import java.awt.GraphicsEnvironment;

public class Decapite{
    private boolean isHeadless;
    private boolean isHeadlessInstance;
    private GraphicsEnvironment environnementGraphique;

    public Decapite(){
        this.environnementGraphique = GraphicsEnvironment.getLocalGraphicsEnvironment();
        this.isHeadless = environnementGraphique.isHeadless();
        this.isHeadlessInstance = environnementGraphique.isHeadlessInstance();
    }

    @Override
    public String toString(){
        String isHeadlessString = this.isHeadless ? "oui" : "non";
        String isHeadlessInstanceString = this.isHeadlessInstance ? "oui" : "non";

        return "isHeadless dit :      " + isHeadlessString + "\nisHeadlessInstance dit :" + isHeadlessInstanceString;
    } 

    public static void main(String[] args){
        Decapite test = new Decapite();
        test.toString();
    }
}