Thread: Programm does not start. Help Please!

Hey I have written this code:
When I am executing it, I have problems with my main class. What can I do?
(German Student)

Programm should just start the methods in 2 other classes.

ERROR MESSAGE:
"non-static method ende() cannot be referenced from a static context"


---------------------------

 
 
public class Spielsystem {
 
    Spaceship spaceship;
    CPUShip cpuship;
 
    // Konstruktor
    public static void main(String[] args) {
        Spielsystem Schiff = new Spielsystem();
        while ( !ende() ) {
           Spielstand(); 
           Spielrunde();
        }
    }
 
    //ohne void
    public Spielsystem () {
        spaceship = new Spaceship(5000, 50, 200, 120, 50);
        cpuship = new CPUShip (5000, 50, 200, 120, 50);
 
    }
 
    // Aufrufen der Spaceship-Klasse, 1.Aktion des Spielers, 2.Aktion von CPU (Random)
    public void Spielstand() {
        System.out.println("Verfügbares Geld: " + spaceship.getMoney());
        System.out.println("Besatzungsmitglieder: " + spaceship.getPeople());
        System.out.println("Vorhandene Nahrung: " + spaceship.getFood());
        System.out.println("Treibstoff: " + spaceship.getFuel());
        System.out.println("geladene Ladung: " + spaceship.getLadung());
 
        System.out.println("--------------------------------------------");
 
        System.out.println("CPU Verfügbares Geld: " + cpuship.getMoney());
        System.out.println("CPU Besatzungsmitglieder: " + cpuship.getPeople());
        System.out.println("CPU Vorhandene Nahrung: " + cpuship.getFood());
        System.out.println("CPU Treibstoff: " + cpuship.getFuel());
        System.out.println("CPU geladene Ladung: " + cpuship.getLadung());
    }
 
    public void Spielrunde() {
        //Führt Runde des Spielers mit Klasse "Spaceship" durch, danach "Random"-Events der "CPU"
        spaceship.spielzug();
        cpuship.spielzug();
    }
    //boolean
    public boolean ende() {
        // CPU-Schiff und SpielerSchiff checken
        return (spaceship.leer() || cpuship.leer());
    }
    //String[] args
    //static void
 
}

------------------------------

Thanks! will do that!

Do I have to put this in the method "ende" itself?
Which instances should I put in there?

ende() is in the same class as the "Error"-Main Class. The Code creates a "new Spielsystem" of that class.
Where should I enter the data? I assume it is

 
 
 public boolean ende() {
        // CPU-Schiff und SpielerSchiff checken
        Spielsystem.Spielstand();
        Spielsystem.Spielrunde();
        return (spaceship.leer() || cpuship.leer());

Originally Posted by Norm

The non-static method ende() requires an instance of the class to reference it.
referenceToClassObject.theMethod();

How can I programm this? Didn't I created a new instance with "new Spielsystem();"?

The Method "Ende" is in the Same class in which there is the "main" method, that caused the syntax error.
If I write

 public static void main(String[] args) {
        Spielsystem Schiff = new Spielsystem();
        while ( !Spielsystem.ende() ) {
           Spielsystem.Spielstand(); 
           Spielsystem.Spielrunde();
        }
    }

like you told me, the error still occurs.