java enum valueof

Usage One: Constants Before JDK1.5, we defined constants as: public static fianl ... Now that you have enumerations, you can group related constants into an enumeration type, and enumerations provide more methods than constants. public enum Color { RED, GREEN, BLANK, Yellow } Usage Two: Switch The switch statement before JDK1.6 only supports the Int,char,enum type, and using enumerations makes our c

The enumeration class is defined as follows:Package com.qunar.enumtest; Public enumStatus {scuuess ("1","Success"), FAILED ("2","Failed");PrivateStringvalue;PrivateString desc; PublicStringGetValue() {return value; } Public void SetValue(Stringvalue) { This.value=value; } PublicStringGetDesc() {returnDesc } Public void Setdesc(String desc) { This. desc = desc; }Private Status(Stringvalue, String desc) { This.value=value; This. desc = desc; }}Use the following methods:Packagecom. Qunar. Enumtest;

Package Com.st.java; /** @author*/publicenum moneytype { Zero_point_one, zero_point_five, One, FIVE, TEN, Twenty, fity, hundred }Package Com.st.java;public class Moneytypetest {public static void main (string[] args) {testenum (); Testswitch (Moneytype.one); Testswitch (moneytype.fity);} public static void Testenum () {for (Moneytype mt:MoneyType.values ()) {//ordinal: Constant Declaration order System.out.println (mt+ ", Ordina L: "+mt.or

//print a specific value; Public classDemo1 { Public voidTest () {print (GRADE.A); } Public voidPrint (Grade Grade) {//print a specific value;String value=Grade.localvalue (); System.out.println (value); } /** Method One static class Grade{public Grade () {} private static final Grade A =new Grade (); private static final Grade b=new Grade (); private static final Grade c=new Grade (); private static final Grade d=new Grade (); }*/ //Method Two enumgr

Extend the content of the introduction to Programming (Java) 3.2.6 to introduce the enumin a comprehensive way.1. Basic usageThe keyword enum introduced in Java 5, which defines the enumeration type (enumerated type).public enum direction{ Up,down,left,right}☆ effectively reduce the declaration of public static fina

The Java enum is singleton class (only one instance). Java uses compilers and JVMs to prevent an enum from generating more than one class: You cannot use the new, Clone (), De-serialization, and Reflection APIs to produce an enum's instance. So there are other ways to create an enumerated object by reflection: For exam

In Java, serialization of an enum type differs from the serialization of other object types, to see what is different today. Let's look at how the enum we defined in Java is going to look like after being compiled. Java code: Java

Copy from other people there myeclipse Java engineering, open a look marked red a large, careful look, it is not recognized enum keyword, this is a bit embarrassing. I built a Java project myself and tested it, if I chose JavaSE-1.6 when I was building a new project: is to identify the enum keyword, but if I choose

JDK1.5 introduces a new type--enumeration. In Java, although it is a "small" function, but to my development has brought "big" convenience.Usage One: constant.Before JDK1.5, we defined constants: public static fianl ..... Now, with enumerations, you can group related constants into an enumeration type, and enumerations provide more methods than constants. Public enum Color { RED, GREEN, BLANK, YELLOW}Si

attributes of the class type, such as construction method, member variable, member method, etc. This is the enumeration type not only has to distinguish the different categories of functions, and even can add their own methods for different types, of course, to implement an interface before the line, and implement some of these types of public methods, so the enumeration type to represent different types, it is more flexible than with different static constants.The difference between an enumera

PackageCn.edu.shu.web.util;/** * * @author Tkpad [ Email protected] * @version V1.0.0 * */ Public enumFileType {WORD (1), TXT (2), ANNO (3);//Note that the sentence must be placed in the first line Private intType//define the variable used in the database, or the value of the enumeration variable //Use a constructor to assign a value to a defined enumeration variable Private FileType(intType) { This. type = type; }//By overwrite the ToString method, you can get the value of the enume

/** * Created by Lzd on 2018/3/31. */public class Enumprac {public enum demo{SUCCESS (1, "success"), Fail (0, "failed"); Private Integer Code; Private String desc; Private Demo (Integer code, String desc) {this.code = code; THIS.DESC = desc; } public Integer GetCode () {return code; } public String GetDesc () {return desc; } public void Setcode (Integer code) {this.code = code; } publi

After Java1.5, the enumeration of new features was introduced, before Java had two ways of defining new types: Classes and interfaces. But in special cases, we can't satisfy our needs, for example, we define a color class, which can only have red,blue,green three values and is not valid for other values. Before we introduce enumerations, we typically use them to privatize their construction methods, and then instantiate three constants inside them, an

/*** Use of Java enumerations* @author RSun* @Date 2012-11-7 11:46:08*/public class Enumtest {public static void Main (string[] args) {System.out.println ("Using enumerations:" + T.AA);SYSTEM.OUT.PRINTLN ("Use enumeration ID:" + t.aa.getid ());SYSTEM.OUT.PRINTLN ("Use enumeration value:" + t.aa.getvalue ());System.out.println ("Get enumeration property by name:" + t.valueof ("AA"). GetId ());}public enum t{

= genEnum({ Monday: null, Tuesday: null})var myDay = WeekDay.Monday; About CamelCasegen_enumConverts the function name of the uppercase underlined enumeration keyword isXXX to the CamelCase form: var AppMode = genEnum(‘SIGN_UP, LOG_IN, FORGOT_PASSWORD‘);var curMode = AppMode.LOG_IN;console.log(curMode.isLogIn()); // 输出 trueconsole.log(curMode.isSignUp()); // 输出 falseconsole.log(curMode.isForgotPassword()); // 输出 false Project Address: Https://github.com/greenlaw110/enumjs Ht