¡@

Home 

java Programming Glossary: collection

Why is Java Vector class considered obsolete or deprecated?

http://stackoverflow.com/questions/1386275/why-is-java-vector-class-considered-obsolete-or-deprecated

synchronize objects and just want to use a thread safe collection without needing to make fresh copies of the underlying array.. need to take out a lock to avoid anyone else changing the collection at the same time which would cause a ConcurrentModificationException.. situations. As MrSpandex pointed out you can decorate a collection using the calls such as Collections.synchronizedList the fact..

Converting JSON to Java

http://stackoverflow.com/questions/1688099/converting-json-to-java

The in JSON represents an array and should map to a Java collection such as List or just a plain Java array. The in JSON represents..

Sorting an ArrayList of Contacts based on name? [duplicate]

http://stackoverflow.com/questions/1814095/sorting-an-arraylist-of-contacts-based-on-name

based on name duplicate Possible Duplicate Sorting a collection of objects Ok so I have a been making an addressbook application.. mobile number and address. So I was looking into using the collection sort yet am not sure how i'd implement this. Is this the right.. or should I look into making a custom sort java sorting collections arraylist share improve this question Here's a tutorial..

Efficient equivalent for removing elements while iterating the Collection

http://stackoverflow.com/questions/223918/efficient-equivalent-for-removing-elements-while-iterating-the-collection

an ArrayList so you can't rely on get . java algorithm collections share improve this question Iterator.remove is safe. Note.. Note that Iterator.remove is the only safe way to modify a collection during iteration the behavior is unspecified if the underlying.. iteration the behavior is unspecified if the underlying collection is modified in any other way while the iteration is in progress...

Java Generics: What is PECS?

http://stackoverflow.com/questions/2723397/java-generics-what-is-pecs

Suppose you have a method that takes as its parameter a collection of things but you want it to be more flexible than just accepting.. a Collection Thing . Case 1 You want to go through the collection and do things with each item. Then the list is a producer so.. cannot know at runtime which specific subtype of Thing the collection holds. Case 2 You want to add things to the collection. Then..

Overriding equals and hashCode in Java

http://stackoverflow.com/questions/27581/overriding-equals-and-hashcode-in-java

that the hashCode of the key objects that you put into the collection never changes while the object is in the collection. The bulletproof.. the collection never changes while the object is in the collection. The bulletproof way to ensure this is to make your keys immutable..

Why is super.super.method(); not allowed in Java?

http://stackoverflow.com/questions/586363/why-is-super-super-method-not-allowed-in-java

but not your parent's. For example suppose we have a base collection of items a subclass representing a collection of red items and.. have a base collection of items a subclass representing a collection of red items and a subclass of that representing a collection.. of red items and a subclass of that representing a collection of big red items . It makes sense to have public class Items..

Remove Top-Level Container on Runtime

http://stackoverflow.com/questions/6309407/remove-top-level-container-on-runtime

the example below with jvisualvm one can see that periodic collection never quite returns to baseline. I've exaggerated the vertical..

Why is char[] preferred over String for passwords?

http://stackoverflow.com/questions/8881291/why-is-char-preferred-over-string-for-passwords

be present anywhere in the system even before garbage collection. So yes this is a security concern but even using char only..

Efficiency of Java “Double Brace Initialization”?

http://stackoverflow.com/questions/924285/efficiency-of-java-double-brace-initialization

for measuring that . @Thilo pointed out that garbage collection can be affected and the memory cost for the extra loaded classes..

Reasons of getting a java.lang.VerifyError

http://stackoverflow.com/questions/100107/reasons-of-getting-a-java-lang-verifyerror

method getMonthData signature IILjava util Collection Ljava util Collection Ljava util HashMap Ljava util Collection.. getMonthData signature IILjava util Collection Ljava util Collection Ljava util HashMap Ljava util Collection Ljava util Locale Lorg.. Ljava util Collection Ljava util HashMap Ljava util Collection Ljava util Locale Lorg apache struts util MessageRe ´Mt ´M šw..

Efficient equivalent for removing elements while iterating the Collection

http://stackoverflow.com/questions/223918/efficient-equivalent-for-removing-elements-while-iterating-the-collection

equivalent for removing elements while iterating the Collection We all know you can't do this for Object i l if condition i.. some specific code public static void main String args Collection Integer l new ArrayList Integer for int i 0 i 10 i l.add new.. you can't always have both I'm also using an arbitrary Collection here not necessarily an ArrayList so you can't rely on get ...

Java Generics: What is PECS?

http://stackoverflow.com/questions/2723397/java-generics-what-is-pecs

but you want it to be more flexible than just accepting a Collection Thing . Case 1 You want to go through the collection and do.. each item. Then the list is a producer so you should use a Collection extends Thing . The reasoning is that a Collection extends Thing.. use a Collection extends Thing . The reasoning is that a Collection extends Thing could hold any subtype of Thing and thus each..

Overriding equals and hashCode in Java

http://stackoverflow.com/questions/27581/overriding-equals-and-hashcode-in-java

rhs.age . isEquals Also remember When using a hash based Collection or Map such as HashSet LinkedHashSet HashMap Hashtable or WeakHashMap..

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

JTable duplicate values in row

http://stackoverflow.com/questions/9132987/jtable-duplicate-values-in-row

app to ever use serialized classes. EVER. public class CollectionDataModel extends AbstractTableModel private ArrayList ArrayList.. private ArrayList ArrayList String data public CollectionDataModel data new ArrayList ArrayList String @Override public.. data.get rowIndex .get columnIndex public void populate Collection c data.clear for Item i c.getItems ArrayList String row new..

Efficiency of Java “Double Brace Initialization”?

http://stackoverflow.com/questions/924285/efficiency-of-java-double-brace-initialization

the same effect with Arrays.asList varargs methods Google Collections and the proposed Java 7 Collection literals. Newer JVM languages.. varargs methods Google Collections and the proposed Java 7 Collection literals. Newer JVM languages like Scala JRuby and Groovy also.. anonymous inner class . As an added note if Joshua Bloch's Collection Literals proposal for Project Coin goes through we may be able..