Requesting supported JAR for Java8

[SatyaDileep]

Team,
Our platform still uses Java8 i.e all our classes are compiled on jdk8 and the Jar icepdf 7.0.2 seems to be compiled using java11. We are unable to use this as during runtime we get this error:
java.lang.UnsupportedClassVersionError: org/icepdf/core/pobjects/Document has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0

Can someone suggest if there is a version of icepdf that is compatible with java8?

• Our option to upgrade to java11 [platform] is ruled out due to lot of dependent modules and we will do it in future
• We can think of forking this library, replace dependencies and relevant imports and try = but that will induce lot of risk on our side.

[pcorless]

I've received a few request for this over the last two years. To date I've been hesitant to migrate back to Java8 as it is near end of life. I'll take a look at what the change set looks like for Java 8 and get back to you.

[SatyaDileep]

Thank you so much for the reply. Probably the imports and dependent libraries needs to be looked at.
For now we are using icepdf 6.2.2 and excluded bouncycastle from it and started using bouncycastle 1.67 so that vulnerability is addressed

[pcorless]

I suspect this question might be related to #282 but
https://github.com/pcorless/icepdf/releases/tag/icepdf-6.3.2 is the most recent snapshot before work began and will probably offer your a few improvements over 6.2.2.

[SatyaDileep]

Does this version work hand in hand with java8?

[edrobal]

Hello.
With some minor changes, I have compiled and use icepdf with java 8. In fact, there is not much to justify targeting java 11. And even nothing in my opinion. There is still a problem displaying an image. Be continued...

[edrobal]

Now I'm using icepdf 7.1.2 in production. I write some replacement for very usefulness method from java 11. We need also last version of apache pdfbox.

[pcorless]

Be great if you could post a PR so the work could be pulled back into the master branch.

[edrobal]

After finding other problems (registration among others) and finding the methods used in icepdf too complicated, I decided to restart my development based only on apache pdfbox.

[pcorless]

Registration?