JAVASCRIPT

datatables add row

const table = $("#yourTable").DataTable();

table.row.add( /* array or object */).draw();

// or using tr
const tr = $("<tr><td>1</td><td>2</td></tr>");
table.row.add(tr[0]).draw();

// you must call draw() to see your changes

Add data or add row in JTable java

private void jButton1ActionPerformed(java.awt.event.ActionEvent) {
    String data1 = something1.getSomething();
    String data2 = something2.getSomething();
    String data3 = something3.getSomething();
    String data4 = something4.getSomething();

    Object[] row = { data1, data2, data3, data4 };

    DefaultTableModel model = (DefaultTableModel) jTable1.getModel();

    model.addRow(row);

    // clear the entries.
}

datatables add row with id

const t = $('#myTable').DataTable();
t.row.add( [ ... ] ).node().id = 'myId';
t.draw( false );