blocks|key|921071|text|在C%2B%2B中，枚举只是一组已命名的整数常量。在Java中，枚举更像是类的命名实例。您可以自定义枚举上可用的成员。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|921072|此外，C%2B%2B将隐式地将枚举值转换为它们的整数等效值，而这种转换在Java语言中必须是显式的。|921073|有关更多信息，请访问Wikipedia。|offset|length|921074|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Enumerated_type^0|0|0|A|9|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@$F|S|G|T|1|U]]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

In C++, an enumeration is just a set of named, integral constants. In Java, an enumeration is more like a named instance of a class. You have the ability to customize the members available on the enumeration.

Also, C++ will implicitly convert enum values to their integral equivalent, whereas the conversion must be explicit in Java.

More information available on <a href="http://en.wikipedia.org/wiki/Enumerated_type" rel="noreferrer">Wikipedia</a>.

blocks|key|2030374|text|C/C%2B%2B中的枚举是纯整数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2030375|Java中的枚举是对象-它们可以有方法(从一个枚举实例到另一个枚举实例具有不同的行为)。此外，enum类还提供了允许迭代所有枚举实例和查找枚举实例的方法。|2030376|C%2B%2B：|2030377|typedef+enum+{+Red,+Yellow,+Green+}+Colors;

void+canCrossIntersection(Colors+c)+{
+++return+c+==+Green;
}|code-block|syntax|javascript|2030378|Java：|2030379|public+enum+Colors+{
++RED(false),
++Yellow(false),
++Green(true)+
++;

++Color(boolean+b)+{+this.b+=+b;+}
++private+boolean+b;

++public+boolean+canCrossIntersection()+{+return+b;+}
}|2030380|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|S|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|T|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Enums in C/C++ are plain Integers.

Enums in Java are objects - they can have methods (with different behavior from one enum instance to the other). Moreoever, the enum class supplies methods which allows iteration over all enum instances and lookup of an enum instance.

C++:

<pre><code>typedef enum { Red, Yellow, Green } Colors;

void canCrossIntersection(Colors c) {
 return c == Green;
}
</code></pre>

Java:

<pre><code>public enum Colors {
 RED(false),
 Yellow(false),
 Green(true) 
 ;

 Color(boolean b) { this.b = b; }
 private boolean b;

 public boolean canCrossIntersection() { return b; }
}
</code></pre>

blocks|key|2329705|text|Java+Enums的一个很好的特性是C%2B%2B+()方法。这样，您就可以获得Enum值名称(如在enum定义中所写的)，而无需在定义中添加任何额外的代码行。例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2329706|enum+Type+{T1,+T2,+T3}
Type+t+=+Type.T1;+++
System.out.println(t.name());+//+prints+T1|code-block|syntax|javascript|2329707|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A great feature of Java Enums which lacks in C++ is the name() method. This way you can get the Enum value name (as written in the enum definition) without any extra line of code in definition. For example:

<pre><code>enum Type {T1, T2, T3}
Type t = Type.T1; 
System.out.println(t.name()); // prints T1
</code></pre>

blocks|key|2329836|text|在c%2B%2B中，枚举只是整数值的列表。在java中，枚举是一个扩展了枚举的类，它是一种更好的编写方式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2329837|class+MyEnum+extends+Enum<MyEnum>
{
public+final+static+MyEnum+VE01+=+new+MyEnum();
public+final+static+MyEnum+VE02+=+new+MyEnum();
}|code-block|syntax|javascript|2329838|作为枚举：|2329839|enum+MyEnum
{
+VE01,VE02;
}|2329840|有关枚举的方法，请参阅this。因为java枚举是一个对象，所以它支持普通java对象所做的一切。赋予它们值或函数：|offset|length|2329841|enum+Binary{
+ZERO(0),ONE(1);
+Binary(int+i)
+{
+++value+=+i;
+}
+public+final+int+value;
}|2329842|一个很好的例子是匿名类：|2329843|enum+State{
StateA{
+++public+State+doSomething()
+++{
+++++//state+code+here
+++++return+StateB;
++++}
},
StateB{
++++public+State+doSomething()
++++{
+++++++return+StateA;
++++}
};
public+abstract+State+doSomething();
}|2329844|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Enum.html^0|0|0|0|0|B|4|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|16|8|@]|9|@$M|17|N|18|1|19]]|A|$]]|$1|O|3|P|5|D|7|1A|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|1C|8|@]|9|@]|A|$E|F]]|$1|U|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

In c++ an enum is just a list of integer values.
In java an enum is a class which extends Enum and is more a nice way to write:

<pre><code>class MyEnum extends Enum&lt;MyEnum&gt;
{
public final static MyEnum VE01 = new MyEnum();
public final static MyEnum VE02 = new MyEnum();
}
</code></pre>

as enum:

<pre><code>enum MyEnum
{
 VE01,VE02;
}
</code></pre>

For the Methods of enum see <a href="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Enum.html" rel="noreferrer">this</a>.
Since a java enum is an object it supports everything a normal java object does.
as giving them values or functions:

<pre><code>enum Binary{
 ZERO(0),ONE(1);
 Binary(int i)
 {
 value = i;
 }
 public final int value;
}
</code></pre>

a nice one is anonymous classes:

<pre><code>enum State{
StateA{
 public State doSomething()
 {
 //state code here
 return StateB;
 }
},
StateB{
 public State doSomething()
 {
 return StateA;
 }
};
public abstract State doSomething();
}
</code></pre>

blocks|key|921360|text|在Java中，您甚至可以通过让可扩展枚举实现相同的接口来模拟它们，然后通过调用它们的values()方法将它们的所有值添加到某种集合中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|921361|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In Java you can even emulated extensible enums by letting them implement the same interface and then add all of their values to some sort of collection by calling their values() method.

blocks|key|2329957|text|半个答案..。C%2B%2B0x强类型枚举为C%2B%2B带来了Java枚举的许多好处:强类型、作用域等等。如果你的编译器支持C%2B%2B0x强类型枚举，你应该考虑使用它们。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2329958|参考：http://www2.research.att.com/~bs/C%2B%2B0xFAQ.html#enum|offset|length|2329959|entityMap|0|LINK|mutability|MUTABLE|url|http://www2.research.att.com/~bs/C%2B%2B0xFAQ.html#enum^0|0|3|1F|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

For a semi-answer... C++0x Strongly Typed Enums bring many of the benefits of Java Enums to C++: strong typing, scope and so forth. If your compiler supports C++0x Strongly Typed Enums, you should consider using them.

Reference: 
<a href="http://www2.research.att.com/~bs/C++0xFAQ.html#enum" rel="nofollow">http://www2.research.att.com/~bs/C++0xFAQ.html#enum</a>

I am learning Enums in java I like to know what are the major differences of Enum in java and C++.
Thanks

Difference of Enum between java and C++?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在学习java中的枚举，我想知道java和C++中枚举的主要区别是什么。谢谢

问java和C++枚举的区别？
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