java - 如何在 Java 中使用枚举

Question

我想知道在 java 中使用 enum 的正确方法是怎样的。我已经实现了以下代码，但出现错误。

public class GlobalVariables {

public enum Algorithm{louvain, kmeans};

public enum Evolution{survive,merge,split,dissolve};

/**
 * GED alpha threshold
 */
public static float GED_INCLUSION_ALPHA = 0.5f;

/**
 * GED beta threshold
 */
public static float GED_INCLUSION_BETA = 0.7f;}

你知道我可能做错了什么吗？

错误:该行有多个标记

• louvain cannot be resolved to a type
• 'enum' should not be used as an identifier, since it is a reserved keyword from source level 1.5 on
• Syntax error, insert ";" to complete BlockStatements
• Syntax error, insert ";" to complete ClassBodyDeclarations
• enum cannot be resolved to a type
• enum cannot be resolved to a type
• 'enum' should not be used as an identifier, since it is a reserved keyword from source level 1.5 on
• Syntax error on token ",", delete this token

Answer 1

此错误:

'enum' should not be used as an identifier, since it is a reserved keyword from source level 1.5 on

似乎暗示您正在使用 <1.5 的源版本进行编译。 Java 1.5 中引入了枚举。

检查您的编译器或 IDE 设置。

或者，您在问题中未显示的某些代码中可能存在语法错误。