JRE Installation for Microsoft Windows (32-bit)

System Requirements

See supported System Configurations for information about supported platforms, operating systems, desktop managers, and browsers.

Running with less memory may cause disk swapping which has a severe effect on performance. Very large programs may require more RAM for adequate performance.

Installation Instructions

1.If choosing "Windows Offline Installation", download and check the download file size After clicking the JRE "Download" link for the "Windows Offline Installation" a dialog box pops up -- choose the following option:

• Save - This saves the downloaded file without installing it. Check that you have downloaded the entire file by comparing the size of the file you downloaded with the expected size shown on the download page:


• jre-1_6_0_-windows-i586.exe This file contains everything needed to install the Java SE Runtime Environment, including the installer and character conversion classes and support for locales other than the US English locale.

2.Run the installer

You must have administrative permissions in order to install the Java SE Runtime Environment on Microsoft Windows 2000 and XP.

The download page provides the following two choices of installation. Continue based on your choice.

a.Windows Online Installation - After clicking the "Download" link for the JRE, a dialog box pops up -- choose the following option:

• Open - This starts a small program which then prompts you for more information about what you want to install.

This option starts the installation process by downloading and executing the file jre-1_6_0_-windows-i586-iftw.exe, which prompts you through the steps to download and install only the features you request. (The letters " iftw " mean "install from the web".)

b. Windows Offline Installation - Run the file downloaded in step 1 by double-clicking on the installer's icon. Then follow the instructions the installer provides. When done with the installation, you can delete the downloaded file to recover disk space.

With either choice, the installer may ask you to reboot your computer

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.

The installation process also installs Java Web Start.

You may see a misleading message if you do the following:

1. Download and cache a Java Web Start (JNLP) application with JDK/JRE 5.x


2. Remove JDK/JRE 5.x using "Add or Remove Programs" from the Windows Control Panel


3. Remove the Java Web Start application using "Add or Remove Programs."

When you remove the application, you see an "Uninstaller Error" dialog saying "An error occurred while trying to remove Java-Application: App. It may have already been uninstalled. Would you like to remove Java-Application: App from the Add or Remove program list?" If you say yes to this, then you will see another "Uninstaller Error" dialog saying "You do not have sufficient access to remove Java-Application: App from the Add or Remove Program list. Please contact your system administrator." This is the misleading message. It implies that the problem is due to privileges. It is not. The problem is that you have already removed the Java Web Start application when you removed JDK/JRE 5.x, but this is not reflected in the "Add or Remove Programs" dialog until it is refreshed by pressing F5 or it is closed and reopened.

To avoid seeing this misleading message, either press F5 or close and reopen the dialog. Any Java Web Start application that was downloaded and cached with JDK/JRE 5.x will no longer appear in the list of currently installed programs.

• 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