Student.java

package hfdst3;

interface CallBackInterface { // added
    char getGrade();
    int getEncryptedNaam();
}

public class Student {
    protected String naam;
    protected int score;
    public Student(String naam, int score){
        this.naam = naam;
        this.score = score;
    }
    public String getNaam(){
        return naam;
    }
    public int getScore(){
        return score;
    }
    /*
    public char getGrade(){
        return score >= 12 ? 'A' : score < 10 ? 'C' : 'B';
    }
    public int getEncryptedNaam(){
        int e = 0;
        for(int i=0;i<naam.length();i++){
            e += (byte)(naam.charAt(i))*10;
        }
        return e;
    }
    */
    // // // //
    public CallBackInterface getCallBackReferentie() {
        return new CallBackInterface() {
            public char getGrade() {
                return score >= 12 ? 'A' : score < 10 ? 'C' : 'B';
            }
            public int getEncryptedNaam(){
                int e = 0;
                for(int i=0;i<naam.length();i++){
                    e += (byte)(naam.charAt(i))*10;
                }
                return e;
            }
        };
    }
}

class ScoreLijst { // Student -> CallBackInterface
    protected CallBackInterface[] student;
    protected String vak;
    public ScoreLijst(CallBackInterface[] student,String vak) {
        this.student = student;
        this.vak = vak;
    }
    public String toString(){
        String r = this.vak+"\n";
        for(CallBackInterface i:student){
            r += i.getEncryptedNaam() + ":" + i.getGrade() +"\n";
        }
        return r;
    }
}

class Test {
    public static void main(String[] args){
        Student an = new Student("An", 9);
        Student birgit = new Student("Birgit", 16);
        Student carl = new Student("Carl", 6);
        Student dorien = new Student("Dorien", 11);
        // changed:
        ScoreLijst l = new ScoreLijst(new CallBackInterface[]{an.getCallBackReferentie(), birgit.getCallBackReferentie(), carl.getCallBackReferentie(), dorien.getCallBackReferentie()}, "Python");
        System.out.println(l);

    }
}