IncompatibleClassChangeError in Java 8 (Lambda expression)

Question

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

Did you try this on NetBeans? Also, try to clean and build the project. — Rohit Jain
– Rohit Jain, Commented Oct 3, 2013 at 10:35
Try it there. Eclipse is not yet completely stable for use with Java 8. Also try just to compile from command line, or terminal whatever you have. — Rohit Jain
– Rohit Jain, Commented Oct 3, 2013 at 10:41
you are right, eclipse has problem in supporting java8. I have successfully compiled and runned on command prompt. — Ahmet Karakaya
– Ahmet Karakaya, Commented Oct 3, 2013 at 10:52
FYI, Java 8 support on Netbeans is already really good, including very useful hints to auto-create lambda code. — assylias
– assylias, Commented Oct 3, 2013 at 17:08

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

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

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Oct 3, 2013 at 10:53

Ahmet Karakaya

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5 Comments

aepurniet Over a year ago

this is most likely a problem with the eclipse compiler, and the java8 runtime. just use the jdk8 compiler and runtime and you will be fine.

Ahmet Karakaya Over a year ago

As you may see that I am pointing jdk8 at eclipse, it indicates that there is something wrong cases not to run application properly

aepurniet Over a year ago

eclipse has a separate compiler it uses, it does not use the compiler included in the jdk.

Ahmet Karakaya Over a year ago

I don't think so, since I can change the JDK version,let say using 1.7,1.6 where lambda expression is not known.

aepurniet Over a year ago

that is a language level setting. eclipse just passes that setting into its own internal compiler. if you want eclipse to use the external compiler, use ant ant script, or a custom build step.

Patmanizer · Accepted Answer · 2018-09-10 13:51:26Z

0

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>

answered Sep 10, 2018 at 13:51

Patmanizer

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