1. Returning flags from enums java-forums.orgPerhaps your Rotation enum could hold an ArrayList of MirrorFlags as an instance field, and each Rotation could create list in its constructor. Then it can have a method that returns this list. Regarding your second question, no there is no internal method for this (it should be obvious since this isn't an intrinsic property of enum but rather an intrinsic ... |
2. Struggling with enum! java-forums.org |
3. Enum confusion java-forums.orgimport java.util.Map; import java.util.TreeMap; public enum Day2 { //Day2 enums use the Day2 constructor for String types. DAY1STRING1("Open"), DAY1STRING2("Closed"), DAY1STRING3("Cancelled"), DAY1STRING4("Reversed"), DAY2DOUBLE1(2.2), DAY2DOUBLE2(5.0); public static Map |
4. Enums taking in enums? java-forums.org |
5. Learning enum java-forums.orgJava Code: C:\Program\Java\jdk1.7.0\jre\classes\pjjava\nbie\Family.java:5: error: illegal start of type FATHER {56}, ^ C:\Program\Java\jdk1.7.0\jre\classes\pjjava\nbie\Family.java:5: error: ';' expected FATHER {56}, ^ C:\Program\Java\jdk1.7.0\jre\classes\pjjava\nbie\Family.java:5: error: illegal start of type FATHER {56}, ^ C:\Program\Java\jdk1.7.0\jre\classes\pjjava\nbie\Family.java:6: error: ';' expected MOTHER {52}, ^ C:\Program\Java\jdk1.7.0\jre\classes\pjjava\nbie\Family.java:6: error: not a statement MOTHER {52}, ^ C:\Program\Java\jdk1.7.0\jre\classes\pjjava\nbie\Family.java:6: error: ';' expected MOTHER {52}, ^ C:\Program\Java\jdk1.7.0\jre\classes\pjjava\nbie\Family.java:6: error: illegal start of type MOTHER {52}, ^ C:\Program\Java\jdk1.7.0\jre\classes\pjjava\nbie\Family.java:6: error: ';' ... |
6. Copy construtor with enums - java-forums.org |
7. Enum Question forums.oracle.com |
8. string combinations: is there an easy way to generate using java.util.enum forums.oracle.com |
9. About enums forums.oracle.comI got the ans.. Static means one per class. means it is related to class member so nested classes are member of inclosing class so it is allowed, thas why it is not allowed for non-inner classes if it is right please reply me other wise i am having wrong concept in my mind. |
10. Abstract enums. forums.oracle.comHi All, I was trying to create an abstract enum within a java class using Eclipse IDE, but as soon as I specify abstract keyword before enum declaration, the compiler complains saying that 'Only public, private, protected, static & abstract are allowed.' If abstract is allowed, why is this error coming up then? Any code snippet of abstract enum if you ... |
11. enum validation forums.oracle.comWell, if you type in "PC", then input is not "Wii", so that goes as "true" and hence you enter the while. Your logic is faulty. Try AND, not OR - it's supposed to be neither of those values. Or just negate the unnegated ORs combined. I don't see any enum there by the way. |
12. What's the best way to use an enum to validate statuses forums.oracle.com |
13. Enum question forums.oracle.comThe assignment is to write a tokenizer. It will read in word by word and then an integer value is assigned to each respective word/letter based on what kinda it is. Reserved words are given integer values 1-10; Special symbols are given the value 11-29; Integers (no matter the value) are given the value 30 and Identifiers are given the value ... |
14. Using enum to validate tokens in a string forums.oracle.comHi, My java expereince is limited, however I want to make use of enums when tokenising. e.g. enum Tokens { LeftBracket("("), RightBracket(")"), Open("Open"), Close("Close"), End("."), More("/"), Quote("\""); private String token Token (String s) this.token = s; } What I want to do is add a method where I present a String e.g. "End", my Token is scanned and the token variable ... |
15. Enums forums.oracle.comimport java.util.*; enum OperatingSystems { windows, unix, linux, macintosh } public class NewClass { public static void main(String args[]) { OperatingSystems os; os = OperatingSystems.windows; switch(os) { case windows: System.out.println("You chose Windows!"); break; case unix: System.out.println("You chose Unix!"); break; case linux: System.out.println("You chose Linux!"); break; case macintosh: System.out.println("You chose Macintosh!"); break; default: System.out.println("I don't know your OS."); break; } } } ... |
16. Enum multiple choice question forums.oracle.com |
17. trying to understan how to use enums forums.oracle.com |
18. Implement enum in java forums.oracle.com |
19. enums in public enum forums.oracle.com |
20. Enums - Deck/Display Deck forums.oracle.com |
21. Trying to use Enum forums.oracle.comFor my java class I need to create an enumeration called TaxBracket. Using Eclipse and JDK 6 I try and create a file by right clicking on the project name in Eclipse and selecting NEW --> ENUM. When I try to give it a name it says "Project HW4 is not a JDK 5.0 compliant project". I have JDK 6 why ... |
22. Quick enum question forums.oracle.com |
23. enum and restrictions forums.oracle.comHi, Could anybody tell me what are the underlying reasons of not letting clone enums (and what has got in common with special handling of serialization I believe ...) ? I know that it would break the singleton design pattern, but why is it so important ? What would the risk be ? Any examples ? Thanks, Adrian |
24. enum and modifiers forums.oracle.com |
25. am I explaining this enum right? forums.oracle.com |
26. Question about scope in the enum example in the Java Tutorial forums.oracle.com |
27. enum in JDK 1.5.07 forums.oracle.comelse { NUM_INFO ni = Enum.valueOf( NUM_INFO.class, argv[0].toUpperCase()); System.out.println( "Char : " + ni.getNumChar() + "\n" + "Value: " + ni.getNumValue() ); System.out.println("Name of the Num Info : " + ni.name()); } } } enum NUM_INFO { ONE ('1', 1.0/6.0), TWO ('2', -2.0/6.0), THREE ('3', 3.0/6.0), FOUR ('4', -4.0/6.0), FIVE ('5', 5.0/6.0), SIX ('6', -6.0/6.0); |
28. What is enum used for? forums.oracle.comHi folks, Happy new year one and all. I'm teaching my self Java out of a book at the moment, and the author has dropped enum out of nowhere with no explanation as to what it is and how it's used. From what I gather, it seems to be some sort of collection of some sort, to store a bunch of ... |
29. A small doubt regarding Enums.... forums.oracle.com |
30. cant get enum to work for java 6 - what am i doing stupid forums.oracle.comtrying to define an enum inside a class as this public class Keyboard { enum SpecialCharacters {EoF} ... however the eclipse editor on java 6 come back with "enum could not be resolved to a type". if i save the enum def in its own java file that doesnt work either. must be doing something stupid - can any one put ... |
31. semicolon exptected while use enum forums.oracle.comIt iwas weird, after i used BlueJ and chose the same VM, the code can run as usuall. Anyone can give me clue why in my cygwin and command line cannot running this code. I have the same problem while i try to use the Collection-Based for Loop Hope someone can help me |
32. A default enum forums.oracle.com |
33. import enum forums.oracle.comYou can't import anything from the default package (and you don't need to) so both of your (outer) classes have to be in a package if you want to import them. If you use different pacakages the class and the enum have to have public access.. kind regards, Jos edit: and make that A.Proof instead of just Proof in your other ... |
34. using enums forums.oracle.com |
35. enum code forums.oracle.comit turns out that the reason i had a problem is because the book explained how to put two classes in code with creator so the code was not expected to run with out putting in the second class (enum) as i had not done that before i could not execute the program until i had read the next chapter. unfortunately ... |
36. I can't import enums for some reason forums.oracle.comIn a class I made, I can't seem to import an enum. Eclipse tells me "The import de.game.ground.Constants.Board cannot be resolved." Board is the name of my enum sitting in the class Constants. What's so weird is that other classes have imported the enum and are using it just fine. But for some reason this one class won't. These classes are ... |
37. Getting my head around enum forums.oracle.comI'm trying to understand all of the features available using java's enum. I understand everything about enums as long as they are simple enumerated lists. However when constructors, methods, and instance variables are thrown into the mix, I loss the ability to make sense of what an enum really is and what it does. I'm reading the following article, but I ... |
38. Enum Style Question forums.oracle.comI tried googling this but haven't found the answer. In my application, a game, I've set up a couple of enums. The first is for the menu EASY, MEDIUM, HARD. Mulitple classes use it for animation speed etc. I like it much better than passing an int or char because makes the code very readable. |
39. ENUMS forums.oracle.comI have a few quick questions about using ENUMs - and why they are so good? After having read the documentation on them on sun.com, and my own textbook notes, I'm still not entirely clear about using them. I know you should use them when you have a fixed set of constants (such as days of the week, status' for something). ... |
40. Enum Question forums.oracle.com |
41. Enums forums.oracle.comAn enum basically defines a class with a fixed number of instances that can be accessed statically. Enums are NOT represented in any way as ints, nor are they indexed in any retrievable way. However, as enums can have fields, methods and constructors just like regular classes, it's easy enough to define a method that returns whatever int you want. BTW, ... |
42. Enum question forums.oracle.comNo, I agree, but the bad design I think lies in how I'm passing the Enum now. I don't know, I guess what I'm asking is it possible to pass just an Enum as a whole to an entirely different object without creating a needless instance of it? Like what I really want is to call doSomething like this: doSomething(UserStatus); Obviously, ... |
43. Enum Question forums.oracle.comIt's almost always better to keep information in as specific a type as you can. So for a whole number of inches, use an int rather than a string. For two such numbers, you can use two ints, or - in this specific case - you know the max is one less than the min of the next, you could iterate ... |
44. cannot use enums forums.oracle.compublic String toString() { if (value > 1 && value < 11) return String.valueOf(value); else if (value == 1) return "Ace"; else if (value == 11) return "Jack"; else if (value == 12) return "Queen"; else if (value == 13) return "King"; else return "error"; } public int value() { return value % 13 + 1; } } |
45. Enum to return Enum forums.oracle.comIt is possible, but IMO, a bad design. Enums are good for discrete states. However, if you find yourself maintaining things like graphs or trees or associations, you probably would be better off modelling these at an abstract level (e.g., Domain, Action, etc. in your examples) and moving the associations (which actions allowed for a domain) to external configuration such as ... |
46. enum - core java II example forums.oracle.com |
47. Enum misuse when used to implement interpreted language procedures? forums.oracle.comI don't consider it a misuse at all. An enum is simply a class with a known, fixed, named set of instances that exist as long as the class exists. Enums were specifically designed to allow this kind of functionality. If there's any abuse going on, you could say it's enum's design encouraging such different behaviors by instance rather than by ... |
48. enum lookup by multiple strings forums.oracle.com |
49. How to replace my enum implementation with something more efficient! forums.oracle.comTo reduce the footprint, take advantage of I/O streams. Don't read everything into a collection. Read in one record at a time, transform or permute it or store it or transmit it or whatever you are doing, and then read the next one. If you need to summarize the records, only store the summary information (e.g., count, sum, standard deviation, whatever). ... |
50. Enum forums.oracle.com |
51. Using ENUM with FLAGS in java forums.oracle.com |
52. Enum forums.oracle.comThey are basically double values of a more complicated Object and belong to a class. I have 10 instances of a class like: Currency class, Region class, and these double refer to some value in this class; where I have to display these values in one row in a report so I used an Array to keep all these values ... |
53. getting an Enum[]? forums.oracle.com |
54. enum can be local? forums.oracle.comThankyou prometheuzz for your kind reply. But I am little confused. Implicitly static means In what sense? Is that implicitly static to some other class or it is a static declaration? If we say that we can't declare a static class or variable means we must use the KeyWord "static" right? but I am just declaring simply as enum. Did I ... |
55. Quick enum question forums.oracle.comJust one possible "style" issue... same as putting "normal" constants in interfaces... All classes which implement that interface inheret the constants. If that makes to you in your circumstances then go-for-it... If it really doesn't then consider removing the constants to a dedicated class. There is no correct answer, both approachs have there adds and disadds. |
56. Enums - a good way to hold configuration data forums.oracle.com |
57. enums forums.oracle.com |
58. Difference between java.lang.Enum && enum forums.oracle.com |
59. Design Question enums etc forums.oracle.comOk. So I have a class that represents a symbol. A symbol can have many values associated with it e.g name, description, type etc I have a BaseSymbol which contains a map, which I'm intending to use to store the values associated with a symbol ( as above ) rather than having explicit fields associated with the symbol. So BaseSymbol implements ... |
60. Embedding a displayable form in enums? forums.oracle.comAlternatively you can override toString(), either globally or in individual values. In general you should use name() to get the format name, toString() for the human readable form. Overriding toString is convenient when, for example, you use the enum as the basis of a JComboBox or the like where toString() is called implicitly. |
61. enum forums.oracle.com |
62. enum not recognized... forums.oracle.com |
63. enums programs are not executing....? forums.oracle.com |
64. How to create and use enum forums.oracle.compublic enum enumRequest { REQUEST1 (1), REQUEST2 (2), REQUEST3 (3); private final int state; enumRequest (Integer state) {this.state=state);} public GetState() { return this.state;} }; // Constructor RequestHandler() { enumRequest request; } } i am getting an error: "enumRequest cannot be resolved to a type" i am using java 1.5 compiler, can anyone help? 10x. |
65. Enum not initialized forums.oracle.com |
66. enums forums.oracle.compublic Card next() { return get(card++); } public Card dealCard() { // Deals one card from the deck and returns it. if (card == 52) shuffle(); cardsUsed++; return deck[cardsUsed - 1]; } public String toString() { String t = ""; for (int i = 0; i < 52; i++) if ( (i + 1) % 5 == 0) t = t ... |
67. can i work on enums with java 1.6? forums.oracle.comenum ShirtSize {SMALL,MEDIUM,LARGE} class Shir { ShirtSize shirt; } public class TestShirt { public static void main(String[] a) { Shir s=new Shir(); s.size=Shir.ShirtSize.small; System.out.println(s.size); } } while compilation i got as class or interface expected. i tried in other way also in which enum can be placed inside the class Shir then i got error as ';' expected......... |
68. Enums forums.oracle.com |
69. Enum help forums.oracle.com |
70. enum in JDK1.5 vs JDK1.4 forums.oracle.com |
71. why enum?? forums.oracle.com |
72. Help: a question about the Enum...... forums.oracle.com |
73. can i implement enum forums.oracle.comi have a class where i defined a class which have an enum and i want other application to use that enum. But that application wants to have more enums than i defined. can anyone please give me a suggestion on how to resolve this issue. i want to implement in sucah a way that othet applciaiton can extend or implement ... |
74. Working with enums forums.oracle.comAlso, now let's say I save this enum to the database but I save it by it's ID, not it's string value. Then later when I read from the database I want to instantiate the right enum type for the IDs I read, how do I do that? Same thing as above, iterate though all of them and compare the next ... |
75. ExceptionInInitializerError in Initializing enum forums.oracle.comreturn null; } } ================================ Although this is not a pressing issue as the workaround achieves the same result, I would be interested to know if this is a bug or if there are some restriction on the use of Class.forName that I am not aware of. Thanks in advance for your help with this. Reg |
76. Sort by using enums forums.oracle.comA lot her depends on how all of your data is structured, and in fact, I think that this is the key. There are probably 100 ways to do something like this, but one way I can think of off the top of my head is: 1) I'd have a Genre enum that lists the various possible genres (i.e., ACTION, COMEDY, ... |
77. Dynamically create an enum forums.oracle.comI was trying to read in a list of values from a config file and then use these values in an if statement. The idea being that if the values are changed in the config file I wont have to change my code.. That's all very well, but how do you intend to establish the connection between the values, and the ... |
78. Defining Enums forums.oracle.comHi all, In my code I have couple of places where i am using static int codes. Now I want to use Enums there. The question I am facing is to define each in their seperate file or define them as public inside the class which is using it. For example I have a class SQLUtil.java which has: public static final ... |
79. Java 6 doesn't enum forums.oracle.com |
80. Java 6 doesn't accept enum any more? forums.oracle.com |
81. Is there any way to supress Enum in jdk 1.5 forums.oracle.comOur application needs to upgrade from jdk.14 to jdk.15. The appl. doesn't automatically compile in jdk1.5 as enum has become a keyword now, whereas we have been using enum as a variable , package name extensively in our application. Is there any way to suppress enum in jd1.5, like the way assert can be suppressed in jdk1.4 |
82. Enum in Java forums.oracle.com |
83. public enums Java 5 forums.oracle.comEnums are translated to regular classes so CoffeeSize can't be public in the same file as another public class for the same reason that you can't have two public classes in the same file. Nowhere in that comment does it say that it can be public, only that it can't be private or protected. Message was edited by: dwg |
84. Beef with Enums forums.oracle.comThe issue here is not whether or not I've found the best possible solution to my problem, it's whether or not enumerated types are compatible with interfaces in a meaningful way. If people have found meaningful ways of using interfaces in conjunction with enumerated types, I would like to hear about them, as all the solutions I've found feel ugly. |
85. Question Enum forums.oracle.com |
86. Regarding Enum forums.oracle.com |
87. What's the purpose of an Enum? forums.oracle.comToo slow. Though I'll add: enum is basically a language feature implementing the "typesafe enum" pattern. (Or, arguably, it's more of an idiom than a pattern, but whatever.) The book Effective Java by Joshua Bloch describes the typesafe enum pattern and why you'd want to use it, in pretty good detail. The book is a bit out of date now (because, ... |
88. Java Enums forums.oracle.comSome things you want a variable to represent just naturally take a limited set of options best represented by names. Day of week, Compass direction (North, South, East or West) or the like. You could use an integer and define a small set of values, but the enum provides a cleaner and more type-safe approach. |
89. Stupid enum question forums.oracle.com/** * Returns an array containing the constants of this enum * type, in the order they're declared. This method may be * used to iterate over the constants as follows: * * for(E c : E.values()) * System.out.println(c); * * @return an array containing the constants of this enum * type, in the order they're declared */ public static E[] ... |
90. enums forums.oracle.com |
91. Enum in java 1.4 forums.oracle.comHai friends We have enum functionality in Java1.5. we don't have it in 1.4. If you want one, here is the code.(Enum in java 1.4) import javax.print.attribute.*; class Bach extends EnumSyntax { public Bach(int x) { super(x); } public static final Bach JOHANN_SEBASTIAN = new Bach(0); public static final Bach WILHELM_FRIEDEMANN = new Bach(1); public static final Bach CARL_PHILIP_EMMANUEL = new ... |
92. enum forums.oracle.com |
93. Enums forums.oracle.com |
94. Uncessary enum qualification forums.oracle.comOK, I can see why the compiler does what it does, but I can't see why the compiler can't [...] Well, firstly it would make the grammar for the parser much harder to write and much less efficient, and secondly it's generally considered better to have a single unambiguous syntax for these things. The sort of thing you're describing is often ... |
95. Enum? forums.oracle.com |
96. Extendable Enums forums.oracle.com |
97. Enums forums.oracle.comI know there's no harm in that. It's just to make the code more clear and avoid unnecessary instantiations. mleiria I'd actually like to see what other people think about this. theoretically, yes, it's a good idea, but my take is that anyone using the code will see it's just full of constants, and not worth instantiating anyway, and experience tells ... |
98. enum key word is available before JDK 1.5 or not forums.oracle.com |
99. Self-referencing enum forums.oracle.com} The code above creates an entry in the enum called "son" that contains a reference to "dad" and "mom" that are both elements in the same enum. Code that uses this enum will find that both "father" and "mother" are null for "son". Is that right? Is there a better way or prefered way to do this? |
100. doubt with an enum program forums.oracle.com |