delete

// fungsi hapus data
        try {
            String sql ="delete from mhs where nim='"+txtnim.getText()+"'";
            java.sql.Connection conn=(Connection)Config.configDB();
            java.sql.PreparedStatement pst=conn.prepareStatement(sql);
            pst.execute();
            JOptionPane.showMessageDialog(this, "berhasil di hapus");
        } catch (Exception e) {
            JOptionPane.showMessageDialog(this, e.getMessage());
        }
        load_table();
        kosong();