotSpot
Server VM, as desired. The path within the JDK to the Java
HotSpot Client VM is:
jre/bin/client/jvm.dll (on x86)
The path to the Java HotSpot Server VM is:
jre/bin/server/jvm.dll (on x86)
jre/bin/server/jvm.dll (on IA64)
corresponding locations in the Java SE Runtime Environment begin with
jre1.6.0 instead of jre. The Exact VM and Classic VM are no
longer part of the JDK, and existing code that uses the
Invocation API to launch an application based on old paths to the
Exact or Classic VMs will not work.
Troubleshooting the Installation
are some tips for working around problems that are sometimes seen
during or following an installation. For more troubleshooting
information, see the Java FAQ.
- If you see the error message "config.nt. The system file is not suitable for running MS-DOS and Microsoft Windows Applications. "
when you try to launch the installer on Microsoft Windows 2000 then
there is a problem with the %SystemRoot%\System32\COMMAND.COM file
To resolve the error see the article at http://support.microsoft.com/support/kb/articles/Q142/2/71.asp.
- If you see the error message "corrupt cabinet file" then
the file you have downloaded is corrupted. Check the file
size against the expected file size listed in these instructions. If
they don't match, try downloading the bundle again. A
cabinet file contains compressed application, data,
resource and DLL files.
- If you see the error message "System Error during Decompression" then you might not have enough space on the disk that contains your TEMP directory.
- If you see the error message " This program cannot be run in DOS mode." then do the following:
- Open the MS-DOS shell or Command Prompt window
- Right-click on the title bar
- Select Properties
- Choose the Program tab
- Push the Advanced button
- Make sure the item "Prevent MS-DOS-based programs from detecting Windows" is unchecked
- Select OK
- Select OK again
- Exit the MS-DOS shell
- Restart your computer.
- Private vs. public JRE - Installing the JDK installs a private Java SE Runtime Environment (JRE) and optionally a public copy. The private JRE
is required to run the tools included with the JDK. It has no
registry settings and is contained entirely in a jre directory
C:\Program Files\jdk1.6.0\jre) whose location is known only to the JDK. On the other hand, the public JRE can be used by other Java applications, is contained outside the JDK (typically at
is registered with the Windows registry (at
HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft), can be removed using
Add/Remove Programs, might or might not be registered with
browsers, and might or might not have java.exe copied to the Windows
system directory (making it the default system Java platform or
- Creating source files in Notepad - In Microsoft Windows,
you create a new file in Microsoft Notepad and
then save it for the
first time, Notepad normally
.txt extension to
filename. Therefore, a file you name
Test.java is saved as
It's important to note that you cannot
extension unless you turn on the viewing of
extensions (in Microsoft Windows Explorer, uncheck "Hide file extensions
for known file types" under Folder Options). To
extension, enclose the
filename in quotation marks, such as
when typing it into the Save As dialog box.
On the other hand, Microsoft WordPad does not add a file extension
if you provide one -- you must save the file as "Text
- Choosing an installation path containing characters that are not
part of the system code page
- On Windows 2000, XP, and 2003, it
is possible to name directories using characters that are not part
the system locale's code page.
If such a directory is part of the installation
path, then generic error 1722 occurs, and installation
is not completed. Error 1722 is an Install Shield error code. It
indicates that the installation process has failed. The exact reason
for this error is not known at this time. To prevent
this problem, make sure that the user and system locales
are identical, and that the installation path
only contains characters
are part of the system locale's code page. User and system locales
can be set in the Regional Options
or Regional Settings control panel.