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install notes about headless jdk

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Ben Fry
2021-08-13 21:31:57 -04:00
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README.md
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@@ -90,6 +90,12 @@ If you need to go back to Java 8 (i.e. to build Processing 3), you can use:
On Windows and Linux, you can set `JAVA_HOME` to point at the installation the way you would any other environment variable.
On Linux (Ubuntu 20.04 in particular), the headless version of OpenJDK may be installed by default. If so, you may get errors when trying to run tests in core:
java.lang.UnsatisfiedLinkError: Can't load library: /usr/lib/jvm/java-11-openjdk-amd64/lib/libawt_xawt.so
If so, use `sudo apt install openjdk-11-jdk` to install a full version. (You could also make use of the version downloaded by Processing itself to avoid duplication, but that's a little trickier to get everything bootstrapped and (sym)linked properly.)
And again, we'll have more complete instructions later once the dust settles.
### Eclipse