#Java toString help

1 messages · Page 1 of 1 (latest)

inland fractal
#

Patient.java

public class Patient {
    int id;
    double caffeineLevel;
    
    public Patient(int id, double caffeineLevel) {
        this.id = id;
        this.caffeineLevel = caffeineLevel;
    }
}

PatientManager.java

public class PatientManager {
    Patient[] patients;
    
    public PatientManager(){
        this.patients = new Patient[10];
    }
    
    public int addPatient(Patient patient) {
        for (int i = 0; i < patients.length; i++) {
            if(patients[i] == null) {
                patients[i] = patient;
                return i;
            }
        }
        return -1;
    }
    
    public Patient removePatient(int i) {
        Patient removedPatient = patients[i];
        patients[i] = null;
        return removedPatient;
    }
    
    public void caffeineAbsorbtion() {
        for (int i = 0; i < patients.length; i++) {
            if (patients[i] != null) {
                patients[i].caffeineLevel -= 130;
                if (patients[i].caffeineLevel <= 0)
                    removePatient(i);
            }
        }
    }

// NEED HELP HERE PLEASE //
    public String toString() {
            for (int i = 0; i < patients.length; i++) {
                if (patients[i] == null) {
                    return "Empty";
                }
                else{
                    for (int z = 0; z < patients.length; z++) {
                        while (patients[z] != null) {
                            int id = patients[z].id;
                            double level = patients[z].caffeineLevel;
                            return Integer.toString(id) + " " + Double.toString(level);
                        }
                        
                    }
                }
            }
            return null;
    }
}
sour steppeBOT
#

<@&987246399047479336> please have a look, thanks.

sour steppeBOT
#

While you are waiting for getting help, here are some tips to improve your experience:

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inland fractal
#

PatientTester.java


public class PatientTester {
    public static void main(String[] args) {
        PatientManager PM = new PatientManager();
        System.out.println(PM);
        
        PM.addPatient(new Patient(1, 100));
        PM.addPatient(new Patient(2, 200));
//        PM.addPatient(new Patient(3, 300));
//        PM.addPatient(new Patient(4, 400));
        
        System.out.println(PM);
        
//        PM.caffeineAbsorbtion();
//        
//        System.out.println(PM);
        
    }
}
sour steppeBOT
inland fractal
#

So the only attributes are patient id and caffeine level yes, but my homework assignment in the tester looks like this:
https://i.gyazo.com/67f84fc3f9e2e3a18bc012e04895639c.png

So essentially I need to add 4 different patient objects and print all of them in the format of:
id caffeineLevel

But I can't figure out how to tell the toString method to take in all 4 objects rather just taking in the first one and printing it.

fleet lion
#

the problem is that you instantly return

# 
    public String toString() {
            for (int i = 0; i < patients.length; i++) {
                if (patients[i] == null) {
                    return "Empty"; // returning exits the method
                }
                else{
                    for (int z = 0; z < patients.length; z++) {
                        while (patients[z] != null) {
                            int id = patients[z].id;
                            double level = patients[z].caffeineLevel;
                            return Integer.toString(id) + " " + Double.toString(level); // returning exits the method
                        }
                        
                    }
                }
            }
            return null;
    }
#

you should instead create an empty string and then edit it or even us a string builder

inland fractal
fleet lion
#

maybe like this:

public String toString() {
    String text = "";
    for (int i = 0; i < array.length; i++) {
        text += array[i] + "\n";
    }
    return text;
}