I am trying to display data on the jTable, but it doesn’t show up. I believe the main problem is in setObj() method (at the end of the code) that is called from a different JFrameForm (Database Extraction) with the appropriate input. I am able to print the correct number of rows but the table is not displaying the data.
This is the code that passes the data to the DriverList JFrameForm
//Database Extraction
DriverList DList = new DriverList();
DList.setObj(driver.getName() , driver.getTeam() , driver.getNum() ,driver.getNation() , driver.getAI());
This the JFrameForm with the table that is supposed to display the data. In the setOBJ() method I tried to print the number of rows in the model and I was able to get the correct answer of 20. But the Table is still empty.
// DriverList
import javax.swing.table.DefaultTableModel;
public class DriverList extends javax.swing.JFrame {
public DriverList() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
},
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
}
));
jTable1.addFocusListener(new java.awt.event.FocusAdapter() {
public void focusGained(java.awt.event.FocusEvent evt) {
jTable1FocusGained(evt);
}
});
jScrollPane1.setViewportView(jTable1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(94, 94, 94)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 375, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(142, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(54, 54, 54)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 275, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(117, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jTable1FocusGained(java.awt.event.FocusEvent evt) {
}
public static void main(String args[]) {
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(DriverList.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(DriverList.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(DriverList.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(DriverList.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
java.awt.EventQueue.invokeLater(() -> {
new DriverList().setVisible(true);
});
}
public void setObj(Object name, Object team, Object num, Object nation, Object ai) {
String[] cnames = {"Name","Team","Number","Nation","AI"};
DefaultTableModel model = new DefaultTableModel(cnames,0);
String[] NAME = (String[]) name;
model.setRowCount(0);
byte[] TID = (byte[]) team;
byte[] NUM = (byte[]) num;
byte[] NATION = (byte[]) nation;
byte[] AI = (byte[]) ai;
for(int i = 0; i<20 ; i++){
Object[] row = {NAME[i],TID[i],NUM[i],NATION[i],AI[i]};
model.insertRow(i, row);
}
jTable1.setModel(model);
System.out.println("total rows"+model.getRowCount());
}
// Variables declaration - do not modify
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
// End of variables declaration
}
Anonymous Asked question May 14, 2021
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