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[英]“Unresolved compilation problems” from running MPJ express in Eclipse Indigo
[英]sparkjava and eclipse unresolved compilation problems:
我已经在这里关注了http://sparkjava.com/documentation.html#getting-started
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>spark</groupId>
<artifactId>Spark</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spark</name>
<description>spark</description>
<dependencies>
<dependency>
<groupId>com.sparkjava</groupId>
<artifactId>spark-core</artifactId>
<version>2.2</version>
</dependency>
</dependencies>
</project>
你好
import static spark.Spark.*;
public class Hello {
public static void main(String[] args) {
get("/hello", (req, res)-> "Hello World");//eclipse error this line
}
}
我的月食有误
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
req cannot be resolved to a variable
Syntax error on token ",", . expected
Syntax error on token "-", -- expected
at Hello.main(Hello.java:5)
Java的lambda表达式是Java 8: Oracle link中的一项功能。 您需要将合规级别(以及Java版本和pom)更改为Java 8,以使此示例可以编译。
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