以上就是给各位分享更新java映射条目-Updatingajavamapentry，其中也会对java提示更新进行解释，同时本文还将给你拓展centos7java8javaUpdates进程可以关闭吗
以上就是给各位分享更新java映射条目 - Updating a java map entry，其中也会对java提示更新进行解释，同时本文还将给你拓展centos7 java8 javaUpdates进程可以关闭吗？、ClassCastException: java.util.TreeMap$Entry cannot be cast to java.lang.Comparable、ConcurrentModificationException at java.util.TreeMap$PrivateEntryIterator、ConcurrentModificationException at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207)等相关知识，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！
本文目录一览：- 更新java映射条目 - Updating a java map entry（java提示更新）
- centos7 java8 javaUpdates进程可以关闭吗？
- ClassCastException: java.util.TreeMap$Entry cannot be cast to java.lang.Comparable
- ConcurrentModificationException at java.util.TreeMap$PrivateEntryIterator
- ConcurrentModificationException at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207)
更新java映射条目 - Updating a java map entry（java提示更新）
问题：
I''m facing a problem that seems to have no straighforward solution. 我正面临一个似乎没有直接解决方案的问题。
I''m using java.util.Map , and I want to update the value in a Key-Value pair. 我正在使用java.util.Map ，我想更新Key-Value对中的值。
Right now, I''m doing it lik this: 现在，我正在这样做：
private Map<String,int> table = new HashMap<String,int>();
public void update(String key, int val) {
if( !table.containsKey(key) ) return;
Entry<String,int> entry;
for( entry : table.entrySet() ) {
if( entry.getKey().equals(key) ) {
entry.setValue(val);
break;
}
}
}
So is there any method so that I can get the required Entry object without having to iterate through the entire Map ? 那么有没有任何方法可以获得所需的Entry对象而无需迭代整个Map ？ Or is there some way to update the entry''s value in place? 或者有没有办法更新条目的价值？ Some method in Map like setValue(String key, int val) ? Map某些方法如setValue(String key, int val) ？
jrh JRH
解决方案：
参考： https://stackoom.com/en/question/4SJD
centos7 java8 javaUpdates进程可以关闭吗？
老师们， 这个进程 可以关闭吗？ 求教
kill 无效。 自动重启
ClassCastException: java.util.TreeMap$Entry cannot be cast to java.lang.Comparable
Exception in thread "main" java.lang.ClassCastException: java.util.TreeMap$Entry cannot be cast to java.lang.Comparableat java.util.TreeMap.getEntry(TreeMap.java:349)
at java.util.TreeMap.get(TreeMap.java:278)
at cn.qjj.business.WeiboBus.main(WeiboBus.java:394)
ConcurrentModificationException at java.util.TreeMap$PrivateEntryIterator
java.util.ConcurrentModificationException
at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207)
at java.util.TreeMap$KeyIterator.next(TreeMap.java:1261)
at cn.qjj.business.EmailBus.email(EmailBus.java:58)
at cn.qjj.business.EmailBus$1.run(EmailBus.java:130)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
ConcurrentModificationException at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207)
java.util. ConcurrentModificationExceptionat java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207)
at java.util.TreeMap$KeyIterator.next(TreeMap.java:1261)
at cn.qjj.business.EmailBus.email(EmailBus.java:58)
at cn.qjj.business.EmailBus$1.run(EmailBus.java:130)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
关于更新java映射条目 - Updating a java map entry和java提示更新的介绍已经告一段落，感谢您的耐心阅读，如果想了解更多关于centos7 java8 javaUpdates进程可以关闭吗？、ClassCastException: java.util.TreeMap$Entry cannot be cast to java.lang.Comparable、ConcurrentModificationException at java.util.TreeMap$PrivateEntryIterator、ConcurrentModificationException at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207)的相关信息，请在本站寻找。
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