Thank you for the fast response, but do you get 100/100 in judge? I tried your code and i found my mistakes, but still get 0 points in judge with both solutions. I start to think there is something wrong with judge.

Sorry, didn't try it out. Assumed that it was correct - could be that there is an issue with judge if the exercise has been updated. Give it a shot with the following:

Main.java:

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Arrays;

public class Main {
    public static void main(String[] args) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException, IOException {

        Class ref = Reflection.class;

        System.out.println(ref);

        Class superClass = Reflection.class.getSuperclass();

        System.out.println(superClass);

        Class[] interfaces = ref.getInterfaces();

        Arrays.stream(interfaces).forEach(System.out::println);

        Object reflection = ref.getDeclaredConstructor().newInstance();

        System.out.println(reflection);

    }
}

GettersAndSetters.java:

import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import java.util.Arrays;
import java.util.Comparator;

public class GettersAndSetters {
    public static void main(String[] args) {

        Class ref = Reflection.class;

        Method[] declaredMethods = ref.getDeclaredMethods();

        declaredMethods = Arrays.stream(declaredMethods).sorted(Comparator.comparing(Method::getName)).toArray(Method[]::new);

        for (Method declaredMethod : declaredMethods) {
            String name = declaredMethod.getName();

            if (name.contains("get")) {
                System.out.println(String.format("%s will return class %s", name, declaredMethod.getReturnType().getName()));
            }

        }
        for (Method declaredMethod : declaredMethods) {
            String name = declaredMethod.getName();

            if (name.contains("set")) {

                System.out.print(String.format("%s and will set field of class ", name));

                Parameter[] parameterTypes = declaredMethod.getParameters();

                for (int i = 0; i < parameterTypes.length; i++) {
                    System.out.print(parameterTypes[i].getType().getName() + " ");
                }
                System.out.println();
            }

        }
    }
}

Reflection.java:

import java.io.Serializable;

public class Reflection implements Serializable {

    private static final String nickName = "Pinguin";
    public String name;
    protected String webAddress;
    String email;
    private int zip;

    public Reflection() {
        this.setName("Java");
        this.setWebAddress("oracle.com");
        this.setEmail("mail@oracle.com");
        this.setZip(1407);
    }

    private Reflection(String name, String webAddress, String email) {
        this.setName(name);
        this.setWebAddress(webAddress);
        this.setEmail(email);
        this.setZip(2300);
    }

    protected Reflection(String name, String webAddress, String email, int zip) {
        this.setName(name);
        this.setWebAddress(webAddress);
        this.setEmail(email);
        this.setZip(2300);
    }

    public final String getName() {
        return name;
    }

    private void setName(String name) {
        this.name = name;
    }

    protected String getWebAddress() {
        return webAddress;
    }

    private void setWebAddress(String webAddress) {
        this.webAddress = webAddress;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    protected final int getZip() {
        return zip;
    }

    private void setZip(int zip) {
        this.zip = zip;
    }

    public String toString() {
        String result = "Name: " + getName() + "\n";
        result += "WebAddress: " + getWebAddress() + "\n";
        result += "email: " + getEmail() + "\n";
        result += "zip: " + getZip() + "\n";
        return result;
    }
}

It worked! Thank you again!