Entrypoint isn’t within the current project

Query – Entrypoint isn’t within the current project

This error usually occurs when you are trying to reference an entrypoint that doesn’t exist or is not included in the current project. An entrypoint is the starting point of your application where the execution begins.

Here is an example to demonstrate this error:

    project
    ├── src
    │   ├── main
    │   │   ├── java
    │   │   │   └── com
    │   │   │       └── example
    │   │   │           ├── EntryPoint.java   <- Entrypoint class
    │   │   │           └── MyClass.java
    │   │   └── resources
    │   └── test
    │       └── java
    │           └── com
    │               └── example
    │                   └── MyClassTest.java
    └── pom.xml
  

In the above project structure, we have an entrypoint class called “EntryPoint.java” located in the package “com.example”. Let’s assume this class contains the main method and serves as the entrypoint for our application.

Now, if we try to execute the project from a different class that doesn’t have the main method or is not marked as the entrypoint, we will encounter the “Entrypoint isn’t within the current project” error.

    // MyClass.java (Not an entrypoint)
    
    package com.example;
    
    public class MyClass {
        public void doSomething() {
            System.out.println("Doing something...");
        }
    }
    
    // Compilation Error: Entrypoint isn't within the current project
  

In the above example, the “MyClass.java” does not have the main method and is not designated as the entrypoint. Therefore, if you try to run this class, you will encounter the error mentioned.

To resolve this issue, you need to ensure that you are referencing the correct entrypoint class that contains the main method. In our example, changing the execution target to “EntryPoint.java” would resolve the error.

    // EntryPoint.java (Entrypoint class)
    
    package com.example;
    
    public class EntryPoint {
        public static void main(String[] args) {
            System.out.println("Hello, World!");
        }
    }
    
    // Output: Hello, World!
  

In the corrected example, running the “EntryPoint.java” class will execute the main method and print “Hello, World!” to the console as expected.