キーボードによるフォーカス処理をタイトル画面に限定化

java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
jp.ac.kansai_u.kutc.firefly.packetArt.TimerThread.run(TimerThread.java:67)
Caused by: java.lang.NullPointerException
at
jp.ac.kansai_u.kutc.firefly.packetArt.playing.PlayForm.update(PlayForm.java:152)
... 4 more
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
jp.ac.kansai_u.kutc.firefly.packetArt.TimerThread.run(TimerThread.java:67)
Caused by: java.lang.NullPointerException
at
jp.ac.kansai_u.kutc.firefly.packetArt.playing.PlayForm.update(PlayForm.java:152)
... 4 more