将 object 存储在对象数组中

Question

I'm trying to link the trainee object with the training session object, but this error shows up: TrainingSession cannot be converted to TrainingSession[] (it's in the last line).

I can't use an array list or anything similar because I have to follow the UML diagram in the assignment. I have used the following variables sessionName , traineeNo , and sessionNo to know which trainee and training session I'm dealing with.

public class Trainee extends Person {

    private TrainingSession [] ST;

    public TrainingSession [] getST() {
        return ST;
    }

    public void setST(TrainingSession [] ST) {
        this.ST = ST;
    }
}

public class TrainingSession {

    private int trainingSessionID;

    public int getTrainingSessionID() {
        return trainingSessionID;
    }

    public void setTrainingSessionID(int trainingSessionID) {
        this.trainingSessionID = trainingSessionID;
    }
}

public class TMS2 {

    public static void main(String[] args) 
            throws FileNotFoundException, ParseException {

        File file = new File("input.txt");
        Scanner read = new Scanner(file);
        Trainee [] trainee = new Trainee[15];

        int traineeID = read.nextInt();
        int trainingSessionID = read.nextInt();

        String sessionName = TrainingSession(trainingSession, trainingSessionID);
        int traineeNo = TraineeNo( trainee,  traineeID);
        int sessionNo = SessionNo( trainingSession,  sessionName);

        trainee[traineeNo].setST(trainingSession[sessionNo]);
    }
}

Answer 1

trainingSession[sessionNo] is a TrainingSession object, not an array.

Perhaps you're looking for something like...

trainee[traineeNo].setST(new TrainingSession[] { trainingSession[sessionNo]});