按照如下方法定义一个表格，我该如何动态的修改表格（如添加行和列)
private javax.swing.JTable detailTable;
detailTable.setModel(new javax.swing.table.DefaultTableModel(
        new Object [][] {
            
        },
        new String [] {
            "序号", "IP地址", "端口", "描述"
        }
        ) {
            Class[] types = new Class [] {
                java.lang.Integer.class, java.lang.String.class, java.lang.Integer.class, java.lang.String.class
            };
            boolean[] canEdit = new boolean [] {
                false, false, false, false
            };
            
            public Class getColumnClass(int columnIndex) {
                return types [columnIndex];
            }
            
            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        detailTable.setFont(new java.awt.Font("Dialog", 0, 11));
        detailTable.setEditingColumn(0);
        detailTable.setPreferredSize(new java.awt.Dimension(300, 0));
        detailTable.setMaximumSize(new java.awt.Dimension(2147483647, 0));
        detailTable.setEditingRow(0);
        detailTable.setMinimumSize(new java.awt.Dimension(60, 0));
        jScrollPane2.setViewportView(detailTable); 

setModel(....);