blocks|key|3028257|text|不，你不能强迫用户这样做，你可以很客气地问他……|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3028258|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|$]]

No, you cannot force the user to do that, you could ask him very nicely though ...

blocks|key|2572010|text|不是的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2572011|编译器又是如何做到这一点的呢？由于这些异常是未检查的，它们不会在方法签名中声明(大部分情况下)，那么它如何知道需要处理哪些异常呢？|2572012|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|$]]

No.

And how would the compiler even do that? Since these exceptions are unchecked, they are not declared in the method signatures (for the most part), so how would it know what needs to be handled?

blocks|key|4757335|text|不，你不能。通常，如果要强制用户处理未检查的异常，可以手动捕获它们并将它们包装在已检查的异常中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4757336|例如|4757337|Integer+a;
try+{
++++a+=+1;
}
catch+(NullPointerException+e)+{
+++++throw+new+Exception(e);
}|code-block|syntax|javascript|4757338|如果a为空，则NPE将被抛出。然后，它被包装在一个经过检查的Exception中。(异常在这里可能太通用了，所以你可能必须创建你自己的检查执行类)|offset|length|style|CODE|4757339|这种模式的问题是，您必须检查所有可能存在未检查异常的地方。这些并未声明为方法签名的一部分，因此这可能意味着要遍历API。|4757340|或者你甚至可以更脏，并且有很多try/catch块来捕获Exception。Exception是RuntimeException的超类，因此它可以捕获未检查的异常。|4757341|我不确定你想要做的是正确的方法。未检查的异常通常是程序员的错误，所以实际上是要被捕获的。它们通常是代码中的bug。(关于你可以在谷歌上搜索的未检查/已检查异常的点，有一个巨大的争论)|4757342|entityMap^0|0|0|0|U|9|0|0|S|9|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Z|8|@$K|10|L|11|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|12|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|13|8|@$K|14|L|15|M|N]]|9|@]|A|$]]|$1|S|3|T|5|6|7|16|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|V|$]]

No you cant. Usually if you want to force the user to handle unchecked exception you manually catch them and wrap them in checked exceptions

eg

<pre><code>Integer a;
try {
 a = 1;
}
catch (NullPointerException e) {
 throw new Exception(e);
}
</code></pre>

and a is null the NPE will be thrown. It is then wrapped in a checked <code>Exception</code>. (Exception is probably too generic here so you may have to create your own checked excpetion class)

The trouble with this pattern is that you have to check everywhere for where there may be unchecked exceptions. These are not declared as part of the method signatures so it may mean trawling through the API.

Or you could be even dirtier and have lots of try/catch blocks which catch <code>Exception</code>. Exception is a superclass of RuntimeException so it would catch unchecked exceptions.

I am not sure what you want to do is the right approach. Unchecked exceptions are usually programmer errors so are really meant to be caught. They are usually bugs in code. (and there is a massive debate about the point of unchecked/checked exception which you can google)

blocks|key|2574770|text|不，您不能强制用户处理未检查的异常，这不是未检查的异常的目的。对于强制处理，有checked+exceptions。但是，您可以要求用户处理程序中所有异常。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2574771|entityMap^0|B|6|13|I|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

No, you can't exactly force user to handle unchekced exceptions that is not what unchecked exceptions are meant for. For force handling there are checked exceptions. However, You can ask user to handle all the exceptions in your program.

blocks|key|4757485|text|不，你不能。AFAIK你最好的机会是使用shutdown+hook|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4757486|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html#addShutdownHook%2528java.lang.Thread%2529^0|K|D|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

No, you can't. AFAIK the best chance you is to use a <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html#addShutdownHook%28java.lang.Thread%29" rel="nofollow">shutdown hook</a>

Is there a way to developer user to handle all unchecked exception in the code so that code would not compile until all unchecked exception are handled? I would like to force user to handle exceptions like

<pre><code>iterator.next()
</code></pre>

java force developer to handle unchecked exception

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

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

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

有没有办法让开发人员处理代码中所有未检查的异常，以便代码在处理所有未检查的异常之前不会编译？我想强制用户处理异常，比如iterator.next()

问java强制开发人员处理未检查的异常
EN

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java强制开发人员处理未检查的异常EN