Any JAVA Gurus out there? (Vanity)

5/12/2010 | theDentist

[theDentist]

Am looking for a Java Guru to explain a few Java programming issues to me.

[theDentist]

Hi, I am using an old application which uses Java 1.4.2 and 1.5 with Win2000 and IE 6. The application is closed and will never be updated, and the new equipment will not be installed for 4 or 6 months.

My issue is, users PCs are being upgraded, including newer versions of Java, which are incompatible with the old software.

Is there a way I can specify that when a particular URL is used, that the IE points to the older version of Java that remains on the user PC. In other words, when they look at newer applications, it will use Java 1.6, but when they put in the address (name or IP) of the old application, the IE or the PC will be pointed to 1.4.2_10?

[Cacique]

btt

[Reagan69]

I love coffee... what’s your question ?

[WakeUpAndVote]

Your issue may not be java, it may be IE. If you are running version IE8, you must view the URL in compatibility mode or some features will not work or show up.

[Michael Barnes]

freepmail

[dfwgator]

Why wouldn’t the old Java code run under Java 1.6? It should be backward compatible. Java .class files contain the version, and as long as the version is not newer than the JVM version, it should run fine, so I’m not sure I understand the problem here.

[theDentist]

Reports and such are fine, but real-time views... I get the Sun Java “sundial’ effect, where it just goes about in a circle and never populates. IE6 or IE8 will experience the problem. When I try it on a stand alone PC that I briefly connect to the net, works perfect.

[dfwgator]

I must admit, I’ve worked with Java for years, but have avoided applets like the plague.

[NoRedTape]

I would suggest cutting to the chase..............and calling Sun (Java).

Support phone is found HERE..................

[gcraig]

Use javascript to detect the browser version, and in an if selector load the particular applet that works for that browser.

if (navigator.appVersion == x) { loadOldApplet(); } else { loadNewApplet(); }

[Vendome]

hmmm....

try installing IE 5 or download a free copy of Microsoft Virtual Machine and have users launch from within to IE5

[valkyry1]

I am not a java guru but I like writing java

[VeniVidiVici]

Your app doesn’t download the needed Java upon connection? How about if you just uninstall any Java on the client box except for 1.4.2?

[ShadowAce]

[adamjefferson]

This depends if you have the applet source code. I’ll assume you don’t— If you do, its easy to update.. But if not, and you want it to work with newer versions of java, you need to hire someone to decompile the applet, fix and replace the out of date code, then recompile it back to a jar file. If its a small project, should just take a day or so. But the programmer would need to know how to use a decompiler, which most java programmers don’t use them very often.

[martin_fierro]

I know that Krakatoa is east of it.

[shorty_harris]

I saw that movie when it first came out, on a blistering hot day, inside a tiny, air-conditioned theater in Desert Hot Springs, CA.

[Constitution Day]

Perhaps Java Man can help?