import net.dv8tion.jda.core.entities.MessageHistory; //导入依赖的package包/类
@Override
public void action(String[] args, GuildMessageReceivedEvent event) throws ParseException, IOException {
    event.getMessage().delete().queue();
    if(core.permissionHandler.check(2, event)) return;
    if (args.length < 1) util.embedSender.error().setDescription(help()).setTitle("ERROR!").build();
    int numb = getInt(args[0]);
    if (numb > 1 && numb <= 100) {
        try{
            MessageHistory history = new MessageHistory(event.getChannel());
            List<Message> msgs;
            msgs = history.retrievePast(numb).complete();
            event.getChannel().deleteMessages(msgs).queue();
           Message msg = event.getChannel().sendMessage(new EmbedBuilder()
            .setColor(Color.GREEN)
                    .setDescription(":bomb: Deleted " + args[0] + " Messages!")
                    .build()
            ).complete();

           new Timer().schedule(new TimerTask() {
               @Override
               public void run() {
                   msg.delete().queue();
               }
           }, 3000);
        }catch (Exception e){
            e.printStackTrace();
        }
    }else {
        util.embedSender.error().setDescription(help() + "Max. 100 Message and Min. 1 Message").setTitle("ERROR!").build();
    }
}
 

import net.dv8tion.jda.core.entities.MessageHistory; //导入依赖的package包/类
private void loadMessages(MessageHistory history, int toDelete, List<Message> messages, List<Long> userIds, int loops, Consumer<List<Message>> consumer) {
    long maxMessageAge = (System.currentTimeMillis() - TimeUnit.DAYS.toMillis(14) - MiscUtil.DISCORD_EPOCH) << MiscUtil.TIMESTAMP_OFFSET;

    history.retrievePast(100).queue(historyMessages -> {
        if (historyMessages.isEmpty()) {
            consumer.accept(messages);
            return;
        }

        for (Message historyMessage : historyMessages) {
            if (historyMessage.isPinned() || historyMessage.getIdLong() < maxMessageAge) {
                continue;
            }

            if (userIds != null && !userIds.contains(historyMessage.getAuthor().getIdLong())) {
                continue;
            }

            if (messages.size() >= toDelete || loops > MAX_HISTORY_LOOPS) {
                consumer.accept(messages);
                return;
            }

            messages.add(historyMessage);
        }

        loadMessages(history, toDelete, messages, userIds, loops + 1, consumer);
    });
}