JProgressBar Example(Only how progress bar works not functional).

MD5.java

This is a sample example for `JProgressBar`. This 

    import java.awt.EventQueue;
    import java.beans.PropertyChangeEvent;
    import java.beans.PropertyChangeListener;
    import java.io.FileInputStream;
    import java.security.MessageDigest;
    import java.util.List;
    
    import javax.swing.JFrame;
    import javax.swing.JProgressBar;
    import javax.swing.SwingWorker;
    
    public class MD5 extends JFrame{
    	private JProgressBar progressBar = new JProgressBar(0, 100);
        
    	public MD5(){
            this.setTitle("Example");
            this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            this.add(progressBar);
            this.setSize(400, 200);
            this.setLocationRelativeTo(null);
            this.setVisible(true);
    	}
    	public void run() {
            progressBar.setIndeterminate(true);
            Worker task = new Worker();
            task.addPropertyChangeListener(new PropertyChangeListener() {
    
                @Override
                public void propertyChange(PropertyChangeEvent e) {
                    if ("progress".equals(e.getPropertyName())) {
                        progressBar.setIndeterminate(false);
                        progressBar.setValue((Integer) e.getNewValue());
                    }
                }
            });
            task.execute();
    	}
    	
    	class Worker extends SwingWorker<Double, Double> {
    
            private static final int N = 5;
            double x = 1;
    
            @Override
            protected Double doInBackground() throws Exception {
                for (int i = 1; i <= N; i++) {
                    x = x - (((x * x - 2) / (2 * x)));
                    setProgress(i * (100 / N));
                    publish(Double.valueOf(x));
                    Thread.sleep(1000);
                }
                return Double.valueOf(x);
            }
    
            @Override
            protected void process(List<Double> list) {
                for (double d : list) {
                	try {
    					generateHash();
    				} catch (Exception e) {
    					// TODO Auto-generated catch block
    					e.printStackTrace();
    				}
                }
            }
        }
    	
    	//-----------------------Your hash generate function-------------------------------------
    	
    	public void generateHash()throws Exception{
    		MessageDigest md = MessageDigest.getInstance("MD5");
    	    FileInputStream fis = new FileInputStream("C:\\file.txt");
    
    	    byte[] dataBytes = new byte[1024];
    
    	    int nread = 0;
    	    while ((nread = fis.read(dataBytes)) != -1) {
    	      md.update(dataBytes, 0, nread);
    	    };
    	    byte[] mdbytes = md.digest();
    
    	    StringBuffer sb = new StringBuffer();
    	    for (int i = 0; i < mdbytes.length; i++) {
    	      sb.append(Integer.toString((mdbytes[i] & 0xff) + 0x100, 16).substring(1));
    
    	        }
    
    	    System.out.println(sb.toString());
    	}
    	
    	//----------------------------------------------------------------------------
    	
        public static void main(String[] args){
        	EventQueue.invokeLater(new Runnable() {
    
                @Override
                public void run() {
                	MD5 md = new MD5();
                	md.run();
                }
            });
        }
    }