Grafico de barras não mostra as barras

BOA TARDE . ALGUÉM SABE ME DIZER O PORQUE AS BARRAS DO GRÁFICO NÃO APARECEM?

CLASSE do Gráfico :

import java.io.File;

import java.io.IOException;

import static java.lang.Double.max;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Date;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.swing.DefaultListModel;

import javax.swing.Icon;

import javax.swing.ImageIcon;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import org.jfree.chart.ChartFactory;

import org.jfree.chart.ChartUtilities;

import org.jfree.chart.JFreeChart;

import org.jfree.chart.plot.PlotOrientation;

import org.jfree.data.category.DefaultCategoryDataset;

/**
*

@author efer_
*/
public class exercicio_forca_iso_bilateral extends javax.swing.JFrame {

// Variáveis globais

DefaultListModel lm = new DefaultListModel();

serial s = new serial();

ArrayList valores = new ArrayList();

Double maior_valor;

Double media=0.5;

//Inserindo os valores de força máxima e média no gráfio

ArrayList<Teste_isometria> DadosGrafico= new ArrayList<>();

/* DadosGrafico.add(new Teste_isometria(“Força Máxima”,maior_valor));

DadosGrafico.add(new Teste_isometria(“Força Média”,media));*/

// -------------------------------------------

/**

Creates new form principal
*/
public exercicio_forca_iso_bilateral() {
initComponents();
}

/**

This method is called from within the constructor to initialize the form.
WARNING: Do NOT modify this code. The content of this method is always

regenerated by the Form Editor.

*/

@SuppressWarnings(“unchecked”)

// 

private void initComponents() {

jScrollPane1 = new javax.swing.JScrollPane();

jList1 = new javax.swing.JList<>();

btnIniciar = new javax.swing.JButton();

jButton3 = new javax.swing.JButton();

btnParar = new javax.swing.JButton();

jLabel1 = new javax.swing.JLabel();

jLabel2 = new javax.swing.JLabel();

jLabel3 = new javax.swing.JLabel();

jLabel4 = new javax.swing.JLabel();

jLabel5 = new javax.swing.JLabel();

jLabel6 = new javax.swing.JLabel();

jLabel7 = new javax.swing.JLabel();

jLabel8 = new javax.swing.JLabel();

jLabel9 = new javax.swing.JLabel();

jLabel11 = new javax.swing.JLabel();

jLabel12 = new javax.swing.JLabel();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setResizable(false);

jScrollPane1.setViewportView(jList1);

btnIniciar.setText(“Iniciar”);

btnIniciar.addMouseListener(new java.awt.event.MouseAdapter() {

public void mouseClicked(java.awt.event.MouseEvent evt) {

btnIniciarMouseClicked(evt);

}

});

btnParar.setText(“Parar”);

btnParar.addMouseListener(new java.awt.event.MouseAdapter() {

public void mouseClicked(java.awt.event.MouseEvent evt) {

btnPararMouseClicked(evt);

}

});

jLabel1.setFont(new java.awt.Font(“Tahoma”, 1, 14)); // NOI18N
jLabel1.setText(“Máximo:”);

jLabel2.setText(“0”);

jLabel3.setText(“Mínimo:”);

jLabel4.setText(“0”);

jLabel5.setFont(new java.awt.Font(“Tahoma”, 1, 14)); // NOI18N
jLabel5.setText(“Média:”);

jLabel6.setText("-");

jLabel7.setFont(new java.awt.Font(“Tahoma”, 1, 14)); // NOI18N
jLabel7.setText(“Tempo:”);

jLabel8.setText(“00:00”);

jLabel9.setFont(new java.awt.Font(“Tahoma”, 0, 14)); // NOI18N

jLabel9.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);

jLabel9.setText(“Dados:”);

jLabel11.setFont(new java.awt.Font(“Tahoma”, 0, 14)); // NOI18N
jLabel11.setText(“DATA:”);

jLabel12.setFont(new java.awt.Font(“Tahoma”, 1, 14)); // NOI18N
jLabel12.setText(“Teste de força Isométrica Máxima - Bilateral”);

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());

getContentPane().setLayout(layout);

layout.setHorizontalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(layout.createSequentialGroup()

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(layout.createSequentialGroup()

.addContainerGap()

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(layout.createSequentialGroup()

.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 118, javax.swing.GroupLayout.PREFERRED_SIZE)

.addGap(30, 30, 30)

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)

.addComponent(btnIniciar, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

.addComponent(btnParar, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

.addComponent(jLabel1)

.addComponent(jLabel3)

.addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

.addComponent(jLabel4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

.addComponent(jLabel5)

.addComponent(jLabel6, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

.addComponent(jLabel7)

.addComponent(jLabel8, javax.swing.GroupLayout.PREFERRED_SIZE, 67, javax.swing.GroupLayout.PREFERRED_SIZE)))

.addComponent(jLabel11)

.addComponent(jLabel9, javax.swing.GroupLayout.PREFERRED_SIZE, 118, javax.swing.GroupLayout.PREFERRED_SIZE))

.addGap(132, 132, 132)

.addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 615, javax.swing.GroupLayout.PREFERRED_SIZE))

.addGroup(layout.createSequentialGroup()

.addGap(263, 263, 263)

.addComponent(jLabel12)))

.addContainerGap(51, Short.MAX_VALUE))

);

layout.setVerticalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()

.addGap(38, 38, 38)

.addComponent(jLabel12)

.addGap(51, 51, 51)

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(layout.createSequentialGroup()

.addComponent(jLabel11)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)

.addComponent(jLabel9)

.addGap(13, 13, 13)

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(layout.createSequentialGroup()

.addComponent(btnIniciar)

.addGap(8, 8, 8)

.addComponent(btnParar)

.addGap(31, 31, 31)

.addComponent(jLabel7)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(jLabel8)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(jLabel1)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(jLabel2)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(jLabel3)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(jLabel4)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(jLabel5)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(jLabel6)

.addGap(0, 0, Short.MAX_VALUE))

.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 371, Short.MAX_VALUE)))

.addComponent(jButton3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))

.addContainerGap())

);

pack();
}//

Thread t = new Thread(new Runnable() {

<a class="mention" href="/u/override">@Override</a>

public void run() {

char ch = s.lerCOM();

int escolha = JOptionPane.showConfirmDialog(null, “Pronto para começar?”, “Confirmar”, JOptionPane.YES_NO_OPTION);

if (escolha != JOptionPane.NO_OPTION) {

long inicio = System.currentTimeMillis();

while (true) {    // loop infinito !!!!
             
             // Cronometro
             
             long atual = System.currentTimeMillis();
             long tempo = (atual - inicio);
             jLabel8.setText(new SimpleDateFormat("mm:ss").format(new Date(atual - inicio)));
             jLabel8.updateUI();
             
             // ----------
             
             boolean continuar = true;
             String palavra = "";
             while (continuar) {
                 ch = s.lerCOM();
                 System.out.print(ch);
                 if (ch != '\n') {
                     palavra += ch;
                 } else {
                     // Para limpar e só mostrar os valores vamos usar o try ... catch ...
                     try {
                         Double.parseDouble(palavra);   // Tenta converter para double, se não der vai para o catch e ignora o valor
                         lm.addElement(palavra);
                     } catch (Exception e) {}
                     continuar = false;
                 }
                 jList1.setModel(lm);
                 jList1.updateUI();
             }
             // Manter o valor máximo encontrado atualizado
             try {
                 if (Double.parseDouble(palavra) > Double.parseDouble(jLabel2.getText())) {
                     jLabel2.setText(palavra);
                     jLabel2.updateUI();
                     
                    
                 }
             } catch (Exception e) {
             }
             // Manter o valor mínimo encontrado atualizado
             try {
                 if (Double.parseDouble(palavra) < Double.parseDouble(jLabel4.getText())) {
                     jLabel4.setText(palavra);
                     jLabel4.updateUI();
                    
                     
                 }
             } catch (Exception e) {
             }
         }
     }
 }

});

private void btnIniciarMouseClicked(java.awt.event.MouseEvent evt) {

btnIniciar.setEnabled(false);   // Desabilita o botão

s.selecionaCOM(“COM3”);

lm.removeAllElements();

t.start();  // Inicia a Thread

}

/*public void calculos(){

int j = 0;
 for (j = 0; j < valores.size(); j++) {
     if ((double) valores.get(j) > max) {
         max = (double) valores.get(j);
         maior_valor = max; // colocando a força maior na váriavel maior_valor
     }
     if ((double) valores.get(j) < min) {
         min = (double) valores.get(j);
     }
     soma += (double) valores.get(j);
 }
 jLabel2.setText(Double.toString(max));
 jLabel4.setText(Double.toString(min));
 String num = String.format("%.2f", soma / j);
 jLabel6.setText(num);
 media = Double.parseDouble(num);// colocando a média na variável média
 // -------------------------------------

} */

DefaultCategoryDataset pegaDados() {

DefaultCategoryDataset dataset = new DefaultCategoryDataset();
 String t = "0";
 
 for (int i = 0; i < lm.getSize(); i++) {
     try {
         
         dataset.addValue(media, "Media","");
         dataset.addValue(maior_valor, "Maior Valor", "");
         
         int temp = Integer.parseInt(t);
         temp++;
         t = Integer.toString(temp);
         valores.add(Double.parseDouble(lm.getElementAt(i).toString()));
     } catch (Exception e) {
     }
 }
 return dataset;

}

private void btnPararMouseClicked(java.awt.event.MouseEvent evt) {
t.stop(); // Para a Thread
btnIniciar.setEnabled(true); // Habilita o botão
s.fecharCOM(); // Fechar porta COM

JFreeChart grafico_Barra = ChartFactory.createBarChart("Isometria", "Forças", "Valor Força", pegaDados(), PlotOrientation.VERTICAL, true,true,false);

 File fl = new File("C:\\Users\\user\\Documents\\NetBeansProjects\\novoForcaIsometrica\\teste.jpg");
 try {
     ChartUtilities.saveChartAsJPEG(fl, grafico_Barra, jButton3.getWidth(), jButton3.getHeight());     // fl é o arquivo onde vai ser salvo
 } catch (IOException ex) {
     Logger.getLogger(exercicio_forca_iso_bilateral.class.getName()).log(Level.SEVERE, null, ex);
 }
 // grafico_barras é o gráfico
 // valor, valor é o tamanho
 // Coloca o arquivo como imagem no botão
 Icon i = new ImageIcon("C:\\Users\\user\\Documents\\NetBeansProjects\\novoForcaIsometrica\\teste.jpg");
 jButton3.setIcon(i);
 // -------------------------------------
 // Achar maior e menor valor
 double min = 0, max = 0, soma = 0;
 int j = 0;
 for (j = 0; j < valores.size(); j++) {
     if ((double) valores.get(j) > max) {
         max = (double) valores.get(j);
         maior_valor = max; // colocando a força maior na váriavel maior_valor
     }
     if ((double) valores.get(j) < min) {
         min = (double) valores.get(j);
     }
     soma += (double) valores.get(j);
 }
 jLabel2.setText(Double.toString(max));
 jLabel4.setText(Double.toString(min));
 String num = String.format("%.2f", soma / j);
 jLabel6.setText(num);
 media = Double.parseDouble(num);// colocando a média na variável média
 // -------------------------------------

}

/**

@param args the command line arguments
/
public static void main(String args[]) {
/ Set the Nimbus look and feel /
//
/ If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
- For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
  */
  try {
  for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
  if (“Nimbus”.equals(info.getName())) {
  javax.swing.UIManager.setLookAndFeel(info.getClassName());
  break;
  }
  }
  } catch (ClassNotFoundException ex) {
  java.util.logging.Logger.getLogger(exercicio_forca_iso_bilateral.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
  } catch (InstantiationException ex) {
  java.util.logging.Logger.getLogger(exercicio_forca_iso_bilateral.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
  } catch (IllegalAccessException ex) {
  java.util.logging.Logger.getLogger(exercicio_forca_iso_bilateral.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
  } catch (javax.swing.UnsupportedLookAndFeelException ex) {
  java.util.logging.Logger.getLogger(exercicio_forca_iso_bilateral.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
  }
  //
  //
  //
  //
```
/* Create and display the form */

java.awt.EventQueue.invokeLater(new Runnable() {

public void run() {

new exercicio_forca_iso_bilateral().setVisible(true);

}

});

}
```

// Variables declaration - do not modify

private javax.swing.JButton btnIniciar;

private javax.swing.JButton btnParar;

private javax.swing.JButton jButton3;

private javax.swing.JLabel jLabel1;

private javax.swing.JLabel jLabel11;

private javax.swing.JLabel jLabel12;

private javax.swing.JLabel jLabel2;

private javax.swing.JLabel jLabel3;

private javax.swing.JLabel jLabel4;

private javax.swing.JLabel jLabel5;

private javax.swing.JLabel jLabel6;

private javax.swing.JLabel jLabel7;

private javax.swing.JLabel jLabel8;

private javax.swing.JLabel jLabel9;

private javax.swing.JList jList1;

private javax.swing.JScrollPane jScrollPane1;

// End of variables declaration

}

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