JTable add row content disappeared only blank rows added

Check if the table render is configured correctly.

        // JTable
DefaultTableModel dtModel = new DefaultTableModel();
dtModel.addColumn(“No.”);
dtModel.addColumn(“Name”);

JTable mlTable = new JTable(dtModel);
mlTable.setDefaultRenderer(Object.class, new DefaultTableCellRenderer()); //make sure the render is an implemented class and good to use

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