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Thread: Code is running in multi-threading but it is neither pausing nor resuming..........

  1. #1
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    Smile Code is running in multi-threading but it is neither pausing nor resuming..........

    I have created a JFrame here and you will also see JPanel and JLabel. I have also added two JButton "Pause" and "Resume" over there.

    What I am trying to do is to pause and resume a child thread using JButtons, the program is running fine without any warning or errors, however, child thread is not pausing. The functions executes but it is not pausing the thread.

    I have attached two text files. All the functions are executing in "Main.java" file and "child thread" code is written child_1.java.

    Looking for quick help !!
    Attached Files Attached Files


  2. #2
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    Default Re: Code is running in multi-threading but it is neither pausing nor resuming..........

    Please post any code you are having problems with on the forum.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Code is running in multi-threading but it is neither pausing nor resuming..........

    I have already attached the files in 1st post, the name of the files are child_1.txt and Main.txt ........

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    Default Re: Code is running in multi-threading but it is neither pausing nor resuming..........

    Post the code in the thread, not as links.
    Be sure to wrap the code in code tags.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Code is running in multi-threading but it is neither pausing nor resuming..........

    <code>
    public class child_1 implements Runnable {
    Thread t;
    Main main;
    boolean Flag;

    child_1() {
    System.out.println("Child Thread 1: No Parameter");
    }

    child_1(Main main) {
    this.main = main;
    t = new Thread(this, "child_1");
    System.out.println("Child 1 Started");
    t.start();
    Flag = false;
    }

    synchronized public void run() {
    int k = 0;
    try {
    for (int i = 0; i < 30; i++) {
    main.label_1.setText(k + "");
    k = k + 1;
    Thread.sleep(1000);

    synchronized (this) {
    while (Flag) {
    wait();
    }
    }// /synchronized
    }// for
    }// try
    catch (InterruptedException e) {
    System.out.println("Child interrupted." + e);
    }// catch
    System.out.println("Exiting child thread 1 =>" + k);
    }// run

    synchronized void mysuspend() {
    Flag = true;
    System.out.println("Thread 1 Suspend !!");
    }

    synchronized void myresume() {
    Flag = false;
    notify();
    System.out.println("Thread 1 resumed !!");
    }
    }
    </code>
    ################################################## #######
    <code>
    import javax.swing.*;
    import java.awt.event.*;
    import java.awt.Color;

    public class Main implements ActionListener {

    public JFrame frame;
    public JLabel label_1;
    public JPanel titlePanel_1;
    public JButton Pause_1;
    public JButton Resume_1;

    child_1 c1;

    Main() {
    frame = new JFrame("Frame Counter");
    frame.setVisible(1 == 1);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOS E);
    frame.setSize(800, 500);
    frame.setLocation(520, 120);
    frame.setLayout(null);

    label_1 = new JLabel("My 1st Label");
    // label_1.setBounds(20, 20, 190, 30);
    // frame.add(label_1);

    titlePanel_1 = new JPanel();
    titlePanel_1.setBounds(20, 20, 200, 50);
    titlePanel_1.add(label_1);
    frame.add(titlePanel_1);
    titlePanel_1.setBackground(new Color(176, 200, 150));

    Pause_1 = new JButton("Pause");
    Pause_1.setBounds(325, 20, 100, 50);
    frame.add(Pause_1);
    Pause_1.addActionListener(this);

    Resume_1 = new JButton("Resume");
    Resume_1.setBounds(500, 20, 100, 50);
    frame.add(Resume_1);
    Resume_1.addActionListener(this);

    c1 = new child_1();

    }

    public void actionPerformed(ActionEvent ae) {
    String button = ae.getActionCommand();

    if (button.equalsIgnoreCase("Pause")) {
    try{c1.mysuspend();System.out.println("Button you Pressed==>" + button);}
    catch(Exception e){ System.out.println("Child interrupted." + e);}
    }
    if (button.equalsIgnoreCase("Resume")) {
    try{c1.myresume();System.out.println("Button you Pressed==>" + button);}
    catch(Exception e){ System.out.println("Child interrupted." + e);}
    }

    }

    public static void main(String args[]) {

    Thread t1;
    Runnable run1;
    Main main = new Main();

    run1 = new child_1(main);
    t1 = new Thread(run1);

    }
    }

    </code>

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    Default Re: Code is running in multi-threading but it is neither pausing nor resuming..........

    Please edit your post and wrap your code with code tags:
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Code is running in multi-threading but it is neither pausing nor resuming..........

    I have updated my post..........

  8. #8
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    Default How to pause thread using JButton

    I have updated my post again, I dont know how to go further..............

  9. #9
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    Default Re: Code is running in multi-threading but it is neither pausing nor resuming..........

    Did you look at it to see that it was correctly formatted?
    It should look like this
         public Scanner(Object o) {
            if (myScnr == null) {           //   Put responses here
               myScnr = new java.util.Scanner("1375 1.175 7 1 No\n");
            }
         }
         public Scanner(File f) throws FileNotFoundException {
           if(!f.exists())
              throw new FileNotFoundException(f.getName()); 
           //?????
           System.out.println(">>> No Scanner code for file: " + f);
         }


    --- Update ---

    Quote Originally Posted by pawan4angel View Post
    I am trying to pause and resume child thread using two JButtons on JFrame, looking for some help ...........

    There will be a main thread and one child thread........
    Please only start One thread per topic. Threads merged.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Code is running in multi-threading but it is neither pausing nor resuming..........

    I did not get it

  11. #11
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    Default Re: Code is running in multi-threading but it is neither pausing nor resuming..........

    I did not get it
    Please explain what "did not get it" means.
    If you don't understand my answer, don't ignore it, ask a question.

  12. #12
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    Default Re: Code is running in multi-threading but it is neither pausing nor resuming..........

    leave it, I solved that problem at my own...............thanks for trying here..............

  13. #13
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    Default Re: Code is running in multi-threading but it is neither pausing nor resuming..........

    Please mark this thread as solved.
    If you don't understand my answer, don't ignore it, ask a question.

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