问Java - ClassNotFoundException我包含了这个类，但是为什么我会得到一个异常？

EN

public static Reservation[] openBinaryFile( String fileName )
{
    Reservation [] objArray = null;

    try
    { 
        ObjectInputStream inStream = new ObjectInputStream(
            new FileInputStream( fileName ) );

        objArray = (Reservation[])inStream.readObject();

        inStream.close();
    }
    catch( ClassNotFoundException e )
    {
        System.out.println( "Exception: ClassNotFoundException." );
    }

我已经包含了这个类，但是为什么我会得到一个异常？这个类和其他类在同一个包中。为什么我会得到这个异常？

编辑:这是堆栈跟踪运行: java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native方法的保留) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:252)的java.lang.ClassNotFoundException在java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) at java.lang.Class.forName0(本机方法) at java.lang.Class.forName(Class.java:247) at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:604) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496) at java.io.ObjectInputStreamjava.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at myViewer.DatabaseFile.openBinaryFile(DatabaseFile.java:42) at myViewer.Viewer的.readArray(ObjectInputStream.java:1624)。(Viewer.java:175) at myViewer.Viewer.main(Viewer.java:188)