我正在尝试编译这个java类_MyServerStub.java但我收到此错误
cannot find symbol
symbol : class ServantObjectExt
location: package org.omg.CORBA.portable
if ( _so instanceof org.omg.CORBA.portable.ServantObjectExt)
^
stock/_MyServerStub.java:83: cannot find symbol
symbol : class ServantObjectExt
location: package org.omg.CORBA.portable
((org.omg.CORBA.portable.ServantObjectExt)_so).normalCompletion();
^
stock/_MyServerStub.java:88: cannot find symbol
symbol : class ServantObjectExt
location: package org.omg.CORBA.portable
if ( _so instanceof org.omg.CORBA.portable.ServantObjectExt)
^
stock/_MyServerStub.java:89: cannot find symbol
symbol : class ServantObjectExt
location: package org.omg.CORBA.portable
((org.omg.CORBA.portable.ServantObjectExt)_so).exceptionalCompletion(re);
^
stock/_MyServerStub.java:94: cannot find symbol
symbol : class ServantObjectExt
location: package org.omg.CORBA.portable
if ( _so instanceof org.omg.CORBA.portable.ServantObjectExt)
^
stock/_MyServerStub.java:95: cannot find symbol
symbol : class ServantObjectExt
location: package org.omg.CORBA.portable
((org.omg.CORBA.portable.ServantObjectExt)_so).exceptionalCompletion(err);
^
6 errors
_MyServerStub.java是来自jacORB的生成存根，因此代码没有错误。