IsCOBOL supports OO (Object Oriented syntax) that allows you to invoke a Method in a Java Class. To have additional help on writing the cobol code, isCOBOL IDE helps with its integrated isCOBOL Editor.
For example, to know the operating system where Java is running, we can invoke the "getProperty" method in "java.lang.System" class passing "os.name" as parameter.

              set buffer = Sys:>getProperty("os.name")

In the isCOBOL IDE, after writing "Sys:>" the list of available methods shows up and by choosing a method in the list, the JavaDoc explains what that method does (see the screen shot below).

1. How do I compile for compatibility with older versions of Java?
2. When can I get the "java.net.SocketException: Permission denied:connect" message? And how can it be avoided?
3. How do I resolve "code too large for try statement" errors?
4. How do I migrate indexed files to a format that is supported by isCOBOL?
5. How do I prevent hackers from decompiling Java class files to reverse engineer my COBOL application?
6. How can I read an Excel spreadsheet from COBOL?
7. Does SET ADDRESS OF X TO Y work?
8. What Micro Focus library routines are supported?
9. Do I need to worry about the compile warning "Note: MYPROG.java uses unchecked or unsafe operations?"
10. What tools are available for automated functional (regression) testing of a COBOL application?
11. Did you know you can create temporary files in memory?
12. Where can I obtain a copy of the ANSI 2002 COBOL standard?
13. Is there currently a way to debug COBOL and Java source together?
14. How do I increase the maximum Java heap size when compiling?
15. How do I turn on debug trace to produce a log file?
16. How do I determine what properties are set?
17. Should I use JISAM or Veryant's c-treeRTG?
18. How would I create my own CBL_ALLOC_MEM and CBL_FREE_MEM routines?
19. Why do I get a compile error "--S: Invalid open mode" on an OPEN I-O of an ORGANIZATION LINE SEQUENTIAL file?
20. What is the best way to control Microsoft Word?
21. How can I use the F10 key in my application without it changing the keyboard focus?
22. How do I use conditional compilation?
23. How do I specify properties or a properties file on the command line?
24. Where can I find more information on A$ENCRYPT and A$DECRYPT?
25. Does isCOBOL work with Flexus COBOL sp2?
26. How do I change the icon in the upper left corner of the Window?
27. How does a program detect at runtime whether it is running standalone GUI, thin client or with Web Direct 2.0?
28. What is the behavior difference of STOP THREAD?
29. What are the defaults for the DATE-ENTRY control DISPLAY-FORMAT property and format styles?
30. Sending SMTP mail
31. How would I create my own CBL_CHECK_FILE_EXIST routine?
32. Is the isCOBOL 2009 SP1 release intended to deploy mainframe applications over the cloud? Or is it an integration mechanism for bringing in cloud data and apps?
33. How do I select 11x17 paper size using WIN$PRINTER?
34. Where can I learn more about Classpath, the Java class loader, JDK tools and utilities?
35. What are the key technical advantages of isCOBOL?
36. Why do I get the error message "Native call not found" and how do I fix the problem?
37. Why do I get the error java.lang.NoClassDefFoundError: com/iscobol/rts_n/StopRunException?
38. Can Veryant recommend a good Web site to find 3rd party JavaBeans?
39. Does isCOBOL run on Linux on System z?
40. I still get the error : "Missing License: The license key is missing, invalid or has expired!" I can't figure out why
41. What compile option should I use for ICOBOL compatibility?
42. How do I compile fixed (ANSI) format source that COPYs terminal format source or vice versa?
43. Can isCOBOL access a DLL or .so that is in a JAR file?
44. Can I use directory paths in CALL names?
45. How do I configure file locations with environment variables?
46. Is your runtime library backward compatible?
47. What algorithm does isCOBOL use to load framework properties (runtime config variables)?
48. How can I make my isCOBOL program to be called instead of a C routine when both have the same name?
49. How do I set iscobol.file.index.FileName with variable file name assignments?
50. What is the easiest and/or best way to convert a legacy text-based user interface to a web front end?
51. How do I specify which file status codes I want to use?
52. Is isCOBOL backward compatible?
53. Does isCOBOL APS run on z/OS?
54. Is there any equivalent to COPY RESOURCE?
55. Does isCOBOL support C$REDIRECT?
56. Why do I get the error message “java.lang.UnsatisfiedLinkError: no ### in java.library.path?
57. How do I write my own replacement for a C$ library routine?
58. What is the best way to profile an isCOBOL program?
59. What should I use for USAGE HANDLE items instead of NULL?
60. How can I avoid the "java.lang.OutOfMemoryError: PermGen space" error?
61. Can you derive isCOBOL object classes from Java and vice versa?
62. Is there any way to use isCOBOL with SCO 5.0.6 (JDK 1.3)?
63. Can the file system (iscobol.file.index) be set programmatically?
64. How can I tell what changes were made in the isCOBOL latest update?
65. I've heard there is a problem passing pointers to C functions. What is it?
66. How can I monitor a jvm started on a remote computer box?
67. How do I get more information when I get java.lang.reflect.InvocationTargetException?
68. Does isCOBOL support Crystal Reports or other Report Writers?
69. How do I suppress multiple reserved words with the -rw compiler option?
70. Why do I get the error message "java.lang.ArrayIndexOutOfBoundsException" ?
71. Why do I get the error message "java.lang.NullPointerException" ?
72. Can I call an RMCobol program passing parameters to it?
73. What does mean the error NO X11 DISPLAY?
74. How can I encode a URL String?
75. What can I use to perform an email validation during entry-field accept?
76. Working with sequential files on Pipes
77. How do I resolve the error "java.lang.NoClassDefFoundError" or "java.lang.ClassNotFoundException"?
78. Does isCOBOL support C$XML or other XML interfaces?
79. Is there any way to direct the output from the "Print Screen" keyboard key directly to a printer?
80. Why do I get the error "Could not load the main class" ?
81. Did you know you could set a background image from isCOBOL IDE's painter?
82. Did you know that in a string you can replace a text with a new one with a different length by using the C$REPLACE_ALL routine?
83. Did you know how to write custom information inside isCOBOL log file?
84. How to programmatically set the attributes for PDFs?
85. How can I read data correctly from a line-sequential file that has a different encoding from the one used by isCOBOL?
86. Did you know you can encrypt the communication with the isCOBOL Server?
87. GIT Server (Linux) - Install and Configuration
88. Did you know these two ways of finding out the working directory in use?
89. Activating and Check the isCOBOL License
90. How to search by key with case insensitive on ISAM files
91. How can I read a data written with a different encoding?
92. How do I point my installed isCOBOL to a different Java location?
93. May I create my own type definitions and reuse them?
94. How can I use the Call/Cancel custom HOOK program to get the start and end time of every CALLed program?
95. How can I tell if my application is running in the WebClient environment or another environment?
96. How can I generate QR codes from COBOL?
97. Can I define one or more data items based on the definition of another one?
98. How can you wait for several threads to finish?
99. Guide to Updating the isCOBOL Software Version in a Standalone, Fat Client or Thin Client Production Environment