Creating the First Entry Point

Note: This GIF is already outdated, but it is still a good example.

1. In your main method run Starter#start:

   public class MyMain {
       public static void main(String[] args) throws Exception {
           Starter.start(MyMain.class, args)
       }
   }
   

2. Create a method with any named annotated by @Entrypoint:

   @Entrypoint
   public void run() {
       System.out.println("Hello World!");
   }
   

3. Run the application:

   Hello World!
   

4. Now let's create even more entry points:

   @Entrypoint("Hello World")
   public void runHelloWorld() {
       System.out.println("Hello World!");
   } 
   
   @Entrypoint("Joke")
   public void runJoke() {
       System.out.println("Why did the programmier quit his job? Because he didn't get arrays.");
   } 
   

5. If the application is now run again, we will be asked at startup which entrypoint we want to start:

   1. GettingStarted::Hello World@runHelloWorld ()
   2. GettingStarted::Joke@runJoke ()
   🪄 Select Method to run [1-2/{name}]: runJoke
   
   Why did the programmier quit his job? Because he didn't get arrays.
   

Attributes for @Entrypoint

@Entrypoint(value = "xyz") // value: display name of the entrypoint
@Entrypoint(loop = true) // loop: true = run the entrypoint again after it has finished
@Entrypoint(stopwatch = true) // stopwatch: true = print the time it took to run the entrypoint
@Entrypoint(verbose = true) // verbose: true = print debugging information

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Last update: 2022-03-15