It seems I can fix it by changing source and target to 1.7 (instead of 1.5) in pom.xml:
But I wonder why this is necessary now? I think in the past it used to work with 1.5.
Kirill, did you have to do the same change to pom.xml in order for your code to work? Or is there some other way how I can fix this?
Exception in thread "main" java.lang.UnsupportedClassVersionError: edu/emory/mathcs/jtransforms/fft/DoubleFFT_2D : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at org.openpixi.pixi.physics.fields.PoissonSolverFFTPeriodic.solve(PoissonSolverFFTPeriodic.java:31)
at org.openpixi.pixi.physics.grid.Grid.set(Grid.java:247)
at org.openpixi.pixi.physics.grid.Grid.<init>(Grid.java:222)
at org.openpixi.pixi.physics.grid.GridFactory.createSimpleGrid(GridFactory.java:17)
at org.openpixi.pixi.physics.Simulation.<init>(Simulation.java:70)
at org.openpixi.pixi.physics.InitialConditions.initRandomParticles(InitialConditions.java:65)
at org.openpixi.pixi.ui.Particle2DPanel.<init>(Particle2DPanel.java:111)
at org.openpixi.pixi.ui.MainControlApplet.<init>(MainControlApplet.java:443)
at org.openpixi.pixi.ui.MainControlApplet.main(MainControlApplet.java:816)