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1. Top results related to what are the function of dictionary in java language

   • What are the uses of inner classes in Java? Are nested classes and inner classes the same?

     Top Answer

     Answered Jun 20, 2020 · 13 votes

     No, they're not the same: an inner class is non-static.

     JLS 8.1.3 Inner Classes and Enclosing Instances

     An inner class is a nested class that is not explicitly or implicitly declared static.

     Consult also the following diagram from Joe Darcy:

     Joseph D. Darcy's Oracle Weblog - Nested, Inner, Member, and Top-Level Classes

     Related questions

     • Java inner class and static nested class

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     1/5

   • What are the benefits of the Iterator interface in Java?

     Top Answer

     Answered Sep 18, 2008 · 18 votes

     Why is this interface used?

     Because it supports the basic operations that would allow a client programmer to iterate over any kind of collection (note: not necessarily a Collection in the Object sense).

     Why are the methods... not directly coded to the data structure implementation itself?

     They are, they're just marked Private so you can't reach into them and muck with them. More specifically:

     • You can implement or subclass an Iterator such that it does something the standard ones don't do, without having to alter the actual object it iterates over.
     • Objects that can be traversed over don't need to have their interfaces cluttered up with traversal methods, in particular any highly specialized methods.
     • You can hand out Iterators to however many clients you wish, and each client may traverse in their own time, at their own speed.
     • Java Iterators from the java.util package in particular will throw an exception if the storage that backs them is modified while you still have an Iterator out. This exception lets you know that the Iterator may now be returning invalid objects.

     For simple programs, none of this probably seems worthwhile. The kind of complexity that makes them useful will come up on you quickly, though.

     Other Answers

     Answered Jun 20, 2020 · 6 votes

     You ask: "Why are the methods hasNext(), next() and remove() not directly coded to the data structure implementation itself?".

     The Java Collections framework chooses to define the Iterator interface as externalized to the collection itself. Normally, since every Java collection implements the Iterable interface, a Java program will call iterator to create its own iterator so that it can be used in a loop. As others have pointed out, Java 5 allows us to direct usage of the iterator, with a for-each loop.

     Externalizing the iterator to its collection allows the client to control how one iterates through a collection. One use case that I can think of where this is useful is when one has an an unbounded collection such as all the web pages on the Internet to index.

     In the classic GoF book, the contrast between internal and external iterators is spelled out quite clearly.

     A fundamental issue is deciding which party conrols the iteration, the iterator or the client that uses the iterator. When the client controls the iteration, the iterator is called an external iterator, and when the iterator controls it, the iterator is an internal iterator. Clients that use an external iterator must advance the traversal and request the next element explicitly from the iterator. In contrast, the client hands an internal iterator an operation to perform, and the iterator applies that operation to every element ....

     External iterators are more flexible than internal iterators. It's easy to compare two collections for equality with an external iterator, for example, but it's practically impossible with internal iterators ... But on the other hand, internal iterators are easier to use, because they define the iteration logic for you.

     For an example of how internal iterators work, see Ruby's Enumerable API, which has internal iteration methods such as each. In Ruby, the idea is to pass a block of code (i.e. a closure) to an internal iterator so that a collection can take care of its own iteration.

     Other Answers

     Answered Oct 07, 2008 · 5 votes

     it is important to keep the collection apart from the pointer. the iterator points at a specific place in a collection, and thus is not an integral part of the collection. this way, for an instance, you can use several iterators over the same collection.

     the down-side of this seperation is that the iterator is not aware to changes made to the collection it iterates on. so you cannot change the collection's structure and expect the iterator to continue it's work without "complaints".

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     2/5

   • What are the drawbacks of enums in Java?

     Top Answer

     Answered Jul 16, 2019 · 5 votes

     One possible answer is that enums were introduced in Java 1.5. While this seems like ancient history, some libraries still use string constants or numeric constants for compatibility reasons.

     Another possible answer is that those are not really semantically enum elements, but constants used by an external interface and are only ever accessed via their string value. In such cases, using enums and calling name() each time would be redundant.

     Other than that, you should never use enums over string constants in such cases.

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     3/5

   • What are the default values of the char array in Java?

     Top Answer

     Answered Feb 25, 2016 · 14 votes

     It's the same as for any type: the default value for that type. (So the same as you'd get in a field which isn't specifically initialized.)

     The default values are specified in JLS 4.12.5:

     For type char, the default value is the null character, that is, '\u0000'.

     Having said that, it sounds like really you want a List<Character>, which can keep track of the actual size of the collection. If you need random access to the list (for example, you want to be able to populate element 25 even if you haven't populated element 2) then you could consider:

     • A Character[] using null as the "not set" value instead of '\u0000' (which is, after all, still a character...)
     • A Map<Integer, Character>
     • Sticking with char[] if you know you'll never, ever, ever want to consider an element with value '\u0000' as "set"

     (It's hard to know which of these is the most appropriate without knowing more about what you're doing.)

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     4/5

   • What are the equivalent of the following .NET concepts (ASP.NET, IIS, Linq, etc.) in Java world?

     Top Answer

     Answered May 11, 2010 · 13 votes

     Javaland is a pretty big ecosystem. There is plethora of tools and framework to choose from and combine.

     There are also popular combo like Tomcat/Spring/Hibernate, but there are of course other.

     • Many IDE available: Eclipse, NetBeans, JDevelopper, ...
     • Web container, or application server: Tomcat, Glassfish, Jetty, WebLogic, ...
     • Some third-party libraries mimic Linq, but it's not widely popular
     • ?
     • Several ORM available: JPA (specification), Hibernate, EclipseLink, TopLink, ...
     • Several component-based web framework: JSF, Wicket, ...
     • Several action-based web framework: Spring MVC, Struts (old school), ...

     And I would add:

     • Build tools: Ant, Mavan
     • Version control: SVN, Git
     • Documentation: Javadoc
     • Issue trackers: JIRA, ...
     • Collaboration: Eclipse Mylin

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2. www.geeksforgeeks.org › functions-programmingFunctions in Programming - GeeksforGeeks

   www.geeksforgeeks.org › functions-programming

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   3 days ago · Functions in Programming enable the reuse of code by encapsulating a specific functionality. Once a function is defined, it can be called multiple times from different parts of the program, reducing redundancy and promoting efficient code maintenance. Functions can be called multiple times, reducing code duplication. C++ Java Python3 JavaScript.

3. pwskills.com › blog › core-java-syllabusCore Java Syllabus and Advanced Java Concepts - pwskills.com

   pwskills.com › blog › core-java-syllabus

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   3 days ago · Core Java Syllabus: The term “Core” signifies the fundamental essence of a concept, and in this context, ‘Core Java’ embodies the foundational aspects of the Java programming language. As a widely recognized and extensively utilized programming language, Java is the starting point for beginners, with Core Java laying the groundwork ...

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   Core Java Syllabus and Advanced Java Concepts - pwskills.com

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   Why is vocabulary important in language education?

   • In the context of education, vocabulary refers to the body of words, including their meanings and use, that a student learns and uses. Vocabulary acquisition is a central aspect of language education, as it directly impacts reading comprehension, expressive and receptive language skills, and academic achievement.

   Vocabulary - Wikipedia

   en.wikipedia.org/wiki/Vocabulary

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   What is a function definition?

   • The function definition contains a function declaration and the body of a function. The body is a block of statements that perform the work of the function. The identifiers declared in this example allocate storage; they are both declarations and definitions. Once a function is declared, it can be used or “called” by its name.

   Functions in Programming - GeeksforGeeks

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5. www.geeksforgeeks.org › strings-in-javaStrings in Java - GeeksforGeeks

   www.geeksforgeeks.org › strings-in-java

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   3 days ago · Ways of Creating a String. There are two ways to create a string in Java: String Literal. Using new Keyword. Syntax: <String_Type> <string_variable> = "<sequence_of_string>"; . 1. String literal. To make Java more memory efficient (because no new objects are created if it exists already in the string constant pool).

6. stackoverflow.com › questions › 78405623Convert `(String, Int)...` variadic parameter function to ...

   stackoverflow.com › questions › 78405623

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   4 days ago · But this doesn't work for the Dictionary. The existing initializer is expecting a [String : Int] dictionary, but the ExpressibleByDictionaryLiteral function parameter is a (String, Int)... Why do these "expressible by Array/Dictionary literal" give you a variadic parameter in the first place, rather than an array/dictionary?

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8. pwskills.com › blog › java-tutorialJava Tutorial For Complete Beginners - pwskills.com

   pwskills.com › blog › java-tutorial

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   3 days ago · Our Java Tutorial for Complete Beginners provides learners with completely organised and simple-to-understand Java development courses. Java is a widely used programming language preferred by most developers around the world. Java is a platform-independent, statically typed, and Object-oriented programming language used for software development ...

9. stackoverflow.com › questions › 78422006Android Studio API Help (JAVA) Dictionary Application

   stackoverflow.com › questions › 78422006

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   1 day ago · I've been working on an Android app that fetches definitions from the Oxford Dictionaries API, but I'm encountering an issue where the definitions aren't loading. I've verified that my API credenti...

10. en.wikipedia.org › wiki › VocabularyVocabulary - Wikipedia

    en.wikipedia.org › wiki › Vocabulary

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    Vocabulary acquisition is a central aspect of language education, as it directly impacts reading comprehension, expressive and receptive language skills, and academic achievement. Vocabulary is examined in psychology as a measure of language processing and cognitive development.