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POCant display rows in a JTable (Values from Database)
 

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  1. POCant display rows in a JTable (Values from Database)
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    <p>Hello dear programmers,</p> <p>it's my first post and i hope i'm able to describe which kind of problem i have. I'm German, thats why my classnames are in german. I tried to put in some helpfull comments.</p> <p>I'm trying to put the values of a database (called "buchungen") into a JTable inside a JPanel. My JTable shows up but only the headers and no rows.. </p> <p>Here is my class with the JTable inside:</p> <pre><code>public class Verlauf extends SQL{ JTable table = new JTable(); DefaultTableModel model = new DefaultTableModel(); Verlauf(){ removeAll(); try { rs = stmt.executeQuery("SELECT * FROM buchungen WHERE Ausführer = '" + kontoNr + "'"); // kontoNr equals to Ausführer in the database } catch (Exception e) { e.printStackTrace(); } displayData(rs); repaint(); } public void displayData(ResultSet rs) { int i; int count; String a[]; String header[] = {"BuchungsNr","Ausführer","Betrag","Aktion","Empfänger"}; //Table Header Values, change, as your wish count = header.length; //First set the Table header for(i = 0; i &lt; count; i++) { model.addColumn(header[i]); } table.setModel(model); //Represents table Model add(table.getTableHeader(),BorderLayout.NORTH); a = new String[count]; // Adding Database table Data in the JTable try { while (rs.next()) { for(i = 0; i &lt; count; i++) { a[i] = rs.getString(i+1); } model.addRow(a); //Adding the row in table model table.setModel(model); // set the model in jtable } } catch (Exception e) { JOptionPane.showMessageDialog(null, "Exception : "+e, "Error", JOptionPane.ERROR_MESSAGE); } } </code></pre> <p>I got the method for the jtable from a other post which i cant find anymore... I hope someone can help me :)</p> <p>Edit: The connection to my database is made in another class (called SQL) which works fine because i can use it from other classes perfectly in the same way i did here.</p> <p>Greetings Lukas Warsitz</p>
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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