In this Java Tutorial we will see How To Populate And Delete JTabe Content In Java Using NetBeans .

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Project Source Code:

import javax.swing.table.DefaultTableModel;

/**
 *
 * @author 1BestCsharp
 */
public class JTable_Load_Clear_Data extends javax.swing.JFrame {

    /**
     * Creates new form JTable_Load_Clear_Data
     */
    public JTable_Load_Clear_Data() {
        initComponents();
        ShowData();
    }
   
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jButtonLoad = new javax.swing.JButton();
        jButtonClear = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {

            }
        ));
        jScrollPane1.setViewportView(jTable1);

        jButtonLoad.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
        jButtonLoad.setText("Load");
        jButtonLoad.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButtonLoadActionPerformed(evt);
            }
        });

        jButtonClear.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
        jButtonClear.setText("Clear");
        jButtonClear.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButtonClearActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jButtonLoad, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jButtonClear, javax.swing.GroupLayout.DEFAULT_SIZE, 93, Short.MAX_VALUE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 452, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 312, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(95, 95, 95)
                        .addComponent(jButtonLoad, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(18, 18, 18)
                        .addComponent(jButtonClear, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(14, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    public void ShowData()
    {
        
        DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
        
        String[] cols = {"Id","First Name","Last Name","Age"};
        String[][] data = { 
                            {"1", "FN1","LN1","10"},
                            {"2", "FN1","LN1","15"},
                            {"3", "FN1","LN1","20"},
                            {"4", "FN1","LN1","25"},
                            {"5", "FN1","LN1","30"},
                            {"6", "FN1","LN1","35"},
                            {"7", "FN1","LN1","40"},
                            {"8", "FN1","LN1","45"},
                            {"9", "FN1","LN1","50"},
                            {"10", "FN1","LN1","60"}
                          };
        
        model.setDataVector(data, cols);
        
        
    }
    
    private void jButtonLoadActionPerformed(java.awt.event.ActionEvent evt) {                                            
       
        ShowData();
        
    }                                           

    private void jButtonClearActionPerformed(java.awt.event.ActionEvent evt) {                                             
        jTable1.setModel(new DefaultTableModel(null,new String[]{"Id","First Name","Last Name","Age"}));
        
    }                                            

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {

        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(JTable_Load_Clear_Data.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(JTable_Load_Clear_Data.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(JTable_Load_Clear_Data.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(JTable_Load_Clear_Data.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new JTable_Load_Clear_Data().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButtonClear;
    private javax.swing.JButton jButtonLoad;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable jTable1;
    // End of variables declaration                   
}

#java