Jar compatibility from java6 to java8

Question

Im upgrading my web application from java 6 to java 8. I'm using a list of jars in my web application. Is there any tool/mechanism available to check whether the lib jars compatible with java 8?

Thanks

T.J. Crowder · Accepted Answer · 2017-08-16 09:30:57Z

3

Java 8's JVM can run Java 6 code just fine. It's the other direction that's an issue, but running older code on newer JVMs isn't a problem.

Obviously, you'll want to test thoroughly before doing this in production.

edited Aug 16, 2017 at 9:30

answered Aug 16, 2017 at 9:28

T.J. Crowder

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3 Comments

Eugene Over a year ago

it could have minor hiccups (we had such issues with generics with some bug fixes in 8 that were not present in 7)...

T.J. Crowder Over a year ago

@Eugene: Ouch. Obviously, important to test. :-) But if code was (inadvertently) relying on buggy behavior...

Michal Over a year ago

Java7 introduced new methods on JDBC interfaces. That change broke backwards compatibility of existing Java6 JDBC drivers.

Michal · Accepted Answer · 2017-08-16 12:28:55Z

1

Have a look at Compatibility Guide for JDK 8 and Java SE 7 and JDK 7 Compatibility.

Be aware that one of the incompatibilies is that JDBC changed in Java7 and these changes are not backwards compatible. So if you use JDBC in your application then you need upgrade to Java7+ compatible JDBC driver(s).

answered Aug 16, 2017 at 12:28

Michal

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