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Tag Archives: Java
Handling Dates
In a globally distributed system, there are some key patterns for handling dates so that they work reliably, performantly, and are unlikely to be misused by developers. Oddly, a number of new classes were added to Java which should be … Continue reading
Posted in Coding, Design Tagged calendar, date, distributed, formatting, Java, javascript, time Leave a comment
Constant Abuse 2
Some programmers believe that constants are the source of all goodness, because it means in the future that everything will be malliable. Particularly programmers paid by the hour. This is a mistake. Readibility suffers if constants are abused. I am … Continue reading
Don't Baby Your Builds
In a conversation this week, one developer insisted that a special build machine should be built to assure that the build is always comes out the same. My response: if your project is building differently on different machines, then you … Continue reading
Posted in Coding, practice Tagged build, Java, methodology, project management, projects Leave a comment
HttpServletRequest Path Decoding
The documentation on HttpServletRequest is very poor, and this fills in a critical set of facts that you need to know to write a TomCat application.
Don't Fear the Lowly Static Method
When people first learn object oriented programming (is there any other way) they seem to want to abandon all non-member methods (such as static methods) as being anti-object-oriented. This is foolish. There are times for objects, and times for static … Continue reading
Never Use StringTokenizer
You should Never Use StringTokenizer. That is a strong statement. It is a bit of an exaggeration. But in my experience, every case where StringTokenizer has been used that I have seen, has been an abuse of the original concept, … Continue reading
Public or Private Member Variables?
When is it OK to make member variables public?
Method Exception Signature
In short, all interface methods, if they throw anything, should be declared to throw ‘java.lang.Exception’ and never a specialized exception class. Find this surprising? then please read on. The original goal to allow methods to declare the type of exceptions … Continue reading
Posted in Coding, Design Tagged changes, declarations, errors, exceptions, Java, structure, types 3 Comments
File Path Manipulation
Three guidelines that make sense when handling files and paths. Never Use Backslash in File Paths Don’t use File.pathSeparator Converting slashes from the user
#27 Don't Declare Variables at the Top
Somewhere long ago you attended a course that said that all variables should be declared at the top of the method. Modern languages allow you to declare the variable at the point in the code that it is initialized and … Continue reading
Posted in Coding, Example Code Tagged compiler warnings, initialization, Java, structure Leave a comment