entityMap|blocks|key|ddaud|text|将检查的异常作为RuntimeException传播：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|8oklp|try+{
++++return+someMethod(i);
}+catch+(SomeException+e)+{
++++throw+new+RuntimeException(e);
}|code-block|syntax|javascript|1lk2v|编辑:由于转换后的列表是延迟计算的，所以在访问列表元素之前不会抛出异常。您可以通过将转换后的列表复制到新列表中来强制求值，如下所示：|cj3jl|s+=+new+ArrayList<>(s);|48ami|您可以将其封装在一个try-catch块中，该块捕获RuntimeException并随心所欲地处理它；您的原始SomeException实例可以通过在RuntimeException上调用getCause()来获得。或者你可以让RuntimeException冒泡起来。^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|N|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|O|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|P|9|@]|A|@]|B|$]]|$2|J|4|K|6|E|8|Q|9|@]|A|@]|B|$F|G]]|$2|L|4|M|6|7|8|R|9|@]|A|@]|B|$]]]]

Propagate the checked exception as a RuntimeException:
<pre><code>try {
 return someMethod(i);
} catch (SomeException e) {
 throw new RuntimeException(e);
}
</code></pre>
EDIT: Since the transformed list is lazily evaluated, the exception won't be thrown until you access the list elements. You can force the evaluation by copying the transformed list into a new list, like:
<pre><code>s = new ArrayList&lt;&gt;(s);
</code></pre>
You could wrap that in a try-catch block that catches RuntimeException and handles it however you want; your original SomeException instance can be obtained by calling getCause() on the RuntimeException. Or you could just let the RuntimeException bubble up.

entityMap|blocks|key|cgvsq|text|这取决于您希望如何处理异常。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|65u62|当出现异常时停止列表转换:参见@dnault的答案。|dl74e|继续列表转换并删除导致异常的元素(并记录一些错误消息)。在这种情况下，当异常发生时，我们将返回null，该null值将从最终列表中删除：|7esu2|列表s=+Lists.newArrayList(+Iterables.filter(+Iterables.transform(l，new+Function()+{+@Override+public+String+apply(Integer+i)+{Lists.newArrayList{+return+someMethod(i)；}e.printStackTrace+(SomeException+e)+{+e.printStackTrace()；return+null；})，Predicates.notNull())`|8ng9|编辑如果someMethod可以返回空值，那么您应该使用如下的包装器：|ckdgr|class+Wrapper+{
++++public+Exception+exception+=+null;
++++public+String+result+=+null;
}|code-block|syntax|javascript|fhao8|然后，列表转换将是：|d8n03|List+wrappers+=+Lists.newArrayList(
++++++++++++Iterables.filter(
++++++++++++Iterables.transform(l,+new+Function()+{
+++++++++++++++@Override
+++++++++++++++public+Wrapper+apply(Integer+i)+{
++++++++++++++++++Wrapper+wrapper+=+new+Wrapper();
++++++++++++++++++try+{
++++++++++++++++++++wrapper.result+=+someMethod(i);
++++++++++++++++++}+catch+(SomeException+e)+{
++++++++++++++++++++wrapper.exception+=+e;
++++++++++++++++++}
++++++++++++++++++return+wrapper;
++++++++++++++++}
+++++++++++++}),+new+Predicate()+{
++++++++++++++++@Override
++++++++++++++++public+boolean+apply(Wrapper+wrapper)+{
++++++++++++++++++++return+wrapper.exception+==+null;
++++++++++++++++}
++++++++++++}));^0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|T|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|U|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|V|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|W|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|X|9|@]|A|@]|B|$]]|$2|K|4|L|6|M|8|Y|9|@]|A|@]|B|$N|O]]|$2|P|4|Q|6|7|8|Z|9|@]|A|@]|B|$]]|$2|R|4|S|6|M|8|10|9|@]|A|@]|B|$N|O]]]]

It depends on how you want to handle the exception.

<ol>
<li>Stop the list transformation when an exception occurs: See @dnault's answer. </li>
<li>Continue the list transformation and remove the element which caused exception (and log some error message).
In this case, we will return null when an exception occurs, this null value will be removed from final list:

<pre><code>List&lt;String&gt; s = Lists.newArrayList(
 Iterables.filter(
 Iterables.transform(l, new Function&lt;Integer, String&gt;() {
 @Override
 public String apply(Integer i) {
 try {
 return someMethod(i);
 } catch (SomeException e) {
 e.printStackTrace();
 return null;
 }
 }
 }), Predicates.notNull()))`
</code></pre></li>
</ol>

EDIT
If someMethod can return null value then you should a wrapper like this one:

<pre><code>class Wrapper {
 public Exception exception = null;
 public String result = null;
}
</code></pre>

The list transformation will then be:

<pre><code> List&lt;Wrapper&gt; wrappers = Lists.newArrayList(
 Iterables.filter(
 Iterables.transform(l, new Function&lt;Integer, Wrapper&gt;() {
 @Override
 public Wrapper apply(Integer i) {
 Wrapper wrapper = new Wrapper();
 try {
 wrapper.result = someMethod(i);
 } catch (SomeException e) {
 wrapper.exception = e;
 }
 return wrapper;
 }
 }), new Predicate&lt;Wrapper&gt;() {
 @Override
 public boolean apply(Wrapper wrapper) {
 return wrapper.exception == null;
 }
 }));
</code></pre>

entityMap|blocks|key|6c2ab|text|您可以使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|fhdif|public+interface+FunctionWithException+{
++++public+R+apply(T+t)+throws+E;
}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

You can use

<pre><code>public interface FunctionWithException&lt;T, R, E extends Exception&gt; {
 public R apply(T t) throws E;
}
</code></pre>

What is the best pattern for using Google Guava with methods that should throw exceptions?

Let's say I have:

<pre><code>public Sting someMethod(Integer i) throws SomeException;
</code></pre>

And I want to do:

<pre><code>List&lt;String&gt; s=Lists.transform(is,new Function&lt;String, Integer&gt;() {
 public String apply(Integer i) {
 return someMethod(i);
 }
 });
</code></pre>

I couldn't do the above because of the exception. Is there any nice pattern for handling it?

Using exceptions with Google Guava

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。

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 将Google Guava与应该抛出异常的方法一起使用的最佳模式是什么？ 假设我有： public Sting someMethod(Integer i) throws SomeException; 我想做的是： List s=Lists.transform(is,new Function() {       pub...

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