public class MainFrame extends JFrame {
    ResultSet rsMain;
	
    public static void main(String[] args) {
              javax.swing.SwingUtilities.invokeLater(new Runnable() {
	      public void run() {
	             JFrame.setDefaultLookAndFeelDecorated(true);
		new MainFrame();
		}
	  });
    }

public MainFrame() {
    super("Window");
    final JButton      btExec  = new JButton("Выполнить");
    final DatabaseTableModel dtmMain = new DatabaseTableModel(true);
    JTable tbMain = new JTable(dtmMain);
    ..................
    btExec.addActionListener(new ActionListener() {
	public void actionPerformed(ActionEvent e) {
	try {
                   Thread t1 = new Thread(new JDBCThread(tfPath.getText(),tfUser.getText(),tfWord.getText(),rsMain));
	      t1.start();
	      dtmMain.setDataSource(rsMain);   - здесь наверное нужно синхронизировать два потока
                 } catch (Exception Exp) {System.out.println("Произошла ошибка в визуализации: "+Exp);
                }
            }
            });
  plExec.add(btExec);

import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.DriverManager;

public class JDBCThread implements Runnable{
  String Path,User,Word;
  ResultSet rsMain;
  
  JDBCThread(String Path,String User,String Word, ResultSet rsMain) {
	  this.Path = Path;
	  this.User = User;
	  this.Word = Word;
	  this.rsMain = rsMain;
	  }
 
  public void run(){
	  try {
		  Class.forName("oracle.jdbc.driver.OracleDriver");
		  Connection conn = DriverManager.getConnection(Path,User,Word);
		  Statement st = conn.createStatement();
		  rsMain = st.executeQuery("select * from DD10");
		  } catch (Exception e) {System.out.println("Произошла ошибка при выполнении: "+e);
		  }
	  }
  }

  	 progressBar.setValue(chunk);

 protected void process(List chunks) {
         for (Integer chunk : chunks)

btExec.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent e) {
        try {
	   (new Thread(new JDBCThread(tfPath.getText(),tfUser.getText(),tfWord.getText(),dtmMain))).start();
	} catch (Exception Ex) 
            {
                System.out.println("Произошла ошибка в визуализации: "+Ex);
             }
    }
    }

import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.DriverManager;

public class JDBCThread implements Runnable{
  String Path,User,Word;
  DatabaseTableModel dtmMain;
  
  JDBCThread(String Path,String User,String Word,DatabaseTableModel dtmMain) {
	  this.Path = Path;
	  this.User = User;
	  this.Word = Word;
	  this.dtmMain = dtmMain;
	  }
 
  public void run(){
	  try {
		  Class.forName("oracle.jdbc.driver.OracleDriver");
		  Connection conn = DriverManager.getConnection(this.Path, this.User, this.Word);
		  Statement st = conn.createStatement();
		  this.dtmMain.setDataSource(st.executeQuery("select * from DD10"));
		  conn.close();
		  } catch (Exception e) {System.out.println("Произошла ошибка в запросе: "+e);
		  }
	  }
  }

		btExec.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
	             if (cbKind.isSelected()==false){
	 				try {
	 					new JDBCSelect(tfPath.getText(),tfUser.getText(),tfWord.getText(),dtmMain);
				    } catch (Exception Ex) {System.out.println("Произошла ошибка в визуализации: "+Ex);
	                }
	             } else {
	 				try {
	 					(new Thread(new JDBCThread(tfPath.getText(),tfUser.getText(),tfWord.getText(),dtmMain))).start();
					} catch (Exception Ex) {System.out.println("Произошла ошибка в визуализации: "+Ex);
	                }
	             }
			}
			});

package ConnectAndChange;

import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.DriverManager;
import oracle.jdbc.driver.OracleDriver;

public class JDBCSelect {
  
  JDBCSelect(String sPath,String sUser,String sWord,DatabaseTableModel dtmMain) {
	  try {
		  Connection conn = DriverManager.getConnection(sPath,sUser,sWord);
		  Statement st = conn.createStatement();
		  dtmMain.setDataSource(st.executeQuery("select * from DD10"));
		  st.close();
		  conn.close();
		  } catch (Exception e) {System.out.println("Произошла ошибка в запросе: "+e);
		  }
	  }
  }

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

package ConnectAndChange;

import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.DriverManager;

public class JDBCThread implements Runnable{
  String sPath,sUser,sWord;
  DatabaseTableModel dtmMain;
  
  JDBCThread(String sPath,String sUser,String sWord,DatabaseTableModel dtmMain) {
	  this.sPath = sPath;
	  this.sUser = sUser;
	  this.sWord = sWord;
	  this.dtmMain = dtmMain;
	  }
 
  public void run(){
	  new JDBCSelect(sPath,sUser,sWord,dtmMain);
	  }
  }

private static class FlipPair {
    private final long heads, total;

    FlipPair(long heads, long total) {
        this.heads = heads;
        this.total = total;
    }
}

private class FlipTask extends SwingWorker<Void, FlipPair> {
@Override
protected Void doInBackground() {
    long heads = 0;
    long total = 0;
    Random random = new Random();
    while (!isCancelled()) {
        total++;
        if (random.nextBoolean()) {
            heads++;
        }
        publish(new FlipPair(heads, total));
    }
    return null;
}
Описали стат. класс FlipPair
publish(new FlipPair(heads, total)); - cоздаем и публикуем его ?????
Зачем доп. класс для хранения инфо - почему не писать непосредственон ?

protected void process(List<FlipPair> pairs) {
    FlipPair pair = pairs.get(pairs.size() - 1);
    headsText.setText(String.format("%d", pair.heads));
    totalText.setText(String.format("%d", pair.total));
    devText.setText(String.format("%.10g", ((double) pair.heads)/((double) pair.total) - 0.5));

Пишем его значение НАПРЯМУЮ в поля головной формы  !??????
при этом СИНХРОНИЗУРУЯ момент ввода 

Поясните пожалуйста 

private class FlipTask extends SwingWorker<Void, FlipPair> {
@Override
protected Void doInBackground() {
    long heads = 0;
    long total = 0;
    Random random = new Random();
    while (!isCancelled()) {
        total++;
        if (random.nextBoolean()) {
            heads++;
        }
        publish(new FlipPair(heads, total));
    }
    return null;
}

protected Void doInBackground() 

protected void process(List<FlipPair> pairs) {
    FlipPair pair = pairs.get(pairs.size() - 1);

new JDBCSwingThread(tfPath.getText(),tfUser.getText(),tfWord.getText(),dtmMain);

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.List;
import javax.swing.SwingWorker;

public class JDBCSwingThread {

	public JDBCSwingThread(String sPath,String sUser,String sWord,DatabaseTableModel dtmMain){
    	(new ExecuteQuery(sPath,sUser,sWord,dtmMain)).execute();
	}
    		     		
    private static class ExitQuery {
        private final ResultSet rsSet;
        private final Connection cnCon;
        
        ExitQuery(ResultSet rsSet,Connection cnCon) {
        	this.rsSet = rsSet;
        	this.cnCon = cnCon;
        }
    }

    private class ExecuteQuery extends SwingWorker<Void, ExitQuery> {
    	String sPath,sUser,sWord;
    	DatabaseTableModel dtmMain;
        private Connection cnCon;
    	private ResultSet rsSet;
       
    	
    	public ExecuteQuery(String sPath,String sUser,String sWord,DatabaseTableModel dtmMain){
        	this.sPath = sPath;
        	this.sUser = sUser;
        	this.sWord = sWord;
        	this.dtmMain = dtmMain;
    	}

        protected Void doInBackground() {
    		try {
    			cnCon = DriverManager.getConnection(this.sPath,this.sUser,this.sWord);
    			Statement st = cnCon.createStatement();
    			rsSet = st.executeQuery("select * from DD10");
    			} catch (Exception e) {System.out.println("Произошла ошибка в запросе: "+e);
    			}
    		publish(new ExitQuery(rsSet,cnCon));
    		return null;
        }

        protected void process(List<ExitQuery> lItem) {
        	ExitQuery Item = lItem.get(lItem.size() - 1);
        	try{
        		this.dtmMain.setDataSource(Item.rsSet);
        		Item.rsSet.close();
        		Item.cnCon.close();
        		} catch(Exception e) {}
        	}
        }
    }

   [SIZE=2]class ExitQuery;[/SIZE] - говорю что это класс, а описываю его внутри родителя 
   который его возвращает. 

   public class ExecuteQuery extends SwingWorker<Void, [SIZE=2]ExitQuery[/SIZE]> {
    	String sPath,sUser,sWord;
    	DatabaseTableModel dtmMain;
        private Connection cnCon;
    	private ResultSet rsSet;

    - теперь описание 
    private static class [SIZE=2]ExitQuery[/SIZE] {
        private final ResultSet rsSet;
        private final Connection cnCon;
        
        ExitQuery(ResultSet rsSet,Connection cnCon) {
        	this.rsSet = rsSet;
        	this.cnCon = cnCon;
        }
    }
    . . . . . . .  . . . . . .       

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.List;
import javax.swing.SwingWorker;
import java.util.HashMap;

public class JDBCSwingThread extends SwingWorker<Void, HashMap> {
	private String sPath,sUser,sWord;
	private DatabaseTableModel dtmMain;
	private Connection cnCon;
	private ResultSet  rsSet;
	
	public JDBCSwingThread(String sPath,String sUser,String sWord,DatabaseTableModel dtmMain){
		this.sPath = sPath;
		this.sUser = sUser;
		this.sWord = sWord;
		this.dtmMain = dtmMain;
		}
	
	private class SaveReturn {
		private final Connection cnCon;
		private final ResultSet  rsSet;

		public SaveReturn(Connection cnCon,ResultSet rsSet) {
			this.cnCon = cnCon;
			this.rsSet = rsSet;
			}
		}

	protected Void doInBackground() {
		try {
			cnCon = DriverManager.getConnection(this.sPath,this.sUser,this.sWord);
			Statement st = cnCon.createStatement();
			rsSet = st.executeQuery("select * from DD10");
			} catch (Exception e) {System.out.println("Произошла ошибка в запросе: "+e);
			}
		HashMap hmQuery = new HashMap();
		hmQuery.put(1,(new SaveReturn(cnCon,rsSet)));
		publish(hmQuery);
		return null;
		}

	protected void process(List<HashMap> Items) {
		try{
			SaveReturn srSave = (SaveReturn)Items.get(0).get(1);
			this.dtmMain.setDataSource(srSave.rsSet);
			srSave.rsSet.close();
			srSave.cnCon.close();
			} catch(Exception e) {}
		}
	}

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.List;
import javax.swing.SwingWorker;
import java.util.HashMap;

public class JDBCSwingThread extends SwingWorker<Void, HashMap> {
	private String sPath,sUser,sWord;
	private DatabaseTableModel dtmMain;
	private Connection cnCon;
	private ResultSet  rsSet;
	
	public JDBCSwingThread(String sPath,String sUser,String sWord,DatabaseTableModel dtmMain){
		this.sPath = sPath;
		this.sUser = sUser;
		this.sWord = sWord;
		this.dtmMain = dtmMain;
		}

	protected Void doInBackground() {
		try {
			cnCon = DriverManager.getConnection(this.sPath,this.sUser,this.sWord);
			Statement st = cnCon.createStatement();
			rsSet = st.executeQuery("select * from DD10");
			} catch (Exception e) {System.out.println("Произошла ошибка в запросе: "+e);
			}
        publish(new HashMap());
		return null;
		}

	protected void process(List<HashMap> Items) {
		try{
			this.dtmMain.setDataSource(this.rsSet);
			this.rsSet.close();
			this.cnCon.close();
			} catch(Exception e) {}
		}
	}

type
{ Forward declarations }

  TField = class;
  TObjectField = class;
  TDataLink = class;

Потом идет обьявление БАЗОВОГО класса который ссылаеться на ЭТО тип
Потом идет обьявление ЭТОГО клаcса который ссылаеться на БАЗОВЫЙ тип