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17 Jul 08

Quartz - Quartz 1 - CronTriggers Tutorial

  • Format



    A cron expression is a string comprised of 6 or 7 fields separated by white space. Fields can contain any of the allowed values, along with various combinations of the allowed special characters for that field. The fields are as follows:












































    Field NameMandatory?Allowed ValuesAllowed Special Characters
    SecondsYES0-59, - * /
    MinutesYES0-59, - * /
    HoursYES0-23, - * /
    Day of monthYES1-31, - * ? / L W C
    MonthYES1-12 or JAN-DEC, - * /
    Day of weekYES1-7 or SUN-SAT, - * ? / L C #
    YearNOempty, 1970-2099, - * /


    So cron expressions can be as simple as this: * * * * ? *

    or more complex, like this: 0 0/5 14,18,3-39,52 ? JAN,MAR,SEP MON-FRI 2002-2010

26 Jun 08

gotchas : Java Glossary

Java 被認為不好設計的語言特性列表。
當然，Java肯定不是一個十全十美的程式語言，發現不好的設計，其實也是一種進步。看一看，究竟我們這些Java programmer算不算是在泥巴裡面打仗。

mindprod.com/gotchas.html - Preview

gotchas java

  • A gotcha is a nasty surprise in the Java language or the standard libraries.
21 Jun 08

Functional programming in the Java language

In this article, author Abhijit Belapurkar shows you how to use functional programming constructs such as closures and higher order functions to write well-structured, modular code in the Java language.

www.ibm.com/...j-fp.html - Preview

closure java programming dw article functional

  • Essentially, closures are objects that act as functions and can be operated upon as objects.
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