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Thread: having problem with data structure

  1. #1
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    Default having problem with data structure

    im having problem to solve this question,can someone teach me the code to solve this problem
    java.JPG

    as this is my progress app class

    my code.JPG

    here is my class
    class 1.JPGclass 2.JPG


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    Default Re: having problem with data structure

    Please post your code directly using code or highlight tags which are explained here. The graphics are very hard/impossible to read and the text they contain cannot be copied and pasted into our own work areas.

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    Default Re: having problem with data structure

    public class PatientApp
    {
        public static void main(String[]args)
     
        {
            String patName; 
            String patIC; 
            String treatment; 
            String treatmentDate;
            String patStatus;
     
            ArrayList patientAL =new ArrayList();
            ArrayList childAL=new ArrayList();
     
     
            for(int i=0;i<2;i++)
            {
                patName=JOptionPane.showInputDialog("Patient Name : ");
                patientAL.add(patName);
                patIC=JOptionPane.showInputDialog("Patient IC : ");
                patientAL.add(patIC);
                treatment=JOptionPane.showInputDialog("treatment (extraction, restoration,scaling) : ");
                patientAL.add(treatment);
                treatmentDate=JOptionPane.showInputDialog("Date : ");
                patientAL.add(treatmentDate);
                patStatus=JOptionPane.showInputDialog("status (children or adult): ");
                patientAL.add(patStatus);
     
            }
     
            for(int j=0;j<2;j++)
            {            
               JOptionPane.showInputDialog("Enter patient IC no without(-) : ");
     
     
            }
     
        }
    }

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    Default Re: having problem with data structure

    Progress. Now explain specifically what you need help with. Copy/paste the assignment step(s) you're working on and the code you've written for those parts, any compiler or run time errors you're getting, describe any program behaviors you'd like to change, post sample runs if you can, and ask specific questions.

  5. #5
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    Default Re: having problem with data structure

    this my class
    public class Patient
    {
     
        private String patName; //patient’s name
        private String patIC; //patient’s NRIC/birth cert.
        private String treatment; //type of treatment received:
        private String treatmentDate; //in format dd/mm/yyyy
        private String patStatus; //children or adult
     
        //normal constructor
        public Patient(String name,String IC, String treatmnt,String date, String status)
        {
            patName=name;
            patIC =IC;
            treatment =treatmnt;
            treatmentDate=date;
            patStatus=status;
     
        }
     
     
       //accessor methods
        public String getName()
        { 
            return patName;
        }
     
        public String getIC()
        {
            return patIC;
        }
     
        public String getTreatment()
        {
            return treatment;
        }
     
        public String getTreatmentDate()
        {
            return treatmentDate;
        }
     
        public String getStatus()
        {
            return patStatus;
        }
     
        public void setTreatment(String treatmnt)//mutator method
        {
            treatment=treatmnt;
        } 
     
     
        public String toString()//return string
        {
            String s;
            s="Patient Name : "+patName+"Patient IC : "+patIC+"Treatment : "+treatment+"Date : "+treatmentDate+"Status : "+patStatus;
     
            return s;
     
     
        }
    }

    i having problem to do this
    question.JPG

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    Default Re: having problem with data structure

    In your main method you didn't instantiate the patient class so why you build a class that you are not using?

    If you want to search a patient using patient’s NRIC/birth cert then its better if you go for Hash-map instead of arraylist.
    make patient patient’s NRIC/birth cert as a key for hash-map and value as a patient class object.
    HashMap<String, Patient> patientHashMap = new HashMap<>();

    and then populate the hashmap as
    patientHashMap.put(patIC,new Patient(patName, patIC, treatment, treatmentDate, patStatus));

    i suggest you to use hash-map because it's easy with the hash-map to search using key based criteria.

    if(patientHashMap.containsKey(patIC)){
            	   System.out.println(patientHashMap.get(patIC));
               }
    .

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