Improve behavior with Java 10

ImageJ2 and Fiji work with Java 10 but there are some annoyances that need to be addressed.

• The ImageJ launcher must be new enough to support it. The macOS version of Fiji already includes a new-enough launcher, but not yet for Windows and Linux. (If you want to try the latest version of the launcher, see this page.) We need to upgrade the launcher for all platforms.
• There is a console message on startup WARNING: An illegal reflective access operation has occurred which can be safely ignored. Further investigation needed regarding how best to address this.
• When starting up on macOS, there is a NoSuchMethodError thread dump on the console, and a NoClassDefFoundError thread dump in an Exception window. The former is due to Fiji attempting to patch the behavior of the Alt key. The latter is due to ImageJ1 attempting to add Mac-specific behavior using the obsolete com.apple.eawt API.
• Also from ImageJ1, a dialog box appears stating that JavaScript is not available, and asking to download it. It is unclear why ImageJ1 concludes this when running as part of ImageJ2, but behaves different when running vanilla.

[BarchSteel]

This may be an old thread, but I tested today with OpenJDK-11.0.9.1+1 and OpenJDK-14.0.2+12 on Windows 10 x64 ImageJ seems to run fine from Eclipse. Apart from the log4j warning, only the following warnings appear when using JDK 11 or JDK 14 instead of JDK 8:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by net.imagej.patcher.LegacyInjector (file:/.m2/repository/net/imagej/ij1-patcher/1.1.0/ij1-patcher-1.1.0.jar) to method java.lang.ClassLoader.findLoadedClass(java.lang.String)
WARNING: Please consider reporting this to the maintainers of net.imagej.patcher.LegacyInjector
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

[aschain]

I found that the minimaven Java 10+ errors seemed to be specific to Windows for me. I was able to run scripts on Fiji running on Java 13 with this change to org.scijava.minimaven: https://github.com/aschain/minimaven/commit/4a0139982ef9bb89398448d44eaa54b5990bb5fe It doesn’t seem to effect other systems (not linux at least), or when using Java 1.8. However, it’s a bit of a cludge to get it working. I did not figure out why the Coordinate in the MavenProject had malformed Strings.