import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
 
public class CaballosForm {
 
	private JFrame frmCaballos;
	private JTextField numeroTxt;
	// TODO ...
	private HiloCaballo []hiloCaballos = null;
 
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					CaballosForm window = new CaballosForm();
					window.frmCaballos.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}
 
	public CaballosForm() {
		initialize();
	}
 
	private void initialize() {
 
		frmCaballos = new JFrame();
		frmCaballos.setTitle("Caballos");
		frmCaballos.setBounds(100, 100, 450, 300);
		frmCaballos.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frmCaballos.getContentPane().setLayout(null);
 
		JLabel lblNewLabel = new JLabel("Caballos");
		lblNewLabel.setDisplayedMnemonic('C');
		lblNewLabel.setBounds(12, 12, 70, 15);
		frmCaballos.getContentPane().add(lblNewLabel);
 
		numeroTxt = new JTextField();
		lblNewLabel.setLabelFor(numeroTxt);
		numeroTxt.setBounds(104, 10, 114, 19);
		frmCaballos.getContentPane().add(numeroTxt);
		numeroTxt.setColumns(10);
 
		JButton btnNewButton = new JButton("Ok");
		btnNewButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
 
				int n = Integer.parseInt(numeroTxt.getText());
				int y_factor = 39;
				hiloCaballos  = new HiloCaballo[n];
				for(int i = 0; i < n; i++) {
					hiloCaballos[i] = new HiloCaballo();
					hiloCaballos[i].start();
					hiloCaballos[i].getCaballo().setBounds(12, y_factor, 256, 14);
					frmCaballos.getContentPane().add(hiloCaballos[i].getCaballo());
					y_factor += 15;
				}
 
				frmCaballos.revalidate();
				frmCaballos.pack();
				frmCaballos.setBounds(100, 100, 450, 300);
 
			}
		});
		btnNewButton.setMnemonic('O');
		btnNewButton.setBounds(230, 7, 117, 25);
		frmCaballos.getContentPane().add(btnNewButton);
 
		JButton btnStop = new JButton("Stop");
		btnStop.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
 
				for(int i = 0; i < Integer.parseInt(numeroTxt.getText()); i++) {
					hiloCaballos[i].detenerHilo();
				}
 
			}
		});
		btnStop.setBounds(364, 7, 70, 25);
		frmCaballos.getContentPane().add(btnStop);
	}
}
 

import javax.swing.JProgressBar;
 
public class HiloCaballo extends Thread {
 
	private boolean stopFlag = false;
	private JProgressBar progressCaballo = null;
 
	public HiloCaballo() {
		progressCaballo = new JProgressBar();
		progressCaballo.setValue(0);
	}
 
	public JProgressBar getCaballo() {
		return progressCaballo;
	}
 
	@Override
	public void run() {
		while(!stopFlag) {
			progressCaballo.setValue((int)(Math.random() * 100.0));
			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				throw new RuntimeException(e.getMessage());
			}
		}
	}
 
	public void detenerHilo() {
		stopFlag = true;
	}
 
}