use Sun's JRE/JDK 1.6 Parameter to Specify a Particular JRE with Multiple

How to use Sun's JRE/JDK 1.6.0_10 java_version Parameter to Specify a Particular JRE with Multiple Versions on a PC [ID 758823.1]

Applies to:

Oracle Forms - Version: 10.1.2.3.0 to 10.1.2.3.0
Information in this document applies to any platform.

Goal

How to use the Sun JRE parameter "java_version" parameter that is available with JRE 1.6.0_10 and above.

Solution

Sun has created a new parameter for the JRE called java_version that can be used when you have multiple JRE versions on your PC

Version Selection Mechanisms

The new Java Plug-In (1.6.0_10 and above) provides a new platform. and browser-independent mechanism for selecting a JRE version upon which to launch an applet: the java_version applet parameter. This new parameter supports:

Selection of a specific JRE version ("1.5.0_12")
Selection of the latest JRE version from within a particular JRE family ("1.5*")
Selection of a particular JRE family or the latest version on a particular PC ("1.5+")

Additional information about this parameter may be seen at

java_version parameter

Examples with Forms

The following examples assume you have JRE 1.6.0_11, JRE 1.5.0_12 and JRE 1.5.0_17 on your PC.

1. Modify the ORACLE_HOME/forms/server/basejpi.htm to include the new "java_version" parameter. For example add the following to the basejpi.htm:

Add the following to the
java_version="%java_version%"

 

Note: If using webutil, add this to webutiljpi.htm.

2. Add the following to the ORACLE_HOME/forms/server/formsweb.cfg

[javaversion]
java_version=1.5.0_12  
#java_version=1.6+ 
#java_version=1.5* 
baseHTMLJInitiator=basejpi.htm 
jpi_classid=clsid:8AD9C840-044E-11D1-B3E9-00805F499D93 
jpi_mimetype=application/x-java-applet;version=1.6 
jpi_download_page=http://java.sun.com/javase/downloads/index.jsp 
jpi_codebase=http://java.sun.com/update/1.6.0/jinstall-6u16-windows-i586.cab#Version=1,6,0,16

With the two java_version parameters commented out as above, JRE 1.5.0_12 will be used since it is specified. 
If you wished to use the latest 1.5.0_X version on the PC (in this case 1.5.0_17) you could comment out all the java_version tags except for "java_version=1.5*" 

If you wished to use the latest JRE on the PC - in this case, 1.6.0_11 - then you would comment out all java_version tags except for "java_version=1.6+" 

For the Mozilla family of browsers such as Firefox, you can specify to use the latest version of 1.6.0_X on your machine with the jpi_mimetype parameter as specified above.  This feature in Firefox does not work as of 3.5.5.  A firefox bug has been created. Additional information may be obtained at

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6452817

Using the EMBED Tag

Additionally, refer to the Classid Attribute in the IE section of the document for a better explanation of how it can be used:

Classid Attribute

 

Note on auto-download:  Backward Compatibility section states -> In conjunction with these backward compatibility mechanisms, auto-downloading of any JRE, either the one supplying the new Java Plug-In or the one to be used to run the applet, is not supported

. 

 

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