blocks|key|1526270|text|是，。这里有几个可能有意义的例子：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1526271|如果你想通过优雅地关闭|1526272|unordered-list-item|1526273|来处理这个问题如果你想向用户显示这个问题或者在你的设计中记录state|1526274|，你甚至可以清除内存，|1526275|a+working+state|1526276|1526277|但是，请注意，通常情况下(除非您处于一次分配大量内存的位置)，对于这些情况，您可能不会专门捕获OutOfMemoryError，而是在主入口点的顶部执行catch+Throwable。|CODE|1526278|entityMap^0|0|2|0|0|0|0|0|0|F|0|0|24|F|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@]|D|@]|E|$]]|$1|H|3|-4|5|I|7|Z|8|@]|D|@]|E|$]]|$1|J|3|K|5|I|7|10|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|11|8|@]|D|@]|E|$]]|$1|N|3|O|5|I|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|P|3|-4|5|6|7|15|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|16|8|@$9|17|A|18|B|S]]|D|@]|E|$]]|$1|T|3|-4|5|6|7|19|8|@]|D|@]|E|$]]]|U|$]]

Yes. Here are a few examples where it could make sense:

<ul>
<li>if you want to handle it by gracefully closing your program</li>
<li>if you want to display the problem to the user or log the error</li>
<li>depending on your design, you might even be able to clear up memory and restore a working state</li>
</ul>

However, note that normally (unless you're at a spot where you'll be allocating tons of memory at once), you probably wouldn't specifically catch OutOfMemoryError for these cases, but rather do a <code>catch Throwable</code> all the way at the top in your main entry point.

blocks|key|1526420|text|金科玉律是只捕获你能处理的错误。如果你能在OutOfMemory错误后做一些有用的事情，那就继续吧。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1526421|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

The golden rule is to only catch errors that you can handle. If you can do something useful after an OutOfMemory error, then go ahead.

blocks|key|1526316|text|不，捕获Exception和RuntimeException，但几乎从不(从‘never’更改)+Error|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1526317|1526318|+An+Error是Throwable的一个子类，它表示一个合理的应用程序不应该尝试捕获的严重问题。大多数这样的错误都是异常情况。虽然ThreadDeath错误是一种“正常”情况，但它也是Error的一个子类，因为大多数应用程序都不应该尝试捕获它。|blockquote|BOLD|1526319|1526320|1526321|备注：|1526322|我在这里引用了官方的Javadoc。如果你不同意，告诉甲骨文，不要射杀信使:-)|1526323|entityMap|0|LINK|mutability|MUTABLE|url|http://download.oracle.com/javase/6/docs/api/java/lang/Error.html^0|4|9|E|G|1D|5|1D|5|0|0|0|A|9|1V|B|2M|5|18|28|0|0|0|0|3|0|0|14|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@$9|15|A|16|1|17]]|E|$]]|$1|F|3|-4|5|6|7|18|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|19|8|@$9|1A|A|1B|B|C]|$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]|$9|1G|A|1H|B|J]]|D|@]|E|$]]|$1|K|3|-4|5|6|7|1I|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|1J|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1K|8|@$9|1L|A|1M|B|J]]|D|@]|E|$]]|$1|O|3|P|5|6|7|1N|8|@$9|1O|A|1P|B|J]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1Q|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

No, catch <code>Exception</code> and <code>RuntimeException</code>, but hardly ever (changed from 'never') <a href="http://download.oracle.com/javase/6/docs/api/java/lang/Error.html" rel="nofollow noreferrer"><code>Error</code></a>:

<blockquote>
 An Error is a subclass of <code>Throwable</code>
 that indicates serious problems that a
 reasonable application should not try
 to catch. Most such errors are
 abnormal conditions. The <code>ThreadDeath</code>
 error, though a "normal" condition, is
 also a subclass of <code>Error</code> because most
 applications should not try to catch
 it.
</blockquote>

Note: 
I'm quoting the official Javadocs here. If you don't agree, tell Oracle, don't shoot the messenger :-)

blocks|key|1526345|text|如果你想有一个优雅的关机，它具体地处理这种情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1526346|如果您可能需要分配一个大型数组，并且希望适当地降级您的系统，也可以使用它。|1526347|编辑:我用来检查OOM流是否损坏的代码示例。从那以后，我替换了len检查，以确保len在0到16MB之间。|1526348|DataInputStream+dis+=+new+DataInputStream(socket.getInputStream());

public+byte[]+readBytes()+{
++int+len+=+dis.readInt();
++try+{
++++byte[]+bytes+=+new+byte[len];
++++dis.readFully(bytes);
++++return+bytes;
++}+catch(OutOfMemoryError+e)+{
++++log.error("Corrupt+stream+of+len="%2Blen);
++++closeSocket();
++++return+null;
++}
}|code-block|syntax|javascript|1526349|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

If you want to have a graceful shutdown which handles this case specificly.

You can also use it if you may have to allocate a large array and you want to gracefully degrade your system.

EDIT: An example of code where I used to check OOM if the stream was corrupted. I have since replace the len check to ensure the len is between 0 and 16 MB instead.

<pre><code>DataInputStream dis = new DataInputStream(socket.getInputStream());

public byte[] readBytes() {
 int len = dis.readInt();
 try {
 byte[] bytes = new byte[len];
 dis.readFully(bytes);
 return bytes;
 } catch(OutOfMemoryError e) {
 log.error("Corrupt stream of len="+len);
 closeSocket();
 return null;
 }
}
</code></pre>

blocks|key|1526489|text|这已经被提到过很多次了，但回复表明，一些人对这种(常见的)+OutOfMemoryError恢复技术感到困惑。请查看我在What+if+new+fails?上的帖子，了解如何做到这一点。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1526490|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/4785343/what-if-new-fails/4786461#4786461^0|U|G|1O|I|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

This has already been mentioned a number of times, but the replies indicate a few people are confused about this (common) recovery technique for an <code>OutOfMemoryError</code>. Check my post to <a href="https://stackoverflow.com/questions/4785343/what-if-new-fails/4786461#4786461">What if new fails?</a> for a demo of how to do it.

blocks|key|5196616|text|我做过的唯一一个地方就是移动开发。您可以要求用户关闭其他应用程序，以使您的应用程序能够正常工作。但这不是Android开发的情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5196617|在这种情况下，我看不出你还能做什么。可能是一些适当的日志记录或清理。|5196618|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

The only place I have done that was mobile development. You can ask user to close other applications in order to give your application ability to work properly. But that's not the case of Android development.

I don't see any other things you can do with the situation. May be, some appropriate logging or cleanup.

blocks|key|5196640|text|这不是一个异常；这是一个错误:+java.lang.OutOfMemoryError|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5196641|您可以在它从Throwable下降时捕获它：|5196642|5196643|尝试{|blockquote|5196644|5196645|//在这里创建大量对象，并将它们存放在某个地方|5196646|}+catch+(OutOfMemoryError+E)+{|5196647|//释放上述部分(全部)对象|5196648|}|5196649|5196650|然而，除非你正在做一些相当具体的事情(例如，在一个特定的代码段中分配大量的东西)，否则你很可能无法捕捉到它，因为你不知道它将从哪里抛出。|5196651|entityMap^0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|W|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|X|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|Y|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|10|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|11|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|12|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|13|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|14|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|15|8|@]|9|@]|A|$]]|$1|T|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|U|$]]

It's not an exception; it's an error: java.lang.OutOfMemoryError
You can catch it as it descends from Throwable:
<blockquote>
try {
// create lots of objects here and stash them somewhere
} catch (OutOfMemoryError E) {
// release some (all) of the above objects
}
</blockquote>
However, unless you're doing some rather specific stuff (allocating tons of things within a specific code section, for example) you likely won't be able to catch it as you won't know where it's going to be thrown from.

blocks|key|2117403|text|这是你永远不会发现的错误之一。原因很简单，您将无法在运行时对其执行任何操作。但是，如果您的应用程序经常遇到此错误，那么您应该考虑以下策略来缓解此问题-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2117404|2117405|通过添加JVM参数|ordered-list-item|2117406|来增加jvm可用的内存|2117407|2117408|+-Xms1024m+-Xmx1024m|blockquote|2117409|2117410|2117411|2117412|如果错误仍然存在，则使用JProfiler或Eclipse之类的分析器来分析您的应用程序使用了多少内存。|2117413|迁移到64位系统并进一步增加了JVM内存。|2117414|2117415|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|X|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|Y|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|10|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|11|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|12|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|P|5|E|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|E|7|15|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|16|8|@]|9|@]|A|$]]|$1|T|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|U|$]]

This is one of the errors you should never catch. The reason for this is simple you will not be able to do anything about it at runtime. However if your application is regularly facing this error then you should consider the following strategies to mitigate this issue-

<ol>
<li>Increase the memory available to the JVM by adding jvm args </li>
</ol>

<blockquote>
 -Xms1024m -Xmx1024m
</blockquote>

<ol>
<li>If the errors still persist then use a profiler like JProfiler or a Eclipse MAT to analyze how much memory your application uses.</li>
<li>Move to a 64 bit system and increase the JVM memory even further.</li>
</ol>

Is there any point catching an out of memory error (<code>java.lang.OutOfMemoryError</code>) in Java?

Catching OutOfMemoryError

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

教程

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云智能顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云AI代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

功能1上新10个字符

功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符。

功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符。

功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符

功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符

功能4上新

文章&问答评论现已支持表情

全新交互，全新视觉，新增快捷键、悬浮工具栏、高亮块等功能并同时优化现有功能，全面提升创作效率和体验

社区富文本编辑器全新改版！诚邀体验～ 

精选全网热门MCP server，让你的AI更好用 🚀

💥开发者 MCP广场重磅上线！

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

聚焦“写作效率、视觉美观与运行性能”三方面进行全面升级，为您提供更高效、稳定的创作环境

社区富文本&Markdown编辑器全新改版上线，欢迎大家体验!

诚挚邀请您参与本次调研，分享您的真实使用感受与建议。您的反馈至关重要，感谢您的支持与参与！

社区新版编辑器体验调研

在Java中捕获内存不足错误(java.lang.OutOfMemoryError)有意义吗？

问捕获OutOfMemoryError
EN

回答 8

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问捕获OutOfMemoryErrorEN

回答 8

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问捕获OutOfMemoryError
EN