CallJ

Call Java Class Method from Infobasic(T24)

Create a java program

Use the code editor or IDE such as IntelliJ or Eclipse

Create jar file

1. Navigate to your project folder
2. Compile source code $ javac *.java
3. Create a manifest file $ echo Main-Class: Main > manifest.txt
4. Create Jar file: $ jar cvfm [jarname].jar manifest.txt *.class
5. Test your jar: $ java -jar [jarname]

Create infobasic proram

Syntax

CALLJ class_name, [$]method_name, param SETTING ret [ON ERROR] err_statement

Basic Sample:

0001  PROGRAM TestCallJ
0002
0003     class_name = "io.mathisi.test.Greeting"
0004     method_name = "hello"
0005     param = "Aaron"
0006
0007     CALLJ class_name, method_name, param SETTING ret ON ERROR
0008         err = SYSTEM(0)
0009         CRT "Error code ": err
0010         RETURN
0011     END
0012
0013     CRT "Received from Java": ret 
0014
0015 END

Errors

Code	Description
1	Fatal error creating thread
2	Cannot create JVM
3	Cannot find class
4	Unicode conversion error
5	Cannot find method
6	Cannot find object constructor
7	Cannot instantiate object