interface K {
    String r();
}
interface L {
    String r();
}
@FunctionalInterface
interface Q extends K, L { 
    
}

interface Function {
    public abstract long f(int x, int y);
}

public class Lambda {

    public void calc(Function f, int a, int b) {
        System.out.println(f.f(a, a));
        System.out.println(f.f(a, b));
        System.out.println(f.f(b, a));
        System.out.println(f.f(b, b));
    }
    
    public void out(Q out) {
        System.out.println(out.r());
    }
    
    public static void main(String[] args)  {
        Lambda lamm = new Lambda();
        try {
            lamm.f();
            System.out.println("Passt.");
        } catch (ArithmeticException e) {
            System.out.println("Fehler-123");
        } catch (Exception e) {
            
        }
        
        /*
        Function f1 = (int a, int b) -> { return a - b; };
        Function f2 = (a, b) -> a / b;;
        lamm.calc(f1, 0, 0);
        
        lamm.out(() -> "a");*/
    }
    
    public void f() throws Exception {
        System.out.println("Draußen-1");
        int x = 5 / 0;
        System.out.println("Draußen-2");
    }
    
    public int g() {
        return g();
    }

}

class MeineException extends InterruptedException {
    
}