How to add timer to JLabel when a button is clicked?

Question

I am creating a simple stopwatch program with 3 buttons ( Start, Stop and Reset) and a simple JLabel to display the time. I am adding an action listener to the start button so when the button is clicked, the timer starts the clock on the label.

However, when I try to add the timer variable inside the button event, it doesn't allow me to do so. Can anyone suggest what I did wrong or how to improve it?

Code:

public class GuiStopwatch {





    public static void main(String[] args) {
        JFrame frame = new JFrame("Stopwatch");

        frame.setSize(500, 500);
        frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
        frame.setVisible(true);
          JPanel panel = new JPanel();

          panel.setLayout(null);

          JButton Startbtn = new JButton("START");  
          JButton Stopbtn = new JButton("STOP");
          JButton Reset = new JButton("RESET");
          JLabel time = new JLabel("Time shows here");
             panel.add(Startbtn);
             panel.add(Stopbtn);
            panel.add(Reset);
            panel.add(time);
             Startbtn.setBounds(50, 150, 100, 35);
             Stopbtn.setBounds(50, 200, 100, 35);
             Reset.setBounds(50, 250, 100, 35);
             time.setBounds(50, 350, 100, 35);
             time.setBackground(Color.black);
             time.setForeground(Color.red);
             frame.add(panel);


             Startbtn.addActionListener(new ActionListener() {

                @Override
                public void actionPerformed(ActionEvent e) {
                    Timer timer = new Timer(1,new ActionListener() {

                        @Override
                        public void actionPerformed(ActionEvent e) {
                            // TODO Auto-generated method stub

                        }
                    })

                }
            });

EDIT:

The error is it says there is no constructor defined for Timer(int, ActionListener).

@markspace I see. I suppose the actionperformed is not needed when declaring the Timer timer variable? — Lord Jesus, May 16 '18 at 16:10
What error message are you seeing? Post that in your question as an [edit] please. — Hovercraft Full Of Eels, May 16 '18 at 16:11
No I was wrong. The syntax is still too hard to parse (read) with those nested anonymous classes. I'd make separate classes (not anonymous) so that it's easier to read the syntax there. — markspace, May 16 '18 at 16:11
You're importing the wrong Timer class. Not `import java.util.Timer;` but rather `import javax.swing.Timer` — Hovercraft Full Of Eels, May 16 '18 at 16:16
Either that or you have your own class somewhere that you've given the name `Timer` and are confusing the compiler. — Hovercraft Full Of Eels, May 16 '18 at 16:16
What is the purpose of java.util.Timer compared to swing.Timer? — Lord Jesus, May 16 '18 at 16:17
@HovercraftFullOfEels I notcied that I can't use two imports of the Timer you mentioned at the same time. Why is that? Anyway, I imported the wrong Timer . You can post your answer below. — Lord Jesus, May 16 '18 at 16:21
Closed as a duplicate. [Some differences between the two classes](https://stackoverflow.com/questions/15556646/why-are-there-two-timer-classes-in-javaone-under-javax-swing-one-under-java-ut) — Hovercraft Full Of Eels, May 16 '18 at 16:28

How to add timer to JLabel when a button is clicked?

0 Answers0