ISO/IEC INTERNATIONAL STANDARD 20970 First edition 2002-07-01 Information technology Programming languages, their environments and system software interfaces JEFF file format Technologies de I'information Langages de programmation, leurs environnements et interfaces de logiciel systeme - Format de fichier JEFF Reference number ISO/IEC 20970:2002(E) IEC Tso @ISO/IEC2002 No r HS under ted without license from IHS Not for Resale ISO/IEC 20970:2002(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not this area. Adobe is atrademarkof Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the ? ISO/IEC2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic in the country of the requester. ISO copyright office Case postale 56: CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.ch Printed in Switzerland @ISO/IEC2002-Allrightsreserved Not for Resale ISO/IEC 20970:2002(E) Contents Page Foreword... 0 Introduction... .vi 0.1 What is JEFF vi O.1 Benefits.... vi Scope and normative references 1.1 Scope.... 1.2 Normative references. 1.3 Definitions... 2 Data Types . 2.1 Basic Types. 2.2 Language Types. 2.3 Strings .... 2.3.1 Definition .... 2.3.2 2.3.3 Representation... 2.4 Specific Types ... 2.4.1 AccessFlags 2.4.2 Type Descriptor... 2.4.3 File Structure. 3.1 Definitions.. 8 3.1.1 Fully Qualified Names. 3.1.2 Internal Classes and External Classes . 3.1.3 Fields and Methods .. 3.1.4 Field Position. 9 3.2 Conventions.. 3.2.1 Notations.... 10 3.2.2 Byte Order.. 3.2.3 Alignment and Padding . 10 3.3 Definition of the File Structures .. 3.3.1 File Header..... 3.3.2 Class Section.. 14 3.3.2.1 Class Header 3.3.2.2 Interface Table .. 3.3.2.3 Referenced Class Table 16 3.3.2.4 InternalFieldTable. 3.3.2.5 Internal Method Table .. 3.3.2.6 Referenced Field Table. 19 3.3.2.7 Referenced Method Table 3.3.2.8 Bytecode Block Structure... 3.3.2.9 Exception Table List.. 21 3.3.2.10 Constant Data Section . 3.3.3 Attributes Section .. 23 3.3.3.1 Attribute Type. 24 3.3.3.2 Class Attributes. 24 3.3.3.3 Attribute Table.. 3.3.4 Symbolic Data Section . 25 3.3.5 Constant Data Pool...... 27 3.3.5.1 Constant Data Pool Structure 27 3.3.5.2 Descriptor.. 3.3.5.3 Method Descriptor. .28 3.3.6 Digital Signature .. Copyrgh IntemaonaOganzationfor Siandadizainhts reserved ii Not for Resale