java.util.TreeMap $ Entry.entrySet（）适用于参数类型：（）values：[] [英] java.util.TreeMap$Entry.entrySet() is applicable for argument types: () values: []

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问题描述

我有 ChatDayWrappers ，它包含双方数据库中所有消息在一天之内。



我可以使用来自对象 chatWrapper.getChatDayWrappers（）[0]; 的47个项目来获取chatRowWrappers吗？
$ b
$ b

代码 

  chatWrapper.getChatDayWrappers（）[0]; 
 getLogger（）。info（chatWrapper：+ object.getClass（）。getName（））;

输出 

  java.util.TreeMap $ Entry

另一个尝试：

我已经厌倦了以下内容： 

  Object object [] = chatWrapper.getChatDayWrappers（）[0] .entrySet（）。toArray（）; 
 getLogger（）。info（chatWrapper：+ object.getClass（）。getName（））;

但我得到了这个错误：


没有方法的签名：java.util.TreeMap $ Entry.entrySet（）适用于参数类型：（）values：[]
可能的解决方案：every（）：groovy.lang。 MissingMethodException：没有方法的签名：java.util.TreeMap $ Entry.entrySet（）适用于参数类型：（）values：[]


CockpitChatWrapper 

 公共类CockpitChatWrapper 
实现Serializable {
 
 private static final long serialVersionUID = 1L; 
 
 public static final String STYLE_CHAT_UNKNOWN =tpChatUnknown; 
 public static final String STYLE_CHAT_FROM =tpChatFrom; 
 public static final String STYLE_CHAT_TO =tpChatTo; 
 
 / **用于格式化报告中的日期。 * / 
 private static final ThreadLocal< SimpleDateFormat> DATE_FORMAT = new ThreadLocal< SimpleDateFormat>（）{
 
 @Override 
保护SimpleDateFormat initialValue（）{
返回新的SimpleDateFormat（yyyy-MM-dd）; 
} 
}; 
 
 private final Map< String，ChatDisplayDayWrapper> chatDayWrappers; 
 
 private final Long currentUserId; 
 private final Long currentFlexiObjectId; 
 
 
 / ** 
 *构造函数。 
 * 
 * @param currentUserId用户标识。 
 * @param currentFlexiObjectId flexiObejct Id。 
 * / 
 public CockpitChatWrapper（final Long currentUserId，final Long currentFlexiObjectId）{
 this.chatDayWrappers = new TreeMap< String，ChatDisplayDayWrapper>（new Comparator< String>（）{
 
 public int compare（final String o1，final String o2）{
 return（o1.compareTo（o2）* -1）; 
} 
 
}）; 
 this.currentUserId = currentUserId; 
 this.currentFlexiObjectId = currentFlexiObjectId; 
} 
 
 
 / ** 
 * 
 *添加聊天记录。 
 * 
 * @param聊天聊天记录。 
 * / 
 public void addChatEntry（final Chat chat）{
 
 String key = CockpitChatWrapper.DATE_FORMAT.get（）。format（chat.getLastWrite（））; 
 ChatDisplayDayWrapper entry = null; 
 if（this.chatDayWrappers.get（key）！= null）{
 entry = this.chatDayWrappers.get（key）; 
} else {
 entry = new ChatDisplayDayWrapper（chat.getLastWrite（））; 
 this.chatDayWrappers.put（key，entry）; 
} 
 
 entry.addChat（chat，this.currentUserId，this.currentFlexiObjectId）; 
} 
 
 
 / ** 
 *返回chatDayWrappers。 
 * 
 * @return返回chatDayWrappers。 
 * / 
 public Object [] getChatDayWrappers（）{
 return this.chatDayWrappers.entrySet（）。toArray（）; 
} 
 
 
 public boolean getHasChatDayWrappers（）{
 return this.chatDayWrappers！= null&& this.chatDayWrappers.size（）> 0; 
} 
 
 / ** 
 * 
 *将聊天记录保留一天。 
 * 
 * / 
 public static class ChatDisplayDayWrapper 
实现Serializable {
 
 private static final long serialVersionUID = 1L; 
 
私人决赛日期日; 
 private final List< ChatDisplayRowWrapper> chatRowWrappers; 
 
 
 / ** 
 * 
 *构造函数。 
 * 
 * @param day设置的日期。 
 * / 
 public ChatDisplayDayWrapper（final date day）{
 this.day = day; 
 this.chatRowWrappers = new ArrayList< ChatDisplayRowWrapper>（）; 
 
 
 $ b private void addChat（最终聊天聊天，最终Long currentUserId，最终Long currentFlexiObjectId）{
 
 String styleClass = CockpitChatWrapper.STYLE_CHAT_UNKNOWN; （）currentUserId！= null&& chat.getFromUser（）！= null 
&&&& currentUserId.longValue（）== chat.getFromUser（）。getId（） .longValue（））{
 styleClass = CockpitChatWrapper.STYLE_CHAT_FROM; 
} else if（currentFlexiObjectId！= null&&&& chat.getFromFlexiObject（）！= null 
&&&&& amp; currentFlexiObjectId.longValue（）== chat.getFromFlexiObject（）。getId（）。longValue （））{
 styleClass = CockpitChatWrapper.STYLE_CHAT_TO; 
} 
 this.chatRowWrappers.add（new ChatDisplayRowWrapper（chat，styleClass））; 
} 
 
 
 / ** 
 *返回当天。 
 * 
 * @return返回一天。 
 * / 
 public Date getDay（）{
 return this.day; 
} 
 
 
 / ** 
 *返回chatRowWrappers。 
 * 
 * @return返回chatRowWrappers。 
 * / 
 public List< ChatDisplayRowWrapper> getChatRowWrappers（）{
返回this.chatRowWrappers; 
} 
 
} 
 
}

截图


$ p $ public Object [] getChatDayWrappers（）{
返回this.chatDayWrappers.entrySet（）。toArray（）;
}

返回一个Object数组，您无法直接访问地图内的ChatDisplayDayWrapper对象。相反，您可以将您的getter修改为：

  public List< ChatDisplayRowWrapper> getChatDayWrappers（）{
 return m.entrySet（）。stream（）。map（entry  - > entry.getValue（））。collect（Collectors.toList（））; } 
}


I have ChatDayWrappers which contains all messages in the database between the two parties for one day.

How can I get the the chatRowWrappers with the 47 items from the object chatWrapper.getChatDayWrappers()[0];?

Code

Object object = chatWrapper.getChatDayWrappers()[0];            
getLogger().info("chatWrapper:  " + object.getClass().getName());

output

java.util.TreeMap$Entry

Another try:

I have tired the following:

Object object[] = chatWrapper.getChatDayWrappers()[0].entrySet().toArray();             
getLogger().info("chatWrapper:  " + object.getClass().getName());

but I got this error:

No signature of method: java.util.TreeMap$Entry.entrySet() is applicable for argument types: () values: [] Possible solutions: every(): groovy.lang.MissingMethodException: No signature of method: java.util.TreeMap$Entry.entrySet() is applicable for argument types: () values: []

CockpitChatWrapper

public class CockpitChatWrapper
        implements Serializable {

    private static final long serialVersionUID = 1L;

    public static final String STYLE_CHAT_UNKNOWN = "tpChatUnknown";
    public static final String STYLE_CHAT_FROM = "tpChatFrom";
    public static final String STYLE_CHAT_TO = "tpChatTo";

    /** Used to format the dates in the report. */
    private static final ThreadLocal<SimpleDateFormat> DATE_FORMAT = new ThreadLocal<SimpleDateFormat>() {

        @Override
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat("yyyy-MM-dd");
        }
    };

    private final Map<String, ChatDisplayDayWrapper> chatDayWrappers;

    private final Long currentUserId;
    private final Long currentFlexiObjectId;


    /**
     * Constructor.
     * 
     * @param currentUserId The user Id.
     * @param currentFlexiObjectId The flexiObejct Id.
     */
    public CockpitChatWrapper(final Long currentUserId, final Long currentFlexiObjectId) {
        this.chatDayWrappers = new TreeMap<String, ChatDisplayDayWrapper>(new Comparator<String>() {

            public int compare(final String o1, final String o2) {
                return (o1.compareTo(o2) * -1);
            }

        });
        this.currentUserId = currentUserId;
        this.currentFlexiObjectId = currentFlexiObjectId;
    }


    /**
     * 
     * Add a chat entry.
     * 
     * @param chat The chat entry.
     */
    public void addChatEntry(final Chat chat) {

        String key = CockpitChatWrapper.DATE_FORMAT.get().format(chat.getLastWrite());
        ChatDisplayDayWrapper entry = null;
        if (this.chatDayWrappers.get(key) != null) {
            entry = this.chatDayWrappers.get(key);
        } else {
            entry = new ChatDisplayDayWrapper(chat.getLastWrite());
            this.chatDayWrappers.put(key, entry);
        }

        entry.addChat(chat, this.currentUserId, this.currentFlexiObjectId);
    }


    /**
     * Returns the chatDayWrappers.
     * 
     * @return Returns the chatDayWrappers.
     */
    public Object[] getChatDayWrappers() {
        return this.chatDayWrappers.entrySet().toArray();
    }


    public boolean getHasChatDayWrappers() {
        return this.chatDayWrappers != null && this.chatDayWrappers.size() > 0;
    }

    /**
     * 
     * Hold the chat entries for an day.
     * 
     */
    public static class ChatDisplayDayWrapper
            implements Serializable {

        private static final long serialVersionUID = 1L;

        private final Date day;
        private final List<ChatDisplayRowWrapper> chatRowWrappers;


        /**
         * 
         * Constructor.
         * 
         * @param day The day to set.
         */
        public ChatDisplayDayWrapper(final Date day) {
            this.day = day;
            this.chatRowWrappers = new ArrayList<ChatDisplayRowWrapper>();
        }


        private void addChat(final Chat chat, final Long currentUserId, final Long currentFlexiObjectId) {

            String styleClass = CockpitChatWrapper.STYLE_CHAT_UNKNOWN;

            if (currentUserId != null && chat.getFromUser() != null
                    && currentUserId.longValue() == chat.getFromUser().getId().longValue()) {
                styleClass = CockpitChatWrapper.STYLE_CHAT_FROM;
            } else if (currentFlexiObjectId != null && chat.getFromFlexiObject() != null
                    && currentFlexiObjectId.longValue() == chat.getFromFlexiObject().getId().longValue()) {
                styleClass = CockpitChatWrapper.STYLE_CHAT_TO;
            }
            this.chatRowWrappers.add(new ChatDisplayRowWrapper(chat, styleClass));
        }


        /**
         * Returns the day.
         * 
         * @return Returns the day.
         */
        public Date getDay() {
            return this.day;
        }


        /**
         * Returns the chatRowWrappers.
         * 
         * @return Returns the chatRowWrappers.
         */
        public List<ChatDisplayRowWrapper> getChatRowWrappers() {
            return this.chatRowWrappers;
        }

    }

}

screenshot

解决方案

The issue here is:

public Object[] getChatDayWrappers() {
        return this.chatDayWrappers.entrySet().toArray();
    }

returns an Object array that you cannot directly access the ChatDisplayDayWrapper object inside the map. Instead, you could modify your getter to:

public List<ChatDisplayRowWrapper> getChatDayWrappers() {
    return m.entrySet().stream().map(entry -> entry.getValue()).collect(Collectors.toList());        }
}

这篇关于java.util.TreeMap $ Entry.entrySet（）适用于参数类型：（）values：[]的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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