Make a Java Jar File Executable

Let’s say you’ve a Java mission as follows:

package deal thing;
public class MyProject {
    public static void foremost(String...args) throws Exception {
        System.out.println("Hey world!");

Now you need to construct this and make it a self contained executable Jar.

When you do a mvn clear set up or mvn clear package deal, and attempt to run it as follows:

java -jar goal/my-java-1.0-SNAPSHOT.jar

You’ll get the next error:

no foremost manifest attribute, in goal/my-java-1.0-SNAPSHOT.jar

Resolve no foremost manifest attribute error#

You possibly can resolve this error by including the next in your pom.xml file:

                        <mainClass> thing.MyProject</mainClass>

Now construct your answer like this:

mvn clear set up package deal

Then run your standalone Jar as follows:

java -jar goal/my-java-1.0-SNAPSHOT.jar