[JAVA]Come trasformare un InternalFrame con JInternalFrame in un'unica finestra?

[xxdavide84xx]

Avendo questo codice in cui ho una finestra con dentro un frame con il mio grafico, come faccio a fare il grafico direttamente nella finestra senza farlo dentro un frame???

import java.awt.Dimension;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.swing.JInternalFrame;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.data.time.Second;
import org.jfree.data.time.RegularTimePeriod;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class InternalFrame extends ApplicationFrame {

    public InternalFrame(String title) {
        super(title);
      JInternalFrame frame = createFrame();   
        frame.pack();
     frame.setLocation(0, 0);
         frame.setVisible(true); 
        getContentPane().add(frame);           
    }
    
    private JInternalFrame createFrame() {
        XYDataset dataset = createDataset("Nome linea",new Second());
    	JFreeChart chart = ChartFactory.createTimeSeriesChart("Trend Cella 30","Tempo","Temperatura",dataset,true,true,true);
    	ChartPanel chartPanel = new ChartPanel(chart);	
        chartPanel.setPreferredSize(new Dimension(800, 600));
        JInternalFrame frame = new JInternalFrame("", true);
        frame.getContentPane().add(chartPanel);
        return frame;
    
    private XYDataset createDataset(String name, RegularTimePeriod start) {
    	
        TimeSeries series = new TimeSeries("Temperatura ambiente", start.getClass());
        TimeSeries series1 = new TimeSeries("Temperatura prodotto", start.getClass());
        TimeSeries series2 = new TimeSeries("Set alta temperatura", start.getClass());
        TimeSeries series3 = new TimeSeries("Set bassa temperatura", start.getClass()); 
        TimeSeries series4 = new TimeSeries("Set temperatura media", start.getClass());
        
    	Connection con = null;
    	  
        try {
        	String driver = "net.sourceforge.jtds.jdbc.Driver";
        	Class.forName(driver).newInstance();
        	} 
        catch (Exception e) {
        	System.out.println("Fallito il caricamento dei driver SQL.");
        	return (null);
        					}
        try {
        	// Query SQL
        	String SQL= "SELECT TOP 1728 * FROM Cella30Trend ORDER BY Tempo DESC";
             // Connessione col database in cui vengono specificati url, nome utente, password
        	con = DriverManager.getConnection("jdbc:jtds:sqlserver://localhost:1433/MioDb", "**", "**");
        	Statement select = con.createStatement();
        	//caricamento query SQL
        	ResultSet result = select.executeQuery(SQL);
        	
          		while (result.next()) {
          			String tempo = result.getString(2);
          			double temp_a = result.getDouble(3);
          			double temp_p = result.getDouble(4);
          			double temp_s_a = result.getDouble(5);
          			double temp_s_b = result.getDouble(6);
          			double temp_s_m = result.getDouble(7); 
          		
          			DateFormat dateformat=new SimpleDateFormat("yyyy/MM/dd HH.mm.ss");       			
          			java.util.Date data=dateformat.parse(tempo);
          			
          			series.addOrUpdate(new Second(data),temp_a);
          			series1.addOrUpdate(new Second(data),temp_p);
          			series2.addOrUpdate(new Second(data),temp_s_a);
          			series3.addOrUpdate(new Second(data),temp_s_b);
          			series4.addOrUpdate(new Second(data),temp_s_m);
     								}
        	} 
        catch (Exception e) {
        	e.printStackTrace();
        					} 
        					finally {
        							if (con != null) {
        												try {
        														con.close();
        													} 
        												catch (Exception e) {
        														e.printStackTrace();
        																		}
        												}
        					}				

        TimeSeriesCollection dataset = new TimeSeriesCollection();
        dataset.addSeries(series);
        dataset.addSeries(series1);
        dataset.addSeries(series2);
        dataset.addSeries(series3);
        dataset.addSeries(series4);
       
        return dataset;
    }
    public static void main( String[] args) {
    	InternalFrame iframe = new InternalFrame("Trend Frigo");
        iframe.pack();
        RefineryUtilities.centerFrameOnScreen(iframe);
        iframe.setVisible(true);     
    }
    }