Source Code : Thread accuracy: Swing and threads

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Thread accuracy: Swing and threads

  

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.text.DecimalFormat;

import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

public class SecondCounterMain extends JPanel {
  private SecondCounter sc = new SecondCounter();

  private JButton startB = new JButton("Start");

  private JButton stopB = new JButton("Stop");

  public SecondCounterMain() {
    stopB.setEnabled(false); 
    startB.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        startB.setEnabled(false);

        Thread counterThread = new Thread(sc, "Counter");
        counterThread.start();

        stopB.setEnabled(true);
        stopB.requestFocus();
      }
    });

    stopB.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        stopB.setEnabled(false);
        sc.stopClock();
        startB.setEnabled(true);
        startB.requestFocus();
      }
    });

    JPanel innerButtonP = new JPanel();
    innerButtonP.setLayout(new GridLayout(0, 1, 0, 3));
    innerButtonP.add(startB);
    innerButtonP.add(stopB);

    JPanel buttonP = new JPanel();
    buttonP.setLayout(new BorderLayout());
    buttonP.add(innerButtonP, BorderLayout.NORTH);

    this.setLayout(new BorderLayout(10, 10));
    this.setBorder(new EmptyBorder(20, 20, 20, 20));
    this.add(buttonP, BorderLayout.WEST);
    this.add(sc, BorderLayout.CENTER);
  }

  public static void main(String[] args) {
    SecondCounterMain scm = new SecondCounterMain();

    JFrame f = new JFrame("Second Counter");
    f.setContentPane(scm);
    f.setSize(320, 200);
    f.setVisible(true);
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
  }

  class SecondCounter extends JComponent implements Runnable {
    private volatile boolean keepRunning;

    private Font paintFont = new Font("SansSerif", Font.BOLD, 14);

    private volatile String timeMsg = "never started";

    private volatile int arcLen = 0;

    public SecondCounter() {
    }

    public void run() {
      runClock();
    }

    public void runClock() {
      DecimalFormat fmt = new DecimalFormat("0.000");
      long normalSleepTime = 100;
      long nextSleepTime = normalSleepTime;

      int counter = 0;
      long startTime = System.currentTimeMillis();
      keepRunning = true;

      while (keepRunning) {
        try {
          Thread.sleep(nextSleepTime);
        } catch (InterruptedException x) {
          // ignore
        }

        counter++;
        double counterSecs = counter / 10.0;
        double elapsedSecs = (System.currentTimeMillis() - startTime) / 1000.0;

        double diffSecs = counterSecs - elapsedSecs;

        nextSleepTime = normalSleepTime + ((long) (diffSecs * 1000.0));

        if (nextSleepTime < 0) {
          nextSleepTime = 0;
        }

        timeMsg = fmt.format(counterSecs) + " - "
            + fmt.format(elapsedSecs) + " = "
            + fmt.format(diffSecs);

        arcLen = (((int) counterSecs) % 60) * 360 / 60;
        repaint();
      }
    }

    public void stopClock() {
      keepRunning = false;
    }

    public void paint(Graphics g) {
      g.setColor(Color.black);
      g.setFont(paintFont);
      g.drawString(timeMsg, 0, 15);

      g.fillOval(0, 20, 100, 100); // black border

      g.setColor(Color.white);
      g.fillOval(3, 23, 94, 94); // white for unused portion

      g.setColor(Color.blue); // blue for used portion
      g.fillArc(2, 22, 96, 96, 90, -arcLen);
    }
  }
}

           
         
    
  

Thank with us