Which version of J2SE should I download.

Thread view:

Sanny - 14 Nov 2007 08:26 GMT

For Applets I want them to run on as many computers as possible.

If I Compile with J2SE 5.0 Will people with JVM 1.3, JVM 1.4 will be
able to run the Applets. The features I will be using are only of Java
1.2 But compile with Java 1.5. So will those browsers with Java 1.2,
1.3 or 1.4 be able to view my applets?

Secondly I found www.sun.com/ Offline. So where else can I download
latest J2SE. from.

If I use J2SE 1.6 will those using 1.4 be able to view the applets. As
I am only using features that were available in JDK 1.2.

How many people have the Higher Versions of JDK downloaded on their
compouter? 1.5/ 1.6?

Does applets run faster when compiled with Higher versions Or they run
at same speed?

Bye
Sanny.

Reply to this Message

Andrew Thompson - 14 Nov 2007 08:47 GMT

>For Applets I want them to run on as many computers as possible.
>
>If I Compile with J2SE 5.0 Will people with JVM 1.3, JVM 1.4 will be
>able to run the Applets.

To ensure they can, you need to speficy the -srouce, -target and
most importantly -bootclasspath when compiling.

> The features I will be using are only of Java
>1.2 But compile with Java 1.5. So will those browsers with Java 1.2,
>1.3 or 1.4 be able to view my applets?

If the options above are used (all of them), yes.
...

>Does applets run faster when compiled with Higher versions Or they run
>at same speed?

No, though most applets will run faster on a later
JRE, as Sun improves JIT algorithms and such.

Signature

Andrew Thompson
http://www.athompson.info/andrew/

Reply to this Message

Lew - 14 Nov 2007 14:43 GMT

>> For Applets I want them to run on as many computers as possible.

Applets run on many computers, but few browsers. On my computer I cannot run
applets at all (some fubar between Firefox and 64-bit Linux, or else in how
Fedora packages the browser), but I can run Java Web Start programs.

>> If I Compile with J2SE 5.0

Java 5 is old. Use Java 6.

>> Will people with JVM 1.3, JVM 1.4 will be able to run the Applets.
>
> To ensure they can, you need to speficy the -srouce, -target and
> most importantly -bootclasspath when compiling.

I recommend that you develop in Java 6 with the options that Andrew mentions.
I suggest that you /target/ Java 1.4 (1.3 being far too old and obsolete, to
boot). You will need a 1.4 JRE to satisfy the -bootclasspath option. You can
have multiple JREs / JDKs on your system.

>> The features I will be using are only of Java
>> 1.2 But compile with Java 1.5. So will those browsers with Java 1.2,
>> 1.3 or 1.4 be able to view my applets?

Use 1.4 as your target.

> If the options above are used (all of them), yes.
> ...
>> Does applets run faster when compiled with Higher versions Or they run
>> at same speed?

> No, though most applets will run faster on a later
> JRE, as Sun improves JIT algorithms and such.

They run fastest on a Java 6 JVM.

Signature

Lew

Reply to this Message

Andrew Thompson - 14 Nov 2007 15:12 GMT

>>> For Applets I want them to run on as many computers as possible.
>
>Applets run on many computers, but few browsers. On my computer I cannot run
>applets at all (some fubar between Firefox and 64-bit Linux, or else in how
>Fedora packages the browser), but I can run Java Web Start programs.

Thanks for reminding me. I'll have to try and find a way
to estimate* when JWS runs on more machines than
'applets in browsers'.

If the number of machines in which applets 'load' but are so
quirky** as to be unusable is included in applet 'failures', I
suspect the balance would already have tipped in favor of
using JWS - to reach the widest audience.

* Beyond scrying or WAGs, that is.

** I'll avoid the 'X' word. ;-)

Signature

Andrew Thompson
http://www.athompson.info/andrew/

Reply to this Message

Which version of J2SE should I download.

Free Magazines