In Java (from 1.5), enums are represented usingenumdata type. Java enums are more powerful thanC/C++ enums. In Java, we can also add variables, methods, and constructors to it. The main objective of enum is to define our own data types(Enumerated Data Types). Declaration of enum in...
We can change the int constants value inThreadStatesConstantclass but the above program will not throw any exception. Our program might not work as expected but if we change the enum constants, we will get compile time error that removes any possibility of runtime issues. Java Enum Methods No...
JDK1.5 之前没有 Enum 这个类型,那时候一般用接口常量来替代。有了 JavaEnum 之后,可以更贴近的表示这种常量。 2. 如何使用 Java Enum 简单的用法: JavaEnum 简单的用法一般用于代表一组常用常量,可用来代表一类相同类型的常量值。如: 性别: publicenumSexEnum{ male,female; } 颜色: publicenumColor { RED,BL...
{ this.home=home; this.player_name = player_name ; } public void printDetails() { System.out.printf("The player's country is %s",home); System.out.printf("name: %s",player_name ); } } public class Program { public static void main(String[] args) { Sportperson mvp = new Sport...
Enumeration (enum) was not originally available in Java though it was available in other language like C and C++ but eventually Java realized and added to version 5 of Java were the safe type enumerations (Type Safe Enums), which allows you to create enums in Java, just as they exist ...
toStringin classObject Returns: the name of this enum constant hashCode public final int hashCode() Returns a hash code for this enum constant. Overrides: hashCodein classObject Returns: a hash code for this enum constant. See Also: Object.equals(java.lang.Object),System.identityHashCode(java....
Need to convert an integer to an enum in Java? The bad news is that it is not as easy as it should be, but the good news is that it is still easy! Consider the enum below. public enum PageType { ABOUT(1), CODING(2), DATABASES(3); private int value; private static Map map ...
Java introducedenumerationsin version 5. Enumerations provide a safe and clean way to manage constants. In this quick tutorial, we’ll explore how to compare aStringto anenumobject. 2. Introduction to the Problem First of all, let’s see anenumexample: ...
Dieses Tutorial zeigt, wie Sie Enum in Java in Int konvertieren. Konvertieren Sie Enum in Int in Java Java bietet keine integrierte Funktionalität zum Konvertieren von enum in int oder umgekehrt, aber wir können Methoden erstellen, um diese Operationen auszuführen. Wir können enum mit...
A simple typesafe enum declaration in Java code looks like its counterparts in the C, C++, and C# languages: enumDirection{ NORTH, WEST, EAST, SOUTH } This declaration uses the keywordenumto introduceDirectionas a typesafe enum (a special kind of class), in which arbitrary methods can be ad...