Swing Timer

//You would want something like this:
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
    jProgressBar1.setValue(0);
    int viewsCount = Integer.parseInt(jTextField2.getText());
    int i=100;
    jLabel3.setText(String.valueOf(i)+"done out of "+String.valueOf(viewsCount)+" for "+jTextField1.getText());

    int delay = 1000;
    Timer timer = new Timer(delay, new ActionListener(){
        @Override
        public void actionPerformed(ActionEvent e) {
            jProgressBar1.setValue(50);
        }
    });
    timer.setRepeats(false);
    timer.start();
}