java enum class example

class? AccordingEnumAndEnum classCan be determined based on the requirements for constant types.EnumOrEnum class. Applicable to the following scenariosEnum: The constant type is used for internal representation and is not used to display the name. A constant value does not need to provide additional attributes. For example, you only need to know

, when I read objective Java, I found a chapter dedicated to enum, and the benefits of calling enum in the book, and the advantages of enum in Java compared to enumeration types in other languages. I have a close understanding, but I began to pay attention to

When I recently discussed the issue with my colleagues, my colleague suddenly mentioned why the constant values defined in Java do not take the ENMU enumeration type and are defined by the public final static type. We used to be defined in this way, rarely using the enum definition, so also did not pay attention to, in the face of the problem, it is still a little unclear why there is such a definition. If

), in which case the program may have problemsIn summary, the traditional enumeration has the following two drawbacksSecurityReadability, especially when printing logsSo Java introduces an enum, and with Enum, it's easy to implement the enumeration above, and it's easy to avoid the risk of passing in illegal values.What is the enumeration principle?The essence of

Simple IntroductionEnum types in Java are defined by the keyword enum, a new type from jdk1.5, and all enum types inherit from the enum type. To understand enumeration types, we recommend that you first open the enum class in the

An explanation of the enumeration types in Java:Simple example: Public enum color{ red,blue,black,yellow,green } Complex examples (with custom construction methods and types) Public enumenumtest {FRANK ("The given name of me"), LIU ("The family name of Me"); PrivateString context; PrivateString GetContext () {return This. Context; } PrivateEnumtest (String context) { This. Context =context; }

　　This article is mainly about enumeration types of the base class enum class to do an introduction:First, the Enum class is located under the Java.lang package, and according to the class's introduction, the Enum

(); } } } enum theSecondEnum { ONE, TWO, THREE, } This construction is invalid in actual calls, And the compiler reports an error. For example, the call function of the form is as follows: private void button1_Click(object sender, EventArgs e) { TestEnum testEnum = new TestEnum((theFirstEnum)random.Next(3),(theSecondEnum)random.Ne

What is an enumeration? Enumerations are new features introduced by JDK5. In some cases, the objects of a class are fixed and can be defined as enumerations. In practice, enumeration types can also be used as a specification to guarantee the safety of program parameters. Enumerations have the following characteristics: The levels of enumerations and classes and interfaces in Java are the same. En

() { return "SAMPLE2"; } }; abstract String getInfo (); //Test public static void Main (String args[]) { For (Testenummathod method:values ()) { System.out.println (Method.getinfo ()); } } } The following may be a bit boring, but definitely worth a glimpse1. Code:public class State {public static final int on = 1;public static final Int off= 0;}What's wrong, everyone has been so used for a long time, no problem ah.First, i

In some cases, the object of a class is limited and fixed, such as the season class, it has only 4 objects: Spring, summer, autumn, winter. This example of a finite and fixed class, in Java, is called an enumeration class.1 Manual

Objective In daily programming, there are often such "datasets," whose values are stable in the program, and the elements in the dataset are finite. For example, from Monday to Sunday, seven data elements constitute a week of "data sets", Four seasons of four data elements constitute the "dataset". How do you better use these "datasets" in Java? So the enumeration came in handy. An enumeration is actually

Enum enum is the keyword in both C + + and Java, but they are not the same. For C + +, enumerations are a series of named Integer constants, and conversion from enumeration values to corresponding integer values is done internally. For Java, enumerations are more like named instances of a

1 Enum This is a common basic class for all Java language enumeration types.2. Common sorting algorithms Bubble Method. Simple. This method can be used for small demands. Fast sorting. Determine the keyword and divide the data into two parts: less than and greater than the keyword. Then recursively arrange the two parts. Insert sorting. Data is divided in

An enumeration type, the Enum keyword, was added to Java SE5. Before this, when you need to create a set of shaped constants, but these enumerated values do not necessarily limit their own values within the range of the constant set, so it is not safe to do so, and it is not easy to use. Now that we have an enum, we have solved the above problem.Although an

Concept enum, called enumeration, is the new feature introduced in JDK 1.5. In Java, enum types that are decorated by keywords are enumerated types. The form is as follows: Enum Color {RED, GREEN, BLUE} If the enumeration does not add any methods, the enumeration value defaults to the ordered value star

Enumeration understands:The enumeration type is part of the new feature in Java 5, which is a special type of data that is special because it is a class type but has some special constraints over the class type, butThe existence of these constraints also creates the simplicity, security, and convenience of enumeration types.Keyword:

Public classTestenum {/*the most common enumeration*/ Public enumcolorselect {red, green, yellow, blue; } /*enumerations can also add methods and properties like normal classes, and you can add static and non-static properties or methods to it, all as you do in a generic class.*/ Public enumSeason {//enum list must be written first, or compile errorwinter, Spring, summer, fall; Private Final Stat

Writer:bysocket (mud and brick pulp carpenter)Micro-Blog: BysocketWatercress: BysocketReprint it anywhere u want.Written in the FontWhen we are set some constants for projects, we always use the ' public static final ' to set INT or String constants. Or Sometimes,we can also set the paramters in properties. When the project Starts,we can get the properties of the them. Today,we can use Enum (JDK 1.5).Three pieces:1. An

two days, it was found that there was a chapter devoted to enum, and the emphasis in the book was on the benefits of using enums, as well as the power of enum types in Java compared to other languages. I was smattering, but I began to pay attention to the special thing about enum.Through various aspects of research, I found that the