DBVisualizer 7.0.5启动出错
DB2启动是报以下错误，导致无法使用：
An internal error occurred:

java.lang.ClassCastException: javax.swing.KeyStroke cannot be cast to java.lang.Comparable

The error may have affected the application state.
Please notify vendor.

Stack Trace:

java.lang.ClassCastException: javax.swing.KeyStroke cannot be cast to java.lang.Comparable
    at java.util.TreeMap.compare(Unknown Source)
    at java.util.TreeMap.put(Unknown Source)
    at java.util.TreeSet.add(Unknown Source)
    at com.onseven.dbvis.K.E.ā(Z:2561)
    at com.onseven.dbvis.U.A.J$B.<init>(Z:3492)
    at com.onseven.dbvis.U.A.J.<init>(Z:210)
    at com.onseven.dbvis.U.C.?(Z:309)
    at com.onseven.dbvis.U.C.?(Z:3076)
    at com.onseven.dbvis.U.C.<init>(Z:270)
    at com.onseven.dbvis.U.F.?(Z:3093)
    at com.onseven.dbvis.U.F.<init>(Z:217)
    at com.onseven.dbvis.DbVisualizerGUI$2$1.ā(Z:3020)
    at se.pureit.swing.A.O$2.run(Z:1192)
    at java.lang.Thread.run(Unknown Source)

错误原因：是因为更新了JDK7所造成的。
解决办法：卸载掉JDK7，就可以了。