10
下面的代码工作正常:投掷的RuntimeException与Optional.orElseThrow
Stream.of("key1", "key2")
.map(key -> {
SomeObject foo = service.find(key);
if (foo == null) {
throw new RuntimeException("No entity found with key: " + key);
}
return foo;
})
// ...
然而,当我使用orElseThrow从可选:
Stream.of("key1", "key2")
.map(key -> Optional.ofNullable(someService.find(key))
.orElseThrow(() -> new RuntimeException("No entity found with key: " + key)))
// ...
我得到一个编译时错误:
Error:(129, 33) java: unreported exception X; must be caught or declared to be thrown
两者都抛出RuntimeException,任何想法为什么使用Optional的方法不起作用?
更新:我的基础设施建设,我试着用的IntelliJ和Maven编译:
$ mvn -version
Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T17:41:47+01:00)
Maven home: C:\Tools\apache-maven-3.3.9
Java version: 1.8.0_91, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.8.0_91\jre
Default locale: de_AT, platform encoding: Cp1252
OS name: "windows 10", version: "10.0", arch: "amd64", family: "dos"
您使用的是哪个Java版本?对我来说这工作正常Java 8_60 –
似乎是一个重复的http://stackoverflow.com/questions/25523375/java8-lambdas-and-exceptions –
它可能对我有用,因为我尝试与日食。在相关的问题中,他们说臭虫不会影响月食。 –