如何在Java中复制此C ++枚举开关？(How do I replicate this C++ enum switch in Java?)

如何在Java中复制此C ++枚举开关？(How do I replicate this C++ enum switch in Java?)

我有一些看起来像这样的C ++代码：

enum { FOO = 0x01, BAR = 0x09; }; switch (baz) { case FOO: { //... } break; case BAR: { //... } break; }

是否有可能在Java中复制此行为？

I have some C++ code that looks like this:

enum { FOO = 0x01, BAR = 0x09; }; switch (baz) { case FOO: { //... } break; case BAR: { //... } break; }

Is it possible to replicate this behaviour in Java?

最满意答案

是的，Java有枚举：

public enum BazEnum { FOO(0x01), BAR(0x09); private int value; BazEnum(int value) { this.value = value; } public int getValue() { return value; } public static BazEnum fromValue(int value) { for (BazEnum curenum : BazEnum.values()) { if (curenum.getValue() == value) { return curenum; } } return null; } } public class MainClass { public static void main(String[] params) { BazEnum baz = BazEnum.fromValue(0x09); switch baz { case FOO: ... break; case BAR: ... break; default: ... break; } } }

Yes, Java has enums:

public enum BazEnum { FOO(0x01), BAR(0x09); private int value; BazEnum(int value) { this.value = value; } public int getValue() { return value; } public static BazEnum fromValue(int value) { for (BazEnum curenum : BazEnum.values()) { if (curenum.getValue() == value) { return curenum; } } return null; } } public class MainClass { public static void main(String[] params) { BazEnum baz = BazEnum.fromValue(0x09); switch baz { case FOO: ... break; case BAR: ... break; default: ... break; } } }