publicenumColor{RED(0),GREEN(1),BLUE(2),YELLOW(3);privatefinalintvalue;Color(intvalue){this.value=value;}publicintgetValue(){returnvalue;}publicstaticColorfromValue(intval){for(Colorcolor:Color.values()){if(colo
import java.util.Arrays; import java.util.EnumMap; /** * @ClassName: MyEnum * @Description: Enum learning * @author: Lxy * @date: 2021/9/23 11:53 */ public class MyEnum { enum famulei { /** * famulei:伐木累 */ ZHANGSAN, LISI, WANGWU; } public famulei NameChangedEvent(){ famul...
enum FruitEnum { APPLE(1), ORANGE(2); // 调用构造函数来构造枚举项 private int value = 0; private FruitEnum(int value) { // 必须是private的,否则编译错误 this.value = value; } public static FruitEnum valueOf(int value) { // 手写的从int到enum的转换函数 switch (value) { case 1: r...
String, int, java.lang.String, com.javase.枚举类.Day$1); static {}; } 可以看到,一个枚举在经过编译器编译过后,变成了一个抽象类,它继承了java.lang.Enum;而枚举中定义的枚举常量,变成了相应的public static final属性,而且其类型就抽象类的类型,名字就是枚举常量的名字. 同时我们可以在Operator.class的...
Java Enum和String及int的相互转化示例 一、定义性别枚举 枚举(enum),是指一个经过排序的、被打包成一个单一实体的项列表。使用枚举增加程序可读性、降低耦合性。 /** * 性别枚举 */ public enum Gender { male("男"),female("女"); private String name; ...
PLUS {publicintapply(intx,inty){returnx + y; } }, MINUS {publicintapply(intx,inty){returnx - y; } };publicabstractintapply(intx,inty); } 使用: intresult=Operation.PLUS.apply(5,3);// 8 状态机实现 publicenumOrderState{ CREATED {@OverridepublicOrderStatenextState(){returnPAID; ...
{returnthis==other;}//比较的是ordinal值publicfinalintcompareTo(Eo){Enum<?>other=(Enum<?>)o;Enum<E>self=this;if(self.getClass()!=other.getClass()&&// optimizationself.getDeclaringClass()!=other.getDeclaringClass())thrownewClassCastException();returnself.ordinal-other.ordinal;//根据ordinal值...
Java 枚举(enum) 详解7种常见的用法 而且Java 要求必须先定义 enum 实例。 Java代码 publicenumColor{RED("红色",1),GREEN("绿色",2),BLANK("白色",3),YELLO("黄色",4);// 成员变量privateStringname;privateintindex;// 构造方法privateColor(Stringname,intindex){this.name=name;this.index=index;}//...
Enum(IntPtr, JniHandleOwnership) A constructor used when creating managed representations of JNI objects; called by the runtime. Enum(String, Int32) Sole constructor. Properties Methods Rozbaliť tabuľku Explicit Interface Implementations
Enum(IntPtr, JniHandleOwnership) A constructor used when creating managed representations of JNI objects; called by the runtime. Enum(String, Int32) Sole constructor. Properties Utvid tabell Class Returns the runtime class of this Object. (Inherited from Object) DeclaringClass Returns the...