Error opening .java files

[Jeff Rancier]

I did the reset and open a .java file, and I still get the same kind of
error:

File mode specification error: (wrong-type-argument vectorp nil)
Fontifying Count.java...
Fontifying Count.java... (regexps.............)
File mode specification error: (wrong-type-argument vectorp nil)

There is no prj.el file, only the source in the directory.  It is a very
small file:

public class Count
{
    public static void main( String args[] )
    {
        int i = 1;

        while ( i <= 100 )
        {
            if ( i == 47 )
                return;
            
            System.out.println( "i equals " + i++ );
        }
    }
}

Jeff