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This is my jTable private JTable getJTable() { String[] colName = { "Name", "Email", "Contact No. 1", "Contact No. 2", "Group", "" }; if (jTable == null) { jTable = new JTable() { public boolean isCellEditable(int nRow, int nCol) { return false; } }; } DefaultTableModel contactTableModel = (DefaultTableModel) jTable .getModel(); contactTableModel.setColumnIdentifiers(colName); jTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); return jTable; } I will call this method to retrieve the data from database and put it into table model public void setUpTableData() { DefaultTableModel tableModel = (DefaultTableModel) jTable.getModel(); ArrayList<Contact> list = new ArrayList<Contact>(); if (!con.equals("")) list = sql.getContactListsByGroup(con); else list = sql.getContactLists(); for (int i = 0; i < list.size(); i++) { String[] data = new String[7]; data[0] = list.get(i).getName(); data[1] = list.get(i).getEmail(); data[2] = list.get(i).getPhone1(); data[3] = list.get(i).getPhone2(); data[4] = list.get(i).getGroup(); data[5] = list.get(i).getId(); tableModel.addRow(data); } jTable.setModel(tableModel); } Currently I was using this method to refresh the table after updating the table data. I will first clear the table DefaultTableModel tableModel = (DefaultTableModel) jTable.getModel(); tableModel.setRowCount(0); and then restructure the table model again so it will refresh the jTable. But I was thinking is there any best practices or better way to do that?

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