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java Programming Glossary: objectsWhy is Java Vector class considered obsolete or deprecated? http://stackoverflow.com/questions/1386275/why-is-java-vector-class-considered-obsolete-or-deprecated concurrency And if I don't want to manually synchronize objects and just want to use a thread safe collection without needing..
What is the difference between JSF, Servlet and JSP? http://stackoverflow.com/questions/2095397/what-is-the-difference-between-jsf-servlet-and-jsp and handle the response by HttpServletResponse . Both objects are available as method arguments inside any of the overridden.. input validating converting them putting them in model objects invoking actions and rendering the response. This way you end..
Overriding equals and hashCode in Java http://stackoverflow.com/questions/27581/overriding-equals-and-hashcode-in-java and transitive . In addition it must be consistent if the objects are not modified then it must keep returning the same value.. or WeakHashMap make sure that the hashCode of the key objects that you put into the collection never changes while the object..
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 explicitly told the compiler that it is capable of holding objects of any type. While you can pass a List String to a parameter..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading will create new HttpServletRequest and HttpServletResponse objects and pass it through the methods of the already created Filter.. committed and finished then both the request and response objects will be trashed. HttpSession When a client visits the webapp..
How to avoid Java Code in JSP-Files? http://stackoverflow.com/questions/3177733/how-to-avoid-java-code-in-jsp-files are used if necessary to transform data also called value objects returned from processing the client's requests into a proper..
A better Java JSON library? [closed] http://stackoverflow.com/questions/338586/a-better-java-json-library equivalent Java object. Gson can work with arbitrary Java objects including pre existing objects that you do not have source code.. work with arbitrary Java objects including pre existing objects that you do not have source code of. There are a few open source.. There are a few open source projects that can convert Java objects to JSON. However most of them require that you place Java annotations..
Design Patterns web based applications http://stackoverflow.com/questions/3541077/design-patterns-web-based-applications directly with HttpServletRequest and HttpServletResponse objects. You have to gather convert and validate the request parameters.. Context class which in turn wraps the request and response objects and offers several convenience methods delegating to the request.. convenience methods delegating to the request and response objects and pass that as argument into the Action#execute method instead...
http://stackoverflow.com/questions/40480/is-java-pass-by-reference The difficult thing can be to understand that Java passes objects as references and those references are passed by value. It goes..
http://stackoverflow.com/questions/4112686/how-to-use-servlets-and-ajax First you'd like to have a tool to convert between Java objects and JSON strings. There are plenty of them as well see the bottom..
How to: generic array creation http://stackoverflow.com/questions/529085/how-to-generic-array-creation strong typing . GenSet knows explicitly what type of objects it contains i.e. its constructor was explicitly called with.. typing . No type checking is actually done on any of the objects passed as argument. in that case you should write public class..
Java String.equals versus == [duplicate] http://stackoverflow.com/questions/767372/java-string-equals-versus string the operator checks whether the references to the objects are equal. Note that string constants are usually interned such..
http://stackoverflow.com/questions/1074081/hibernate-error-org-hibernate-nonuniqueobjectexception-a-different-object-with was already associated with the session I have two user Objects and while I try to save the object using sessio.save userObj..
How do I remove objects from an array in Java? http://stackoverflow.com/questions/112503/how-do-i-remove-objects-from-an-array-in-java remove objects from an array in Java Given an array of n Objects let's say it is an array of strings and it has the following..
Passing a String by Reference in Java? http://stackoverflow.com/questions/1270760/passing-a-string-by-reference-in-java instead of passed by referenced. I thought Strings were Objects which are always passed by reference so to speak in Java What..
When to use wrapper class and primitive type http://stackoverflow.com/questions/1570416/when-to-use-wrapper-class-and-primitive-type . Another consideration is It can be handy to initialise Objects to null or send null parameters into a method constructor to..
Difference between DTO, VO, POJO, JavaBeans? http://stackoverflow.com/questions/1612334/difference-between-dto-vo-pojo-javabeans some developers view JavaBeans as Plain Old Java Objects that follow specific naming conventions. POJO A Plain Old Java..
Good XMPP Java Libraries for server side? [closed] http://stackoverflow.com/questions/177514/good-xmpp-java-libraries-for-server-side XIFF Haskell hsxmpp Java Echomine Feridian Jabber Stream Objects JSO Smack JavaScript strophe.js xmpp4js Lisp cl xmpp Objective..
What's a good Java API for creating Word documents? [closed] http://stackoverflow.com/questions/203174/whats-a-good-java-api-for-creating-word-documents successfully used OpenOffice.org's Universal Network Objects UNO interface to programmatically generate MS Word compatible..
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 dirty 2184 3596 916 6696 priv dirty 4504 5956 7456 17916 Objects Views 149 ViewRoots 4 AppContexts 13 Activities 0 Assets 4 AssetManagers..
Why can Java Collections not directly store Primitives types? http://stackoverflow.com/questions/2504959/why-can-java-collections-not-directly-store-primitives-types store Primitives types Java collections only store Objects not primitive types however we can store the wrapper classes... It was a Java design decision mistake . Containers want Objects and primitives don't derive from Object. Generics allow you..
What is the memory consumption of an object in Java? http://stackoverflow.com/questions/258120/what-is-the-memory-consumption-of-an-object-in-java gives the same answers. It might allocate some temporary Objects on the stack. It may optimize some variables or method calls..
http://stackoverflow.com/questions/3117429/garbage-collector-in-android and you have enough memory to create Bitmaps. If creating Objects I think System.gc will be called automatically if needed but..
A better Java JSON library? [closed] http://stackoverflow.com/questions/338586/a-better-java-json-library Gson is a Java library that can be used to convert Java Objects into its JSON representation. It can also be used to convert..
Differences between HashMap and Hashtable? http://stackoverflow.com/questions/40471/differences-between-hashmap-and-hashtable better for non threaded applications as unsynchronized Objects typically perform better than synchronized ones. Hashtable does..
How to return multiple objects from a Java method? http://stackoverflow.com/questions/457629/how-to-return-multiple-objects-from-a-java-method ways I can think of are return a HashMap since the two Objects are related or return an ArrayList of Object objects. To be.. separated names of the same. I want to return these two Objects from one method because I dont want to iterate through the list..
How to parse XML using the SAX parser http://stackoverflow.com/questions/4827344/how-to-parse-xml-using-the-sax-parser In any case I would work with POJOs Plain Old Java Objects which would hold your data. Here would be the POJOs needed...
What is the difference between an int and an Integer in Java and C#? http://stackoverflow.com/questions/564/what-is-the-difference-between-an-int-and-an-integer-in-java-and-c beyond the scope of this question but to summarize Objects provide facilities for polymorphism are passed by reference..
Does calling clone() on an array also clone its contents? http://stackoverflow.com/questions/5821851/does-calling-clone-on-an-array-also-clone-its-contents clone its contents If I invoke clone method on array of Objects of type A how will it clone its elements Will the copy be referencing..
Java inner class and static nested class http://stackoverflow.com/questions/70324/java-inner-class-and-static-nested-class nestedObject new OuterClass.StaticNestedClass Objects that are instances of an inner class exist within an instance..
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