ちょっとハマったのでメモ。JavaはMavenでコンパイルします。
Test.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23  | package com.example; import java.util.Iterator; import java.util.Map; import com.amazonaws.services.lambda.runtime.Context; public class Test {  //http://stackoverflow.com/questions/35545642/error-executing-hello-world-for-aws-lambda-in-java     public String handler(Map<String,Object> input, Context context){      String ret="";      Iterator<String> ite=input.keySet().iterator();      while(ite.hasNext()){      String key=ite.next();      String val=input.get(key).toString();      ret+="("+key+","+val+"),";      }      return ret;     } }  | 
pom.xml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56  | <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>com.example</groupId>   <artifactId>test</artifactId>   <version>0.0.1-SNAPSHOT</version>   <packaging>jar</packaging>   <name>Test</name>   <url>http://example.com</url>   <properties>     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>   </properties>   <dependencies>     <dependency>       <groupId>junit</groupId>       <artifactId>junit</artifactId>       <version>3.8.1</version>       <scope>test</scope>     </dependency>     <dependency>      <groupId>com.amazonaws</groupId>      <artifactId>aws-lambda-java-core</artifactId>      <version>1.0.0</version>  </dependency>   </dependencies>     <build>     <plugins>       <plugin>         <groupId>org.apache.maven.plugins</groupId>         <artifactId>maven-shade-plugin</artifactId>         <version>2.3</version>         <configuration>           <createDependencyReducedPom>false</createDependencyReducedPom>         </configuration>         <executions>           <execution>             <phase>package</phase>             <goals>               <goal>shade</goal>             </goals>           </execution>         </executions>       </plugin>     </plugins>   </build> </project>  | 
コンパイル
1  | mvn package  | 
Lambdaへアップロード
- zipファイルをアップロード
 - Configulationを設定
 
| Runtime | Java 8 | 
| Handler | com.example.Test::handler | 
これで動きます。テストの際に与えるパラメタの値が表示されます