Demonstrations of COBOL

The following samples are supplied:

Airport Demo (JVM)

Shows a Java Web application with a JVM COBOL back-end that runs on an Apache Tomcat server.

Airport Demo (Native)

Shows how to use native COBOL to handle indexed data items. The demonstration is a console application that helps calculate the distance between two airports. The airport codes are stored in the airports.dat file.

Arrays (JVM)

Demonstrates the JVM COBOL syntax for arrays.

Collections (JVM)

Demonstrates how to use the LIST and DICTIONARY collection types in JVM COBOL.

Core (JVM)

This is an introduction in programming in JVM COBOL.

DB2 ECM - Connect

Shows the syntax variants for connecting to and disconnecting from a DB2 database using Type 1 CONNECTs that DB2 LUW supports.

DB2 ECM - Dynamic

Shows how to use dynamic SQL with DB2 LUW to perform various SQL operations.

DB2 ECM - LOB Data Types

Shows how to use the LOB LOCATOR and VALUES functions to retrieve Lob data from DB2 LUW.

DB2 ECM - Select

Shows how to use the singleton SELECT and the cursor-based FETCH statements with DB2 LUW.

DB2 ECM - Whenever

Shows how to use EXEC SQL WHENEVER for error handling, and DB2(MSGAREA) to specify a COBOL variable for retrieving error messages larger than 70 bytes.

Delegate Combining (JVM)

Shows how to combine delegates using the '+' and '-' operators.

Delegates (JVM)

Shows how to use delegates in COBOL for JVM.

Enums (JVM)

Demonstrates how to use enumeration in COBOL for JVM.

Events (JVM)

Shows how to attach a method to an event and then - to detach it.

Exception Handling (JVM)

Shows methods of exception handling in COBOL for JVM.

Extension Methods (JVM)

Demonstrates how to extend methods in COBOL for JVM.

Indexers (JVM)

Demonstrates how to use indexers in COBOL for JVM.

Iterators (JVM)

Demonstrates how to use iterators in COBOL for JVM.

JVM COBOL to Native COBOL Interop

Demonstrate how COBOL for JVM can interoperate with native COBOL.

Local Variables (JVM)

Demonstrates how to declare local variables in COBOL for JVM.

OESQL - Getting Started

Shows how to use static SQL with OpenESQL to perform various SQL operations.

OESQL - Getting Started with JDBC (JVM)

Shows how to use OpenESQL with JDBC and how to connect to a database using either Connection Strings or Data Sources.

OESQL - Behavior

Shows how to use the OpenESQL Compiler directives to assist in migrating database applications from the mainframe for offload development.

OESQL - Catalog

Shows the information about all data types supported by the data source, a list of all tables in the data dictionary, and information about the columns in the table 'orders'.

OESQL - Connect

Shows how to use static SQL with OpenESQL to perform various SQL operations.

OESQL - Dynamic

Shows how to use dynamic SQL with OpenESQL to perform various SQL operations.

OESQL - Select

Shows how to use singleton SELECT and cursor-based FETCH statements with OpenESQL.

OESQL - Whenever

Shows how to use EXEC SQL WHENEVER for error handling, and MFSQLMESSAGETEXT to retrieve error messages larger than 70 bytes.

Operator Overloading (JVM)

Demonstrates operator overloading in COBOL for JVM.

Optional Parameters (JVM)

Shows how to define methods with optional parameters and various ways to call such methods, including the use of named parameters.

Properties (JVM)

Demonstrates how to use properties in COBOL for JVM.

SwingBook (JVM)

Demonstrates how to use Java style inner-classes (SHARING PARENT) in JVM COBOL and shows the use of Swing with JVM COBOL. Swing is part of the Java Foundation Classes which provides an API for a graphical user interface (GUI) for JVM programs. The application shows a Swing front-end to the COBOL legacy book program which accesses an indexed data file with book stock information.

PI (Java)

Demonstrates a Java program receiving information from a COBOL program via the run-time system cobcall interface.

ARRAYS (Java)

Demonstrates how to read and update a Java array from procedural COBOL via the run-time system cobcall interface.

PrimTypes (Java)

Demonstrates a COBOL program reading and updating Java primitive types via the run-time system cobcall interface.

Record (Java)

Demonstrates creating a record item which is passed to COBOL which updates and returns the record.

tictac

Demonstrates how to develop native COBOL applications.