CODEWITHSUNDEEP
javaeclipselambdajava-8
Ahmet Karakaya
Ahmet Karakaya

Reputation: 10147

IncompatibleClassChangeError in Java 8 (Lambda expression)

I am trying to learn lambda expression so following http://www.oracle.com/technetwork/articles/java/lambda-1984522.html. Downloaded following IDE and JDK

JDK 8 Eclipse IDE with JDK 8 support

But When after compiled following code, I had an exception

Exception in thread "main" java.lang.IncompatibleClassChangeError
    at java.lang.invoke.MethodHandleNatives.linkMethodHandleConstant(MethodHandleNatives.java:444)
    at com.ahmetk.java8.Hello.main(Hello.java:10)
Caused by: java.lang.NoSuchMethodException: no such method: java.lang.invoke.LambdaMetafactory.metaFactory(Lookup,String,MethodType,MethodHandle,MethodHandle,MethodType)CallSite/invokeStatic
    at java.lang.invoke.MemberName.makeAccessException(MemberName.java:800)
    at java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:917)
    at java.lang.invoke.MethodHandles$Lookup.resolveOrFail(MethodHandles.java:1101)
    at java.lang.invoke.MethodHandles$Lookup.linkMethodHandleConstant(MethodHandles.java:1363)
    at java.lang.invoke.MethodHandleNatives.linkMethodHandleConstant(MethodHandleNatives.java:442)
    ... 1 more
Caused by: java.lang.NoSuchMethodError: java.lang.invoke.LambdaMetafactory.metaFactory(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
    at java.lang.invoke.MethodHandleNatives.resolve(Native Method)
    at java.lang.invoke.MemberName$Factory.resolve(MemberName.java:889)
    at java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:914)

Simple code that I am trying to execute. 

public class Hello {
    interface HelloService {
        String hello(String firstname, String lastname);
    }

    public static void main(String[] args) {

        HelloService helloService = (String firstname, String lastname) -> {
            String hello = "Hello " + firstname + " " + lastname;
            return hello;
        };
        System.out.println(helloService.hello(args[0], args[1]));

    }
}

enter image description here

Upvotes: 3

Views: 4789

Answers (2)

Patmanizer
Patmanizer

Reputation: 75

Add in your pom.xml, if you're using Maven

  <build>  
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
    </plugins>
  </build>

Upvotes: 0

Ahmet Karakaya
Ahmet Karakaya

Reputation: 10147

eclipse has problem in supporting java8. I have successfully compiled and runned on command prompt

D:\tools\java\jdk1.8.0_32Bit\bin\javac com/ahmetk/java8/Hello.java

D:\tools\java\jdk1.8.0_32Bit\bin\java -cp . com.ahmetk.java8.Hello 12 12 Hello 12 12

Upvotes: 1

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