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java Programming Glossary: expensiveIs it good practice to use java.lang.String.intern()? http://stackoverflow.com/questions/1091045/is-it-good-practice-to-use-java-lang-string-intern strings is that the intern method is relatively expensive. It has to manage the pool of unique strings so it does a fair..
How to check if a String is a numeric type in Java http://stackoverflow.com/questions/1102891/how-to-check-if-a-string-is-a-numeric-type-in-java exceptions being thrown for each failure which is a fairly expensive operation. An alternative approach may be to use a regular expression..
How to append text to an existing file in Java http://stackoverflow.com/questions/1625234/how-to-append-text-to-an-existing-file-in-java the file . Using a BufferedWriter is recommended for an expensive writer i.e. a FileWriter and using a PrintWriter gives you access..
Instance variable initialization in java http://stackoverflow.com/questions/1994218/instance-variable-initialization-in-java your field. In cases when initializing a field is an expensive operation you may initialize it as soon as it is needed ExpensiveObject..
Why JSF calls getters multiple times http://stackoverflow.com/questions/2090033/why-jsf-calls-getters-multiple-times 13 Getting some property If the value of someProperty is expensive to calculate this can potentially be a problem. I googled a.. at all. However the story changes when you're performing expensive DB business logic in the getter method for some reason. This.. per the Javabeans specification . They should not do any expensive DB business logic at all. For that the bean's post constructor..
Populating child dropdownlists in JSP/Servlet http://stackoverflow.com/questions/2263996/populating-child-dropdownlists-in-jsp-servlet is however that this may become unnecessarily lengthy and expensive when you have a lot of items. Imagine that you have 3 steps..
http://stackoverflow.com/questions/2707322/what-is-null-in-java used where it's replaced by the real value which may be expensive to compute . There are also other uses. Let's take a real example..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading use of the same instance. It would otherwise have been too expensive to recreate it on every request. But you should also realize..
How to generate a random alpha-numeric string http://stackoverflow.com/questions/41107/how-to-generate-a-random-alpha-numeric-string Here is code for secure easy but a little bit more expensive session identifiers. import java.security.SecureRandom public.. other's sessions. Note that SecureRandom objects are expensive to initialize so you'll want to keep one around and reuse it...
Any good graphing packages for Android? [closed] http://stackoverflow.com/questions/424752/any-good-graphing-packages-for-android is in a poor connectivity situation where network usage is expensive unlocked phones in resource poor settings . java android graph..
http://stackoverflow.com/questions/435553/java-reflection-performance Looking up a class via reflection is by magnitude more expensive. Quoting Java's documentation on reflection Because reflection..
Determine if a String is an Integer in Java [duplicate] http://stackoverflow.com/questions/5439529/determine-if-a-string-is-an-integer-in-java s.charAt i radix 0 return false return true A more expensive non exception based method public static boolean isInteger String..
Virtual Memory Usage from Java under Linux, too much memory used http://stackoverflow.com/questions/561245/virtual-memory-usage-from-java-under-linux-too-much-memory-used benefit to be gained by doing so and the potential for an expensive page fault if the process touches the page in the future. As.. are getting collected. Accessing the disk ie a database is expensive and memory is cheap. If you can trade one for the other do so...
How to reference components in JSF ajax? Cannot find component with identifier “foo” in view http://stackoverflow.com/questions/8634156/how-to-reference-components-in-jsf-ajax-cannot-find-component-with-identifier components in the same view which is a relatively expensive job by the way . If this all still doesn't work then verify..
http://stackoverflow.com/questions/948549/open-source-java-profilers requirement is it should be open source or has not too expensive academic licence . java profiler share improve this question..
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