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Thread: Help on this program

  1. #1
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    Join Date
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    Default Help on this program

    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;

    public class Timer implements ActionListener
    {
    public static int time;

    //containers
    private JFrame f;
    private JButton start, stop, reset;

    //components
    private JLabel hour, min, sec;
    private JTextField tf1, tf2, tf3;
    private JPanel p1, p2;

    public Timer()
    {
    //containers
    f = new JFrame("Rad's Timer");

    p1 = new JPanel();
    p2 = new JPanel();

    //components
    start = new JButton("Start");
    stop = new JButton("Stop");
    reset = new JButton("Reset");

    hour = new JLabel("Hour: ");
    min = new JLabel("Minute: ");
    sec = new JLabel("Second: ");

    tf1 = new JTextField("0", 7);
    tf2 = new JTextField("0", 7);
    tf3 = new JTextField("0", 7);
    }

    public void launchFrame()
    {
    p1.add(hour);
    p1.add(tf1);
    p1.add(min);
    p1.add(tf2);
    p1.add(sec);
    p1.add(tf3);
    p2.add(start);
    p2.add(stop);
    p2.add(reset);

    p2.setLayout(new GridLayout());

    f.setLayout(new BorderLayout(2,1));

    f.add(p1, BorderLayout.NORTH);
    f.add(p2, BorderLayout.SOUTH);

    f.pack();
    f.setVisible(true);

    //event handlers registration
    start.addActionListener(this);
    reset.addActionListener(this);

    f.addWindowListener(new MyCloseButtonHandler());
    }

    public void actionPerformed(ActionEvent ae)
    {
    Object source = ae.getSource();
    int num1, num2, num3;

    if (tf1.getText() != null && tf2.getText() != null && tf3.getText() != null)
    {
    /*num1 = Integer.parseInt(tf1.getText());
    num2 = Integer.parseInt(tf2.getText());*/
    num3 = Integer.parseInt(tf3.getText());

    if (source == start)
    {
    for (int i = time; i >= 0; i--)
    {
    try
    {
    Thread.sleep(1000);
    }
    catch (InterruptedException x) {}
    tf3.setText(Integer.toString(num3));
    }
    }
    if (source == reset)
    {
    tf1.setText("0");
    tf2.setText("0");
    tf3.setText("0");
    }
    }
    }

    /*public void count()
    {
    for (int i = time; i >= 0; i--)
    {
    while (i > 0)
    {
    try
    {
    Thread.sleep(1000);
    }
    catch (InterruptedException x) {}
    tf3.setText("Time: " + i--);
    }
    }
    }*/

    private class MyCloseButtonHandler extends WindowAdapter
    {
    public void windowClosing(WindowEvent we)
    {
    System.exit(0);
    }
    }

    public static void main(String args[])
    {
    Timer t = new Timer();
    t.launchFrame();
    }
    }

    I need help getting the start button to work on my code. so when you click start, the number you input on TextField for seconds will start a countdown.


  2. #2
    Super Moderator
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    Default Re: Help on this program

    Welcome to the forum! Please read this topic to learn how to post code correctly and other useful info for new members.

    Too much unformatted code posted incorrectly. You should be able to edit your post to add code/highlight tags as described in the link I've provided. The Edit Post control is on the frame at the bottom of the existing post. If that eludes you, then add a reply and post the code correctly there.

    Also describe what currently happens when the Start button is pressed. Nothing? An error occurs? If an error, please post that too.

    Recommendation: Don't give your classes the same name as existing Java classes.

  3. The Following User Says Thank You to GregBrannon For This Useful Post:

    rad1996 (March 23rd, 2014)

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