The problem is that PDFBox 2.* is for java 6 and higher, it can't be built on jdk > 11 unless you change the target version in the maven-compiler-plugin settings (several places). See also
https://issues.apache.org/jira/browse/PDFBOX-4715

Your text below doesn't mention an error, only a warning. And "1.8.0_60" contradicts "recent java".

Tilman

Am 15.01.2021 um 03:43 schrieb Alexander Regueiro:
Hello,

Attempting to build PDFBox 2.0.22 on macOS 11.1, Java 1.8.0_60, yields the 
following error:

```
[WARNING] Rule 1: org.apache.maven.plugins.enforcer.RequireJavaVersion failed 
with message:
Requires at least Java 7, and
                                             Java versions higher than 11 cannot
                                             build Java 6 bytecode
```

Does building PDFBox really require such an outdated version of Java?

Any advice would be appreciated.

Thanks,
Alex
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