private void startJamJButtonActionPerformed(java.awt.event.ActionEvent evt) {
        if (startJamJButton.getText().equalsIgnoreCase("Start Jam")) {
            jamTimeJTextField.setText("Jam #" + jamNum + "     2:00");
            startJamJButton.setText("End Jam");
            doWork_startJam = true;
        } else if (startJamJButton.getText().equalsIgnoreCase("End Jam")) {
            startJamJButton.setText("Start Jam");
            firstTime_startJam = false;
            jamTimeJTextField.setText("Jam #" + jamNum + "     0:30");
        }

        ActionListener taskPerformer = new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if (!doWork_startJam) {
                    return;
                }
                String initial = jamTimeJTextField.getText();
                String[] time = initial.split(":"); // 2:00
                initial = initial.substring(0, initial.length() - 4);

                int min = Integer.parseInt(time[0].substring(time[0].length() - 1)); // Jam #     2
                int sec = Integer.parseInt(time[1]);
                if (sec == 00) {
                    min--;
                    sec = 59;
                } else {
                    sec--;
                }
                if (sec < 10) {
                    jamTimeJTextField.setText(initial + min + ":0" + sec);
                } else {
                    jamTimeJTextField.setText(initial + min + ":" + sec);
                }

                if (min == 0 && sec == 0) {
                    jamNum++;
                    firstTime_startJam = false;
                    doWork_startJam = false;
                    startJamJButton.setText("Start Jam");
                }
            }
        };

        Timer jamTimer = new Timer(startJamSpeed, taskPerformer);
        if (firstTime_startJam) {
            jamTimer.start();
        }
    }


private void startJButtonActionPerformed(java.awt.event.ActionEvent evt) {

        if (startJButton.getText().equalsIgnoreCase("Start")) {
            if (timerJTextField.getText().equals("0:00"))
                timerJTextField.setText("20:00");
            startJButton.setText("Pause");
            doWork_start = true;
        } else if (startJButton.getText().equalsIgnoreCase("Pause")) {
            startJButton.setText("Start");
            firstTime_start = false;
            doWork_start = false;
        }

        ActionListener taskPerformer = new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if (!doWork_start) {
                    return;
                }
                String initial = timerJTextField.getText();
                String[] time = initial.split(":"); // 20:00

                int min = Integer.parseInt(time[0]); // 20
                int sec = Integer.parseInt(time[1]); // 00
                if (sec == 00) {
                    min--;
                    sec = 59;
                } else {
                    sec--;
                }
                if (sec < 10) {
                    timerJTextField.setText(min + ":0" + sec);
                } else {
                    timerJTextField.setText(min + ":" + sec);
                }

                if (min == 0 && sec == 0) {
                    firstTime_start = false;
                    doWork_start = false;
                    startJButton.setText("Start");
                }
            }
        };

        Timer startTimer = new Timer(startSpeed, taskPerformer);
        if (firstTime_start) {
            startTimer.start();
        }

    }