Example of COBOL using Java classes to get date and time zone information |
The attached program 'calendar.cbl' uses OOP to return information about a passed date and the current time using the java.util.GregorianCalendar and other related classes.
You can compile and run it as follows:
iscc calendar.cbl
iscrun CALENDAR
For instance, running the program with this command:
iscrun CALENDAR 20230215
returns this information:
Getting information for 20230215
ERA: 1
YEAR: 2023
MONTH: 1
WEEK_OF_YEAR: 7
WEEK_OF_MONTH: 3
DATE: 15
DAY_OF_MONTH: 15
DAY_OF_YEAR: 46
DAY_OF_WEEK: 4
DAY_OF_WEEK_IN_MONTH: 3
Getting information for current time
AM_PM: 0
HOUR: 9
HOUR_OF_DAY: 9
MINUTE: 40
SECOND: 15
MILLISECOND: 549
ZONE_OFFSET: -8
DST_OFFSET: 0
This program was based on the attached Java example, also found here: http://java.sun.com/javase/6/docs/api/java/util/GregorianCalendar.html
The DAY_OF_WEEK in the example above is '4', which means it's a Wednesday.
Another way to get the text of the day of the week is to use java.time classes.
You can compile and run this attached sample as follows:
iscc day-of-week.cbl
iscrun DAY_OF_WEEK
The output for February 15, 2023 is WEDNESDAY.
Another way to work with the date and day is using isCOBOL and intrinsic functions.
Knowledge Base Article # 336 talks about how to manipulate dates using intrinsic functions.
The sample programs installed in $ISCOBOL/sample/is-java/iscobol-uses-cobol-object shows how to use these intrinsic functions in class-id programs, creating COBOL objects that can then be used in programs using OOP, similar to how the examples in this KB article use native Java objects.
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by: Veryant Support
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