java enum class

as a parameter, and the value of the parameter is the value of the variable name.3. Variable name (variable name corresponding value) {Static code block}//except 2, the enumeration class also defines an abstract method, and the code block after the variable name corresponds to an anonymous inner class that implements the abstract method. As follows: Variable type variable name =new

() ; } } Public Connection getconnection () { return Connection; }}The Run method of the custom line thread is modified to: public void Run () { System.out.println (singleton.connectionfactory. Getconnection (). Hashcode ()); } 103201006910320100691032010069 5. Perfect using Enum enumeration to implement Singleton modeThe preceding section exposes enumerated classes, violat

); System.out.println (Stats.open); for(intI=0;i) {System.out.println ("Stats.values () [" +i+ "]:" +stats.values () [i]); System.out.println (Stats.valueof (Stats.values () [I].tostring ()]); } System.out.println ("《------------------------------------------------------------------》"); System.out.println (Yes. )class); System.out.println (YES.A); System.out.println (Yes.b.getcode ()); for(intI=0;i) {System.out.pr

Enumeration definition:An enum is a data type in a computer programming language. Enumeration types: In real-world problems, some variables are scoped to a limited range . For example, there are only seven days in one weeks, 12 months in a year, six courses per week in a class, and so on. If these quantities are described as integers, the character type or other types are obviously inappropriate. For this r

The enumeration classes are new after Java 5, can be used to encapsulate constants, and can also provide some methods for the use of constants.Defines the syntax for an enumeration class: Public enum enumname{ //must be placed on the first row of member 1 (A, B ... ), member 2 (A, B ... ), member 3 (A, b ...). ）........; //a,b can not P

Logcodeanddescenum {SUCCESS ("0000", "description"),Unlawfl_newspaper ("0001", "description"),Message_domain ("0002", "description");Private String Code;Private String desc;Public String GetDesc () {return desc;}Public String GetCode () {return code;}Webservicelogstatusenum (String code,string desc) {THIS.DESC = desc;This.code = code;}public static String Codegetdesc (int value) {//is converted to a description according to the status codeif (string.valueof (value). Equals ("0098")) {return SYS

I. Grammar1. Enum is all called enumeration, Chinese is commonly known as enumeration class, learn C + + and other languages of the people, should be to it knows. In the Java language Specification, however, it was introduced in the JDK version 5 and stored in the Java.lang package. In the Java version of the

, and fields to the enumeration type. Of course, the constructor is called only when constructing enumeration constants. A facet is an example:public enum Size{small ("S"), MEDIUM ("M"), LARGE ("L"), Extra_large ("XL");p rivate String abbreviation;private Size ( String abbreviation) {this.abbreviation=abbreviation;} Public String getabbreviation () {return abbreviation;}}All enum types are subclasses of the

Long time no contact enumeration class, almost forget, today take a moment to summarize it. To be honest, enumerating classes can really make a lot of sense for us.Description: Enum class It contracts a scope, it can be understood that only a fixed number of objects can be generated to call the outside world, so the constructor method in the enumeration

zero.Public final String name () returns the enumeration instance namePublic String toString () returns the enumeration yield name Traffic light Example Public enumTrafficLight {RED ("Red"), YELLOW ("Yellow"), GREEN ("Green");PrivateString name;Private TrafficLight(String name) { This. name = name; } PublicStringGetName() {returnName } Public void Jude(TrafficLight Light) {Switch(light) { CaseRED:System.out.println ("Stop"); Break; CaseYELLOW:System.out.println ("Go"); Break; CaseGREEN:Sys

class variable. If necessary, you can provide some static methods that allow other programs to get an instance of the match based on the parameters. Using an enumeration class can make your program more robust and avoid the randomness of creating objects. However, it is cumbersome to implement enumerations by defining classes to implement them, and Java