Tested using jdk7 promoted b130. jconsole will throw ExceptionInInitializerError when started in ja or zh_CN locale environment.

bash-3.2$ locale
LANG=ja_JP.UTF-8
:
LC_ALL=ja_JP.UTF-8
bash-3.2$ jconsole
Exception in thread "main" java.lang.ExceptionInInitializerError
        at sun.tools.jconsole.JConsole.<clinit>(JConsole.java:89)
Caused by: java.lang.ClassCastException: sun.tools.jconsole.resources.JConsoleResources_ja cannot be cast to sun.tools.jconsole.resources.JConsoleResources
        at sun.tools.jconsole.Resources.<clinit>(Resources.java:43)
        ... 1 more

Following change in b130 seems to be the cause.

@@ -44,7 +44,7 @@
  * or if the keys ends with ".mnemonic", an element
  * representing a mnemomic keycode <code>int</code> or <code>char</code>.
  */
-public class JConsoleResources_ja extends JConsoleResources {
+public class JConsoleResources_ja extends ListResourceBundle {

     /**
      * Returns the contents of this <code>ResourceBundle</code>.