Can't execute jar- file: “no main manifest attribute”

Question

I have installed an application, when I try to run it (it\'s an executable jar) nothing happens. When I run it from the commandline with:

java -jar \

Answer 1

You Can Simply follow this step Create a jar file using

 jar -cfm jarfile-name manifest-filename Class-file name

While running the jar file simple run like this

 java -cp jarfile-name main-classname

Answer 2

Alternatively, you can use maven-assembly-plugin, as shown in the below example:

<plugin>
    <artifactId>maven-assembly-plugin</artifactId>
    <executions>
      <execution>
        <phase>package</phase>
        <goals>
          <goal>single</goal>
        </goals>
      </execution>
    </executions>
    <configuration>
      <archive>
        <manifest>
          <addClasspath>true</addClasspath>
          <mainClass>com.package.MainClass</mainClass>
        </manifest>
      </archive>
      <descriptorRefs>
        <descriptorRef>jar-with-dependencies</descriptorRef>
      </descriptorRefs>
    </configuration>
  </plugin> 

In this example all the dependency jars as specified in section will be automatically included in your single jar. Note that jar-with-dependencies should be literally put as, not to be replaced with the jar file names you want to include.

Answer 3

I had this problem and i solved it recently by doing this in Netbeans 8 (Refer to the image below):

1. go to properties of your project.
2. click on Run.
3. specify the main class of your project using browse.
4. build and run the Jar file.

Answer 4

I got same error just now. If u're using gradle, just add next one in ur gradle.build:

apply plugin: 'java'

jar {
    manifest {
        attributes 'Main-Class': 'com.company.project.MainClass'
    }
}

Where com.company.project.MainClass path to ur class with public static void main(String[] args) method.

Answer 5

I had this issue when creating a jar using IntelliJ IDEA. See this discussion.

What solved it for me was to re-create the jar artifact, choosing JAR > From modules with dependencies, but not accepting the default Directory for META-INF/MANIFEST.MF. Change it from -/src/main/java to -/src/main/resources.

Otherwise it was including a manifest file in the jar, but not the one in -/src/main/java that it should have.

Answer 6

Try this command to include the jar:

java -cp yourJarName.jar your.package..your.MainClass