java enum是jdk1.5新增，雖然enum是使用靜態常量來實現的，反編譯後可以看到，但是相比靜態常量，enum更安全，可以遍歷。有諸多好處。

下面是個例子：

public class TableDictionary {
	public static enum User {
		TABLE("user"),
		ID("id"),
		NAME("name"),
		AGE("age"),
		USER_ACCOUNT("user_account");
		private String name;
		private User(String name) {
			this.name = name;
		}
		
		public String getValue() {
			return name;
		}
		
		public String getTableName() {
			return User.values()[0].getValue();
		}
	}
	
	public static enum Tags{
		TABLE("tags"),
		ID("id"),
		TAGS_NAME("tags_name");
		
		private String name;
		private Tags(String name) {
			this.name = name;
		}
		
		public String getValue() {
			return name;
		}
		
		public String getTableName() {
			return Tags.values()[0].getValue();
		}
	}
}
 

public class TableDictTest {

	public static void main(String[] args) {
		for (User user : User.values()) {
			System.out.println(user);
			System.out.println(user.name());
			System.out.println(user.getValue());
			System.out.println(user.ordinal());
			System.out.println(user.toString());
			System.out.println(user.getTableName());
			System.out.println(user.getDeclaringClass());
			System.out.println(User.valueOf("ID"));
			
		}

	}

}