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java Programming Glossary: avoidWhy is processing a sorted array faster than an unsorted array? http://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-array-faster-than-an-unsorted-array when the data is sorted. A general rule of thumb is to avoid data dependent branching in critical loops. such as in this..
Why is Java Vector class considered obsolete or deprecated? http://stackoverflow.com/questions/1386275/why-is-java-vector-class-considered-obsolete-or-deprecated a Vector for instance you still need to take out a lock to avoid anyone else changing the collection at the same time which would..
What is the difference between JSF, Servlet and JSP? http://stackoverflow.com/questions/2095397/what-is-the-difference-between-jsf-servlet-and-jsp
What is a Null Pointer Exception? http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception null In which case num is null. The best way to avoid this type of exception is to always check for null when you..
How to discover memory usage of my application in Android http://stackoverflow.com/questions/2298208/how-to-discover-memory-usage-of-my-application-in-android little use since the Java heap limit is there in part to avoid one app from being able to stress the system to this point... Typical systems will need to have 20MB or so for this to avoid getting into bad paging states the Android out of memory killer..
Avoiding “!= null” statements in Java? http://stackoverflow.com/questions/271526/avoiding-null-statements-in-java is to test if an object null before I use it. This is to avoid a NullPointerException . I find the code very ugly and it becomes.. and it becomes unreadable. Is there a good alternative to avoid this code snippet Update Pan I was not clear with my question... someobject null someobject.doCalc ... In this case I will avoid a NullPointerException and I don't know exactly if the object..
How to use java.net.URLConnection to fire and handle HTTP requests? http://stackoverflow.com/questions/2793150/how-to-use-java-net-urlconnection-to-fire-and-handle-http-requests send large POST requests e.g. uploading files . To avoid this you would like to set the HttpURLConnection#setFixedLengthStreamingMode..
How to avoid Java Code in JSP-Files? http://stackoverflow.com/questions/3177733/how-to-avoid-java-code-in-jsp-files to avoid Java Code in JSP Files I'm new to Java EE and I know that something.. of coding and in JSP version 2 there exists a method to avoid Java code in JSP files. Can someone please tell me the alternative.. itself also recommends in the JSP coding conventions to avoid use of scriptlets whenever the same functionality is possible..
When to use LinkedList<> over ArrayList<>? http://stackoverflow.com/questions/322715/when-to-use-linkedlist-over-arraylist the array must be resized if you add a lot of elements. To avoid the high cost of resizing when you know you're going to add.. ArrayList. So as far as I understand most Java programmers avoid Vector in favor of ArrayList since they will probably synchronize..
Evaluating a math expression given in string form http://stackoverflow.com/questions/3422673/evaluating-a-math-expression-given-in-string-form String s. Example strings 5 3 or 10 40 or 10 3 I want to avoid a lot of if then else statements. How can I do this java string..
Java GUI listeners without AWT http://stackoverflow.com/questions/6255106/java-gui-listeners-without-awt mis interpreting the information given to you. You should avoid using Swing components with AWT components . It's OK to use..
Should I avoid the use of set(Preferred|Maximum|Minimum)Size methods in Java Swing? http://stackoverflow.com/questions/7229226/should-i-avoid-the-use-of-setpreferredmaximumminimumsize-methods-in-java-swi I avoid the use of set Preferred Maximum Minimum Size methods in Java.. So I have the following questions Should I completely avoid the use of those methods The methods have been defined for a.. share improve this question Should I completely avoid the use of those methods yes for application code The methods..
When exactly is it leak safe to use (anonymous) inner classes? http://stackoverflow.com/questions/10864853/when-exactly-is-it-leak-safe-to-use-anonymous-inner-classes and its entire View tree. Solutions Activities and Views Avoid at all costs making a Static reference to a View or Activity...
Which loop has better performance? Why? http://stackoverflow.com/questions/110083/which-loop-has-better-performance-why scope and same data are used on the stack in both cases. Avoid Premature Initialization The only difference between the two..
http://stackoverflow.com/questions/13497276/jtable-boolean-class and manipulated only on the event dispatch thread . Avoid the use of set Preferred Maximum Minimum Size methods in Java..
Why should the interface for a Java class be prefered? http://stackoverflow.com/questions/147468/why-should-the-interface-for-a-java-class-be-prefered Object list new ArrayList Object The violation was Avoid using implementation types like 'ArrayList' use the interface..
What is the reason for these PMD rules? http://stackoverflow.com/questions/1615419/what-is-the-reason-for-these-pmd-rules to using final parameters and variables LooseCoupling Avoid using implementation types like 'LinkedList' use the interface.. I not declare my variables to be of the strictest sense AvoidSynchronizedAtMethodLevel Use block level rather than method.. synchronization have over method level synchronization AvoidUsingShortType Do not use the short type My first languages were..
What is the difference between bounded wildcard and type parameters? http://stackoverflow.com/questions/1750273/what-is-the-difference-between-bounded-wildcard-and-type-parameters and unreadable. Joshua Bloch emphisize that you should Avoid Bounded Wildcards in Return Types slide 23 . While bounded wildcards..
How to load a jar file at runtime http://stackoverflow.com/questions/194698/how-to-load-a-jar-file-at-runtime extends Runnable runClass clazz.asSubclass Runnable.class Avoid Class.newInstance for it is evil. Constructor extends Runnable..
Why is Class.newInstance() “evil”? http://stackoverflow.com/questions/195321/why-is-class-newinstance-evil Class.newInstance evil this in response to the code sample Avoid Class.newInstance for it is evil. Constructor extends Runnable..
When to use primitive and when reference types in Java http://stackoverflow.com/questions/2509025/when-to-use-primitive-and-when-reference-types-in-java i1 Integer.valueOf 1 Prefer this. Integer i2 new Integer 1 Avoid if not necessary. For more information on the valueOf methods..
Avoiding “!= null” statements in Java? http://stackoverflow.com/questions/271526/avoiding-null-statements-in-java &ldquo null&rdquo statements in Java I work with Java all.. and this is often the case then it's a different story. Avoid using nulls as a response. With methods that return collections..
Difference between a deprecated and a legacy API? http://stackoverflow.com/questions/2873254/difference-between-a-deprecated-and-a-legacy-api from the book where the word deprecated appears Item 7 Avoid finalizers The only methods that claim to guarantee finalization.. method is thread hostile and has been deprecated. Item 73 Avoid thread groups They allow you to apply certain Thread primitives..
Are there best practices for (Java) package organisation? http://stackoverflow.com/questions/3226282/are-there-best-practices-for-java-package-organisation or com.company.product.modue.util etc. Avoid going overboard with structuring IMO avoid separate packaging..
Guidelines on Exception propagation (in Java) http://stackoverflow.com/questions/3551221/guidelines-on-exception-propagation-in-java separate exceptional scenario as a separate exception. Avoid catching exceptions you cannot handle . Pretty obvious but a..
Avoid synchronized(this) in Java? http://stackoverflow.com/questions/442564/avoid-synchronizedthis-in-java synchronized this in Java Whenever a question pops up on SO..
Why do people still use primitive types in Java? http://stackoverflow.com/questions/5199359/why-do-people-still-use-primitive-types-in-java this question In Joshua Bloch's Effective Java Item 5 Avoid creating unnecessary objects he posts the following code example..
http://stackoverflow.com/questions/5568081/regex-replace-all-ignore-case ~ into outText inText.replaceAll i word word.replaceAll ~ Avoid ruining the original capitalization In the above approach however..
http://stackoverflow.com/questions/732034/getting-unixtime-in-java 1000L java unix timestamp share improve this question Avoid the Date object creation w System.currentTimeMillis . A divide..
Run single test from a JUnit class using command-line http://stackoverflow.com/questions/9288107/run-single-test-from-a-junit-class-using-command-line test from a JUnit test class Command Line using JUnit Avoid modifying the test source Avoid using additional tools java.. Command Line using JUnit Avoid modifying the test source Avoid using additional tools java unit testing command line junit..
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