void isiTabelPekanKlpk() {
        int x = 0;

        Object data[][] = new Object[recordPekanKlpk.size()][2];
        for (pekanKlmpk p : recordPekanKlpk) {
            data[x][0] = p.getPekan();
            data[x][1] = p.getNilai();
            x++;
        }
        String judul[] = {"pekan", "nilai kelompok"};
        tabPekanMhs1.setModel(new DefaultTableModel(data, judul));
        jScrollPane31.setViewportView(tabPekanMhs1);
    }