j2re-1_4_2_06-windows-i586-p.exe /s /v"/qn IEXPLORER=1 ADDLOCAL=ALL UPDATE=1 /L C:\jre.log"
Here is the command for silent installation, turning off automatic updates:
The options are described below.
.exe is the single executable installer for the JRE ADDLOCAL is either jrecore[,extra][,other_US] or ALL IEXPLORER=1 indicates that the JRE should be registered with the Internet Explorer browser NETSCAPE6=1 indicates that the JRE should be registered with Netscape 6 or later browsers MOZILLA=1 indicates that the JRE should be registered with Mozilla 1.1 and later browsers INSTALLDIR specifies the drive and path of the installation REBOOT=Suppress indicates that if locked files are encountered the computer should not be rebooted JAVAUPDATE=1 indicates that Java Update feature is enabled EULA=1 indicates that End User License Agreement will be displayed on first use and not during installation
See all the details for installation options at the Java web site.