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java Programming Glossary: referenceshttp://stackoverflow.com/questions/148681/unloading-classes-in-java if the Classloader used is garbage collected. This means references to every single class and to the classloader itself need to..
whats the difference between “.equals and ==” http://stackoverflow.com/questions/1643067/whats-the-difference-between-equals-and improve this question In Java always just compares two references for non primitives that is i.e. it tests whether the two operands..
What is a stack overflow error? http://stackoverflow.com/questions/214741/what-is-a-stack-overflow-error types the object lives on the heap and a variable references that object . The stack typically lives at the upper end of..
http://stackoverflow.com/questions/2707322/what-is-null-in-java I was designing the first comprehensive type system for references in an object oriented language ALGOL W . My goal was to ensure.. language ALGOL W . My goal was to ensure that all use of references should be absolutely safe with checking performed automatically..
How to call SOAP web service in Android http://stackoverflow.com/questions/297586/how-to-call-soap-web-service-in-android been able to find are either very convoluted documents and references to kSoap2 and then some bit about parsing it all manually with..
Difference between string object and string literal [duplicate] http://stackoverflow.com/questions/3297867/difference-between-string-object-and-string-literal two different objects are created and they have different references String c new String abc String d new String abc System.out.println..
How to create dynamic JSF 1.2 form fields http://stackoverflow.com/questions/3510614/how-to-create-dynamic-jsf-1-2-form-fields totally different flavor it may still be useful for future references by others I'll add another answer based on a Javabean origin...
How to deal with “java.lang.OutOfMemoryError: Java heap space” error (64MB heap size) http://stackoverflow.com/questions/37335/how-to-deal-with-java-lang-outofmemoryerror-java-heap-space-error-64mb-heap collected languages such as Java or C# is to keep around references to objects that you no longer are using or allocating many objects.. these objects for a reason and you need to keep around references depending on what you are doing this might be the case you will..
http://stackoverflow.com/questions/40480/is-java-pass-by-reference thing can be to understand that Java passes objects as references and those references are passed by value. It goes like this.. that Java passes objects as references and those references are passed by value. It goes like this public void foo Dog d..
Migrating from JSF 1.2 to JSF 2.0 http://stackoverflow.com/questions/4441713/migrating-from-jsf-1-2-to-jsf-2-0 are the JARs and if necessary get rid of all t saveState references on a request scoped bean by making the bean view scoped. share..
Integer wrapper objects share the same instances only within the value 127? http://stackoverflow.com/questions/5117132/integer-wrapper-objects-share-the-same-instances-only-within-the-value-127 allow but not require sharing of some or all of these references. This ensures that in most common cases the behavior will be..
In Java, what is the best way to determine the size of an object? http://stackoverflow.com/questions/52353/in-java-what-is-the-best-way-to-determine-the-size-of-an-object that defines how large primitive types and object references are for a VM Right now I have code that says read up to 32 000..
Creating a memory leak with Java http://stackoverflow.com/questions/6470651/creating-a-memory-leak-with-java make the leak work that much faster. The thread clears all references to the custom class or the ClassLoader it was loaded from. Repeat...
http://stackoverflow.com/questions/7520432/java-vs-equals-confusion true if both variables refer to the same object if their references are one and the same. Always remember to override hashCode if..
Java String.equals versus == [duplicate] http://stackoverflow.com/questions/767372/java-string-equals-versus contents of the string the operator checks whether the references to the objects are equal. Note that string constants are usually..
Difference Between Equals and == http://stackoverflow.com/questions/971954/difference-between-equals-and compare for identity i.e. whether the two values are references to the same object. This is also called reference equality ...
Java comparison with == of two strings is false? http://stackoverflow.com/questions/995918/java-comparison-with-of-two-strings-is-false improve this question The operator compares the object references not the value of the String s. To compare the values of String..
Image resizing and displaying in a JPanel or a JLabel without loss of quality http://stackoverflow.com/questions/12660122/image-resizing-and-displaying-in-a-jpanel-or-a-jlabel-without-loss-of-quality Exception e e.printStackTrace return null return bi References resizing image java getScaledInstance share improve this answer..
When would you use a WeakHashMap or a WeakReference? http://stackoverflow.com/questions/154724/when-would-you-use-a-weakhashmap-or-a-weakreference
http://stackoverflow.com/questions/176745/circular-references-in-java References in Java Given an aggregation of class instances which refer..
What does “Could not find or load main class” mean? http://stackoverflow.com/questions/18093928/what-does-could-not-find-or-load-main-class-mean project references or launcher configurations. Other References From the Tutorial Common Problems and Their Solutions share..
When to use generic methods and when to use wild-card? http://stackoverflow.com/questions/18176594/when-to-use-generic-methods-and-when-to-use-wild-card T super Integer void print List T list Won't compile References Angelika Langer's Java Generics FAQs share improve this answer..
Garbage Collection in Java and Circular References http://stackoverflow.com/questions/1910194/garbage-collection-in-java-and-circular-references Collection in Java and Circular References From my understanding garbage collection in java cleans up..
How do I convert CamelCase into human-readable names in Java? http://stackoverflow.com/questions/2559759/how-do-i-convert-camelcase-into-human-readable-names-in-java behind me non letter in front of me GL11 May5 BFG9000 References regular expressions.info Lookarounds Related questions Using..
Implemeting 2 interfaces in a class with same method.Which interface method is overridden? http://stackoverflow.com/questions/2801878/implemeting-2-interfaces-in-a-class-with-same-method-which-interface-method-is-o may be a tricky task but that's another issue altogether. References JLS 8.4.2 Method Signature JLS 8.4.8 Inheritance Overriding..
What is the difference between a soft reference and a weak reference in Java? http://stackoverflow.com/questions/299659/what-is-the-difference-between-a-soft-reference-and-a-weak-reference-in-java share improve this question From Understanding Weak References by Ethan Nicholas Weak references A weak reference simply put.. weakly reachable the strongest references to it are WeakReferences will be discarded at the next garbage collection cycle but an.. reachable will generally stick around for a while. SoftReferences aren't required to behave any differently than WeakReferences..
What is the difference between “text” and new String(“text”) in Java? http://stackoverflow.com/questions/3052442/what-is-the-difference-between-text-and-new-stringtext-in-java that this is very peculiar and is rarely the intention. References JLS 15.21.3 Reference Equality Operators and class Object boolean..
Validating input using java.util.Scanner http://stackoverflow.com/questions/3059333/validating-input-using-java-util-scanner Related questions Reading a single char in Java References Java Tutorials Essential Classes Regular Expressions regular..
Why does int num = Integer.getInteger(“123”) throw NullPointerException? http://stackoverflow.com/questions/3123349/why-does-int-num-integer-getinteger123-throw-nullpointerexception to int 123 you can use e.g. int Integer.parseInt String . References Java Language Guide Autoboxing Integer API references static..
Multiple wildcards on a generic methods makes Java compiler (and me!) very confused http://stackoverflow.com/questions/3546745/multiple-wildcards-on-a-generic-methods-makes-java-compiler-and-me-very-confu compiler. It is doing exactly what it's supposed to do. References Angelika Langer's Java Generics FAQ Which super subtype relationships..
Why use a prime number in hashCode? http://stackoverflow.com/questions/3613102/why-use-a-prime-number-in-hashcode number 31 used public int hashCode final int prime 31 ... References Here is a good primer on Hashcode and article on how hashing..
How can we match a^n b^n with Java regex? http://stackoverflow.com/questions/3644266/how-can-we-match-an-bn-with-java-regex String.matches to match strings like ab aabb aaabbb etc References perlfaq6 Can I use Perl regular expressions to match balanced..
proper hibernate annotation for byte[] http://stackoverflow.com/questions/3677380/proper-hibernate-annotation-for-byte JDBC driver to do LOBs properly before changing Hibernate. References https forum.hibernate.org viewtopic.php p 2393203 https forum.hibernate.org.. to get the old behavior pre Hibernate 3.5 . References JPA 2.0 Specification Section 2.8 Mapping Defaults for Non Relationship..
http://stackoverflow.com/questions/3847162/java-generics-super-keyword of Number and simply a List Number is too restrictive. References Angelika Langer's Generics FAQs What is a bounded wildcard When..
Can I change my Windows desktop wallpaper programmatically in Java/Groovy? http://stackoverflow.com/questions/4750372/can-i-change-my-windows-desktop-wallpaper-programmatically-in-java-groovy but I think it should work. That API is presumably stable. References Setting Wallpaper Coding4Fun How to determine if a screensaver..
How do I address unchecked cast warnings? http://stackoverflow.com/questions/509076/how-do-i-address-unchecked-cast-warnings method put Object Object belongs to the raw type HashMap. References to generic type HashMap K V should be parameterized. java generics..
document not saving in spring jpa document manager application http://stackoverflow.com/questions/20586865/document-not-saving-in-spring-jpa-document-manager-application NOT NULL DEFAULT CURRENT_TIMESTAMP FOREIGN KEY client_id REFERENCES patients id FOREIGN KEY type_id REFERENCES documenttypes id.. KEY client_id REFERENCES patients id FOREIGN KEY type_id REFERENCES documenttypes id What changes do I make to this code so that..
Foreign key constraints in Android using SQLite? on Delete cascade http://stackoverflow.com/questions/2545558/foreign-key-constraints-in-android-using-sqlite-on-delete-cascade
http://stackoverflow.com/questions/3669883/hibernate-where-do-insertable-false-updatable-false-belong-in-composite-pr 10 PRIMARY KEY country_code code FOREIGN KEY country_code REFERENCES Countries iso_code with org.hibernate.MappingException Repeated..
How to annotate MYSQL autoincrement field with JPA annotations http://stackoverflow.com/questions/4102449/how-to-annotate-mysql-autoincrement-field-with-jpa-annotations FOREIGN KEY `operator_id` REFERENCES `operator` `id` CONSTRAINT `FK_OPERATOR_AUTHORITY_ROLE_authority_role`.. FOREIGN KEY `authority_role_id` REFERENCES `authority_role` `id` Like I said this is something different...
Javamail NTLM Authentication Failure http://stackoverflow.com/questions/4337812/javamail-ntlm-authentication-failure CHILDREN MULTIAPPEND SORT THREAD ORDEREDSUBJECT THREAD REFERENCES IDLE AUTH DIGEST MD5 AUTH NTLM AUTH CRAM MD5 ANNOTATEMORE A0..
http://stackoverflow.com/questions/6134797/jdbc-realm-login-page username groupid CONSTRAINT USER_FK FOREIGN KEY username REFERENCES Login username ON DELETE CASCADE ON UPDATE RESTRICT web.xml..
Hibernate 4: persisting InheritanceType.JOINED discriminator column values http://stackoverflow.com/questions/7988756/hibernate-4-persisting-inheritancetype-joined-discriminator-column-values binary_data BLOB NOT NULL PRIMARY KEY id FOREIGN KEY id REFERENCES Documents id CREATE ExternalDocuments id INTEGER NOT NULL PRIMARY.. id INTEGER NOT NULL PRIMARY KEY id FOREIGN KEY id REFERENCES SystemDocuments id As you can see all the sub tables do is share..
How do you enforce foreign key constraints in SQLite through Java? http://stackoverflow.com/questions/9774923/how-do-you-enforce-foreign-key-constraints-in-sqlite-through-java
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