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java Programming Glossary: supposeWhy 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 Now for the sake of argument suppose this is back in the 1800s before long distance or radio communication...
Sorting a collection of objects http://stackoverflow.com/questions/1206073/sorting-a-collection-of-objects String I can sort it with Collections.sort stringList But suppose I have a Person class public class Person private String name..
Skipping nextLine() after use nextInt() http://stackoverflow.com/questions/13102045/skipping-nextline-after-use-nextint numerical value 3 this is my input enter 1st string here suppose to be stopped and wait for my input but is skipped enter 2nd..
Convert a string representation of a hex dump to a byte array using Java? http://stackoverflow.com/questions/140131/convert-a-string-representation-of-a-hex-dump-to-a-byte-array-using-java But to keep it original I'll phrase it my own way suppose I have a string 00A0BF that I would like interpreted as the..
Java: splitting a comma-separated string but ignoring commas in quotes http://stackoverflow.com/questions/1757065/java-splitting-a-comma-separated-string-but-ignoring-commas-in-quotes How can I do this Seems like a regexp approach fails I suppose I can manually scan and enter a different mode when I see a..
Import package.* vs import package.SpecificType [duplicate] http://stackoverflow.com/questions/187453/import-package-vs-import-package-specifictype a Java import statement bad 8 answers Would it suppose any difference regarding overhead to write an import loading..
What is the point of the class Option[T]? http://stackoverflow.com/questions/2079170/what-is-the-point-of-the-class-optiont case Some person person.display case None Do nothing Now suppose the method getPerson1 returns null then the call made to display..
Is List<Dog> a subclass of List<Animal>? Why aren't Java's generics implicitly polymorphic? http://stackoverflow.com/questions/2745265/is-listdog-a-subclass-of-listanimal-why-arent-javas-generics-implicitly-p the following hierarchy Animal Parent Dog Cat Children So suppose I have a method doSomething List Animal animals . By all the..
What is a raw type and why shouldn't we use it? http://stackoverflow.com/questions/2770321/what-is-a-raw-type-and-why-shouldnt-we-use-it not a compilation error The above code runs just fine but suppose you also have the following for Object o names String name String..
Round a double to 2 decimal places http://stackoverflow.com/questions/2808535/round-a-double-to-2-decimal-places a double to 2 decimal places suppose if the value is 200.3456 it should be formatted to 200.34 or..
How to read XML using XPath in Java http://stackoverflow.com/questions/2811001/how-to-read-xml-using-xpath-in-java id and I get all the child nodes as result and second is suppose I just want to get a specific child node value only xml version..
Creating random numbers with no duplicates http://stackoverflow.com/questions/4040001/creating-random-numbers-with-no-duplicates time and compensating for existing values. So for example suppose you wanted 3 values in the range 0..9. On the first iteration..
when to use StringBuilder in java http://stackoverflow.com/questions/4645020/when-to-use-stringbuilder-in-java to use StringBuilder in java It is supposed to be generally preferable to use a StringBuilder for String.. a threshold what does it depend on the String length i suppose but in which way And finally would you trade the readability..
http://stackoverflow.com/questions/499437/in-java-when-should-i-create-a-checked-exception-and-when-should-it-be-a-runti and when should I make a runtime exception For example suppose I created the following class public class Account private float..
Why can't I define a static method in a Java interface? http://stackoverflow.com/questions/512877/why-cant-i-define-a-static-method-in-a-java-interface version is never used&mdash this is an override . Now suppose we skip the object instance and just start with a subclass...
Can you find all classes in a package using reflection? http://stackoverflow.com/questions/520328/can-you-find-all-classes-in-a-package-using-reflection using reflection A beginner question about reflection I suppose Is it possible to find all classes or interfaces in a given..
Why is super.super.method(); not allowed in Java? http://stackoverflow.com/questions/586363/why-is-super-super-method-not-allowed-in-java within the same method but not your parent's. For example suppose we have a base collection of items a subclass representing a.. be confident that the items it contains are all red. Now suppose we were able to call super.super.add public class NaughtyItems..
How a AST for an object oriented programming language would look like? http://stackoverflow.com/questions/6376662/how-a-ast-for-an-object-oriented-programming-language-would-look-like real AST representation. Does it depends on the language I suppose. How much detail is needed Are those xyzDeclaraction needed..
Stand-alone Java code formatter/beautifier/pretty printer? http://stackoverflow.com/questions/996646/stand-alone-java-code-formatter-beautifier-pretty-printer in a grand unified formatter for many languages. I suppose it might be nice for a solution to have support for languages..
non resizable window border and positioning http://stackoverflow.com/questions/12529200/non-resizable-window-border-and-positioning problems with settings bounds on non resizable containers Suppose you adjust the bounds to look good on your platform. Suppose.. you adjust the bounds to look good on your platform. Suppose the user's platform has a font with different say larger FontMetrics..
Interview : Can we instantiate abstract class? http://stackoverflow.com/questions/13670991/interview-can-we-instantiate-abstract-class SubClass you just need to compile both your classes. Suppose you put those classes in two different files My.java abstract..
Timer & TimerTask versus Thread + sleep in Java http://stackoverflow.com/questions/1453295/timer-timertask-versus-thread-sleep-in-java difference between using Timer versus Thread.sleep . Suppose the current system time is 11 00AM. If we rollback the system..
What's the issue with creating a generic array? [duplicate] http://stackoverflow.com/questions/18581002/whats-the-issue-with-creating-a-generic-array as below public T T getArray int size T arr new T size Suppose this was allowed for the time being. return arr Since the type..
Method has the same erasure as another method in type http://stackoverflow.com/questions/1998544/method-has-the-same-erasure-as-another-method-in-type of why this was not allowed drawn from the JLS. Suppose before generics were introduced to Java I wrote some code like..
I found JPA, or alike, don't encourage DAO pattern http://stackoverflow.com/questions/2100115/i-found-jpa-or-alike-dont-encourage-dao-pattern valid cases though. Another example is much more trivial. Suppose you fire a query to get some entity that has a lazy loading..
Get unicode value of a character http://stackoverflow.com/questions/2220366/get-unicode-value-of-a-character so that I can get Unicode equivalent of any character e.g. Suppose a method getUnicode char c . A call getUnicode '÷' should return..
Populating child dropdownlists in JSP/Servlet http://stackoverflow.com/questions/2263996/populating-child-dropdownlists-in-jsp-servlet child dropdownlists in JSP Servlet Suppose I am having three dropdownlist controls named dd1 dd2 and dd3..
Why doesn't String's hashCode() cache 0? http://stackoverflow.com/questions/2310498/why-doesnt-strings-hashcode-cache-0 about nothing. Here's a way to think about this issue. Suppose you have an application that does nothing but sit around hashing..
http://stackoverflow.com/questions/2723397/java-generics-what-is-pecs super bounded wildcard pecs share improve this question Suppose you have a method that takes as its parameter a collection of..
Read/convert an InputStream to a String http://stackoverflow.com/questions/309424/read-convert-an-inputstream-to-a-string how should you process that object and produce a String Suppose I have an InputStream that contains text data and I want to..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading work Instantiation session variables and multithreading Suppose I have a webserver which holds numerous servlets. For information..
JTable design to synchronize with back-end data-structure http://stackoverflow.com/questions/3590897/jtable-design-to-synchronize-with-back-end-data-structure over I need to validate the data for example from above Suppose the user want's to edit the value 30.1.He should only be allowed..
Why use a prime number in hashCode? http://stackoverflow.com/questions/3613102/why-use-a-prime-number-in-hashcode inserting into to have orthogonal prime factorizations. Suppose there are 8 buckets to insert into. If the number you are using..
Creating random numbers with no duplicates http://stackoverflow.com/questions/4040001/creating-random-numbers-with-no-duplicates one to it. That gets you a result range of 0..9 without 4. Suppose we get 7 that way. On the third iteration you'd generate a number..
What is the best approach for using an Enum as a singleton in Java? http://stackoverflow.com/questions/427902/what-is-the-best-approach-for-using-an-enum-as-a-singleton-in-java java singleton share improve this question Suppose you're binding to something which will use the properties of..
why business logic should be moved out of JSP? http://stackoverflow.com/questions/5818101/why-business-logic-should-be-moved-out-of-jsp clean and separated architecture Simplicity Re usability Suppose tomorrow you need same app running on a desktop app. then you..
Is there a way to refer to the current type with a type variable? http://stackoverflow.com/questions/7354740/is-there-a-way-to-refer-to-the-current-type-with-a-type-variable a way to refer to the current type with a type variable Suppose I'm trying to write a function to return an instance of the..
Is it possible to read from a InputStream with a timeout? http://stackoverflow.com/questions/804951/is-it-possible-to-read-from-a-inputstream-with-a-timeout way of solving this type of problem is to use a Future. Suppose I have the following executor and streams ExecutorService executor..
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