update_jam_pada_form

public Menu() {
        initComponents();
        labelTanggal.setText(tanggal);
        setJam();
        //setUndecorated(false);
    }

    public final void setJam(){
    ActionListener taskPerformer = new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent evt) {
                String nol_jam = "", nol_menit = "",nol_detik = "";

                java.util.Date dateTime = new java.util.Date();
                int nilai_jam = dateTime.getHours();
                int nilai_menit = dateTime.getMinutes();
                int nilai_detik = dateTime.getSeconds();

                if(nilai_jam <= 9) nol_jam= "0";
                if(nilai_menit <= 9) nol_menit= "0";
                if(nilai_detik <= 9) nol_detik= "0";

                String jam = nol_jam + Integer.toString(nilai_jam);
                String menit = nol_menit + Integer.toString(nilai_menit);
                String detik = nol_detik + Integer.toString(nilai_detik);

                labelJam.setText(jam+":"+menit+":"+detik+"");
            }
        };
        new Timer(1000, taskPerformer).start();
    }