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POLoading from a database to a jlist brings errors
 

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  1. POLoading from a database to a jlist brings errors
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    <p>I have created a database and every entry from the JList will be added to a table in the database. This work perfectly, but my next task is to get whatever is in the database to load to the JList. I have a function created within the button but it brings up errors. I'm struggling with how to fix this so I hope somebody can resolve it.</p> <p>Thanks</p> <p>Here is my code:</p> <pre><code>JButton btnDb1 = new JButton("J"); btnDb1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { try { ResultSet rs = st.executeQuery("SELECT * FROM patient"); while (rs.next()) { Patient patient = new Patient(patientname, patientaddress, patientphone, patientid); patient.setName(rs.getString("patientname")); patient.setAddress(rs.getString("patientaddress")); patient.setPhoneNum(rs.getString("patientphone")); patient.setID(rs.getInt("patientid")); MainDentist.model.addElement(patient); } } catch (Exception e) { System.out.println(" Error "); } } }); btnDb1.setBounds(200, 393, 120, 23); contentPane.add(btnDb1); </code></pre> <p>Here is my patient class:</p> <pre><code>public class Patient { public String patientName; public String patientAddress; public String patientPhone; public int patientID; public Patient(String patientname, String patientaddress, String patientphone,int patientid){ patientName = patientname; patientAddress = patientaddress; patientPhone = patientphone; patientID = patientid; } public String setName(String patientname){ return patientName = patientname; } public String getName(){ return patientName; } public String setAddress(String patientaddress){ return patientAddress = patientaddress; } public String getAddress(){ return patientAddress; } public String setPhoneNum(String patientphone){ return patientPhone = patientphone; } public String getPhoneNum(){ return patientPhone; } public int setID(int patientid){ return patientID = patientid; } public int getID(){ return patientID; } public String toString() { // Printing the patient's details to the scroll pane return "Patient Name: " + patientName + ", PatientAddress: " + patientAddress + ", PatientPhone: " + patientPhone + ", patientID: " + patientID +"" ; } } </code></pre>
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    1. PTQuestion
    1. USGameDroids
    1. USShane Reen
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      1. POLoading from a database to a jlist brings errors
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    1. COWhat about this line, where do the parameters for creating the Patient come from: `Patient patient = new Patient(patientname, patientaddress, patientphone, patientid);` and why don't you just read them directly into the constructor: `Patient patient = new Patient(rs.getString("patientname"), rs.getString("patientaddress"), rs.getString("patientphone"), rs.getInt("patientid"));` ? Anyway, what kind of errors are you getting exactly?
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      1. POLoading from a database to a jlist brings errors
      1. USGameDroids
    2. COFirst thing to do: replace `System.out.println(" Error ")` by `e.printStackTrace()`, or even `throw new RuntimeException(e)`, then read the error message you get instead of ignoring it and then wondering what the problem might be.
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      1. USJB Nizet
    3. COIt says that st is not declared in the following line: ResultSet rs = st.executeQuery("SELECT * FROM patient");
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      1. POLoading from a database to a jlist brings errors
      1. USShane Reen
 

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