打开终端运行，发现：
引用:Loading: net.java.games.input.LinuxEnvironmentPlugin
Failed to open device (/dev/input/event8): Failed to open device /dev/input/event8 (13)
Failed to open device (/dev/input/event7): Failed to open device /dev/input/event7 (13)
Failed to open device (/dev/input/event6): Failed to open device /dev/input/event6 (13)
Failed to open device (/dev/input/event5): Failed to open device /dev/input/event5 (13)
Failed to open device (/dev/input/event4): Failed to open device /dev/input/event4 (13)
Failed to open device (/dev/input/event3): Failed to open device /dev/input/event3 (13)
Failed to open device (/dev/input/event2): Failed to open device /dev/input/event2 (13)
Failed to open device (/dev/input/event1): Failed to open device /dev/input/event1 (13)
Failed to open device (/dev/input/event0): Failed to open device /dev/input/event0 (13)
Linux plugin claims to have found 0 controllers
使用root权限运行，一切正常，查阅了一些资料，应该是ibus和java的冲突问题，把ibus退出，也可以正常输入了。
类似的使用Java环境的游戏也有这种问题，譬如Minecraft。
来源：openszone.com