Example: Call Java from RPG

This is an example of an RPG program that uses the QCMDEXC API to call the Java™ Hello program.

Note: By using the code examples, you agree to the terms of the Code license and disclaimer information.
     D*             DEFINE  THE PARAMETERS FOR THE QCMDEXC API
     D*
     DCMDSTRING        S             25    INZ('JAVA CLASS(''com.ibm.as400.system.Hello'')')
     DCMDLENGTH        S             15P 5 INZ(25)
     D*             NOW THE CALL TO QCMDEXC WITH THE 'JAVA' CL COMMAND
     C                   CALL      'QCMDEXC'
     C                   PARM                    CMDSTRING
     C                   PARM                    CMDLENGTH
     C*       This next line displays 'DID IT' after you exit the
     C*       Java Shell via F3 or F12.
     C     'DID IT'      DSPLY
     C*       Set On LR to exit the RPG program
     C                   SETON                                        LR
     C
Parent topic: Interprocess communications
Parent topic: Code examples for the IBM Developer Kit for Java
Related concepts
Use sockets for interprocess communication
Use input and output streams for interprocess communication
Example: IBM i5/OS PASE native method for Java
Related tasks
Example: Run the Java Performance Data Converter
Related reference
Example: Call Java from C
Example: Internationalization of dates using the java.util.DateFormat class
Example: Internationalization of numeric display using the java.util.NumberFormat class
Example: Internationalization of locale-specific data using the java.util.ResourceBundle class
Example: Access property
Example: BLOB
Example: CallableStatement interface for IBM Developer Kit for Java
Example: Remove values from a table through another statement's cursor
Example: CLOB
Example: Create a UDBDataSource and bind it with JNDI
Example: Create a UDBDataSource, and obtain a user ID and password
Example: Create a UDBDataSourceBind and set DataSource properties
Example: DatabaseMetaData interface for IBM Developer Kit for Java - Return a list of tables
Example: Datalink
Example: Distinct types
Example: Embed SQL Statements in your Java application
Example: End a transaction
Example: Invalid user ID and password
Example: JDBC
Example: Multiple connections that work on a transaction
Example: Obtain an initial context before binding UDBDataSource
Example: ParameterMetaData
Example: Change values with a statement through another statement's cursor
Example: ResultSet interface for IBM Developer Kit for Java
Example: ResultSet sensitivity
Example: Sensitive and insensitive ResultSets
Example: Set up connection pooling with UDBDataSource and UDBConnectionPoolDataSource
Example: SQLException
Example: Suspend and resume a transaction
Example: Suspended ResultSets
Example: Test the performance of connection pooling
Example: Test the performance of two DataSources
Example: Update BLOBs
Example: Update CLOBs
Example: Use a connection with multiple transactions
Example: Use BLOBs
Example: Use CLOBs
Example: Use JTA to handle a transaction
Example: Use metadata ResultSets that have more than one column
Example: Use native JDBC and IBM Toolbox for Java JDBC concurrently
Example: Use PreparedStatement to obtain a ResultSet
Create and populate a DB2CachedRowSet
Example: Use the Statement object's executeUpdate method
Examples: JAAS HelloWorld
Example: JAAS SampleThreadSubjectLogin
Sample: IBM JGSS non-JAAS client program
Sample: IBM JGSS non-JAAS server program
Sample: IBM JGSS JAAS-enabled client program
Sample: IBM JGSS JAAS-enabled server program
Examples: IBM Java Secure Sockets Extension
Example: Call a CL program with java.lang.Runtime.exec()
Example: Call a CL command with java.lang.Runtime.exec()
Example: Call another Java program with java.lang.Runtime.exec()
Example: Use input and output streams for interprocess communication
Example: Java Invocation API
Examples: Use the Java Native Interface for native methods
Example: Use sockets for interprocess communication
Examples: Change your Java code to use client socket factories
Examples: Change your Java code to use server socket factories
Examples: Change your Java client to use secure sockets layer
Examples: Change your Java server to use secure sockets layer