我的代码存在很大问题。 重启Netbeans后，我的java项目停止工作。在第一时间，设计没有显示，但它被用来运行，之后出现这个错误：＆＃34;线程中的异常＆＃34; AWT-EventQueue-0＆＃34;显示java.lang.NullPointerException＆＃34;出现了。 重启后我没有触摸代码。我不知道发生了什么！ 这是整个代码，除了vars的初始化：
package TestPackage;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileNameExtensionFilter;
import java.text.ParseException;
import java.util.concurrent.ExecutionException;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
/**
*
* @author Alessandro
*/
public class MainFrame extends javax.swing.JFrame {
/** Creates new form MainFrame */
public MainFrame() {
initComponents();
this.setLocationRelativeTo(null);
this.setResizable(false);
}
/** 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")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jSplitPane1.setDividerLocation(440);
jSplitPane2.setDividerLocation(180);
jSplitPane2.setOrientation(javax.swing.JSplitPane.VERTICAL_SPLIT);
openModel.setFont(new java.awt.Font("Tahoma", 1, 24));
openModel.setText("Open existing model");
openModel.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
openModelActionPerformed(evt);
}
});
createBtn.setFont(new java.awt.Font("Tahoma", 1, 24));
createBtn.setText("Create new model");
createBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
createBtnActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
.addGap(77, 77, 77)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(openModel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(createBtn, javax.swing.GroupLayout.DEFAULT_SIZE, 277, Short.MAX_VALUE))
.addGap(83, 83, 83))
);
jPanel2Layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {createBtn, openModel});
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(29, 29, 29)
.addComponent(openModel, javax.swing.GroupLayout.PREFERRED_SIZE, 58, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(createBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 58, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(16, Short.MAX_VALUE))
);
jPanel2Layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {createBtn, openModel});
jSplitPane2.setTopComponent(jPanel2);
jList1.setModel(new javax.swing.AbstractListModel() {
String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
public int getSize() { return strings.length; }
public Object getElementAt(int i) { return strings[i]; }
});
jScrollPane1.setViewportView(jList1);
jSplitPane2.setRightComponent(jScrollPane1);
jList2.setModel(new javax.swing.AbstractListModel() {
String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
public int getSize() { return strings.length; }
public Object getElementAt(int i) { return strings[i]; }
});
jScrollPane2.setViewportView(jList2);
jTabbedPane1.addTab("Compartments", jScrollPane2);
jList3.setModel(new javax.swing.AbstractListModel() {
String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
public int getSize() { return strings.length; }
public Object getElementAt(int i) { return strings[i]; }
});
jScrollPane3.setViewportView(jList3);
jTabbedPane1.addTab("Species", jScrollPane3);
jList4.setModel(new javax.swing.AbstractListModel() {
String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
public int getSize() { return strings.length; }
public Object getElementAt(int i) { return strings[i]; }
});
jScrollPane4.setViewportView(jList4);
jTabbedPane1.addTab("Reactions", jScrollPane4);
jSplitPane2.setRightComponent(jTabbedPane1);
jSplitPane1.setLeftComponent(jSplitPane2);
jPanel5.setBorder(javax.swing.BorderFactory.createEtchedBorder(null, java.awt.Color.darkGray));
jLabel2.setFont(new java.awt.Font("Tahoma", 2, 12));
jLabel2.setText("Here you can set the simulation algorithm to compute the simulation");
buttonGroup1.add(jRadioButton1);
jRadioButton1.setFont(new java.awt.Font("Tahoma", 0, 12));
jRadioButton1.setText(" Gillespie Direct Method (DM)");
jRadioButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jRadioButton1ActionPerformed(evt);
}
});
jRadioButton2.setModel(null);
buttonGroup1.add(jRadioButton2);
jRadioButton2.setFont(new java.awt.Font("Tahoma", 0, 12));
jRadioButton2.setText(" Rejection-based Stochastic Simulation Algorithm (RSSA)");
jRadioButton3.setModel(null);
buttonGroup1.add(jRadioButton3);
jRadioButton3.setFont(new java.awt.Font("Tahoma", 0, 12));
jRadioButton3.setText(" Euler deterministic algorithm");
jRadioButton4.setModel(null);
buttonGroup1.add(jRadioButton4);
jRadioButton4.setFont(new java.awt.Font("Tahoma", 0, 12));
jRadioButton4.setText(" Runge-Kutta-Fehlberg deterministic algorithm (RK45)");
jRadioButton5.setModel(null);
buttonGroup1.add(jRadioButton5);
jRadioButton5.setFont(new java.awt.Font("Tahoma", 0, 12));
jRadioButton5.setText(" Hybrid Rejection-based Stochastic Simulation algorithm (HRRSA)");
javax.swing.GroupLayout jPanel5Layout = new javax.swing.GroupLayout(jPanel5);
jPanel5.setLayout(jPanel5Layout);
jPanel5Layout.setHorizontalGroup(
jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel5Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jRadioButton1)
.addComponent(jRadioButton2)
.addComponent(jRadioButton3)
.addComponent(jRadioButton4)
.addComponent(jRadioButton5)
.addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, 667, Short.MAX_VALUE))
.addContainerGap())
);
jPanel5Layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {jRadioButton1, jRadioButton2, jRadioButton3, jRadioButton4, jRadioButton5});
jPanel5Layout.setVerticalGroup(
jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel5Layout.createSequentialGroup()
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(23, 23, 23)
.addComponent(jRadioButton1, javax.swing.GroupLayout.DEFAULT_SIZE, 23, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jRadioButton2, javax.swing.GroupLayout.DEFAULT_SIZE, 23, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jRadioButton3, javax.swing.GroupLayout.DEFAULT_SIZE, 23, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jRadioButton4, javax.swing.GroupLayout.DEFAULT_SIZE, 23, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jRadioButton5, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGap(51, 51, 51))
);
algorithmBtn.addTab("Algorithm", jPanel5);
jPanel6.setBorder(javax.swing.BorderFactory.createEtchedBorder(null, java.awt.Color.darkGray));
jTextField2.setText("1");
jTextField4.setText(" ");
jTextField4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField4ActionPerformed(evt);
}
});
jTextField5.setText(" ");
jTextField6.setText("0.01");
jLabel4.setFont(new java.awt.Font("Tahoma", 0, 12));
jLabel4.setText("Number of simulations to compute.");
jLabel5.setFont(new java.awt.Font("Tahoma", 0, 12));
jLabel5.setText("Number of parallel threads used to simulate.");
jLabel6.setFont(new java.awt.Font("Tahoma", 0, 12));
jLabel6.setText("Maxium time instant to simulate.");
jLabel7.setFont(new java.awt.Font("Tahoma", 0, 12));
jLabel7.setText("time sampling used for storing time series.");
javax.swing.GroupLayout jPanel6Layout = new javax.swing.GroupLayout(jPanel6);
jPanel6.setLayout(jPanel6Layout);
jPanel6Layout.setHorizontalGroup(
jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel6Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel6, javax.swing.GroupLayout.DEFAULT_SIZE, 613, Short.MAX_VALUE)
.addComponent(jLabel5, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 613, Short.MAX_VALUE)
.addComponent(jLabel7, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 613, Short.MAX_VALUE)
.addComponent(jLabel4, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 613, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jTextField2)
.addComponent(jTextField6, javax.swing.GroupLayout.DEFAULT_SIZE, 47, Short.MAX_VALUE))
.addComponent(jTextField5, javax.swing.GroupLayout.DEFAULT_SIZE, 50, Short.MAX_VALUE)
.addComponent(jTextField4, javax.swing.GroupLayout.DEFAULT_SIZE, 50, Short.MAX_VALUE))
.addContainerGap())
);
jPanel6Layout.setVerticalGroup(
jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel6Layout.createSequentialGroup()
.addGroup(jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(jPanel6Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jTextField5, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel6Layout.createSequentialGroup()
.addGroup(jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(jPanel6Layout.createSequentialGroup()
.addGap(37, 37, 37)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel6Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel4, javax.swing.GroupLayout.DEFAULT_SIZE, 54, Short.MAX_VALUE)))
.addGap(18, 18, 18)
.addGroup(jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel5, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(30, 30, 30)
.addComponent(jLabel6, javax.swing.GroupLayout.PREFERRED_SIZE, 15, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGroup(jPanel6Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(jPanel6Layout.createSequentialGroup()
.addGap(31, 31, 31)
.addComponent(jLabel7, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(jPanel6Layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField6, javax.swing.GroupLayout.DEFAULT_SIZE, 28, Short.MAX_VALUE)))
.addGap(62, 62, 62))
);
jPanel6Layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {jTextField2, jTextField4, jTextField5, jTextField6});
algorithmBtn.addTab("General Options", jPanel6);
jPanel4.setBorder(javax.swing.BorderFactory.createEtchedBorder(null, java.awt.Color.darkGray));
javax.swing.GroupLayout jPanel4Layout = new javax.swing.GroupLayout(jPanel4);
jPanel4.setLayout(jPanel4Layout);
jPanel4Layout.setHorizontalGroup(
jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 687, Short.MAX_VALUE)
);
jPanel4Layout.setVerticalGroup(
jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 221, Short.MAX_VALUE)
);
algorithmBtn.addTab("Not compulsory Options", jPanel4);
jLabel1.setFont(new java.awt.Font("Tahoma", 1, 24));
jLabel1.setText(" OPTIONS");
jLabel1.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
jCheckBox1.setFont(new java.awt.Font("Arial", 0, 12));
jCheckBox1.setText(" do Plot");
jLabel3.setFont(new java.awt.Font("Tahoma", 0, 12));
jLabel3.setText("Destination Folder:");
jButton1.setText("Browse");
jButton2.setText("RUN SIMULATION");
javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
jPanel3.setLayout(jPanel3Layout);
jPanel3Layout.setHorizontalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(algorithmBtn, javax.swing.GroupLayout.DEFAULT_SIZE, 696, Short.MAX_VALUE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 568, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(jPanel3Layout.createSequentialGroup()
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel3Layout.createSequentialGroup()
.addComponent(jCheckBox1)
.addGap(286, 286, 286))
.addGroup(jPanel3Layout.createSequentialGroup()
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 112, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton1)))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 234, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(103, 103, 103))))
);
jPanel3Layout.setVerticalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 47, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(algorithmBtn, javax.swing.GroupLayout.DEFAULT_SIZE, 253, Short.MAX_VALUE)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addGap(33, 33, 33)
.addComponent(jCheckBox1)
.addGap(18, 18, 18)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton1)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(97, 97, 97))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel3Layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 91, Short.MAX_VALUE)
.addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(48, 48, 48))))
);
jSplitPane1.setRightComponent(jPanel3);
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jSplitPane1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 1146, Short.MAX_VALUE)
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jSplitPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 520, Short.MAX_VALUE)
);
jMenu1.setText("File");
jMenuItem1.setText("jMenuItem1");
jMenu1.add(jMenuItem1);
jMenuItem2.setText("jMenuItem2");
jMenu1.add(jMenuItem2);
jMenuItem3.setText("jMenuItem3");
jMenu1.add(jMenuItem3);
jMenuBar1.add(jMenu1);
jMenu2.setText("Edit");
jMenuBar1.add(jMenu2);
setJMenuBar(jMenuBar1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
pack();
}// </editor-fold>
File f;
String filename;
JFileChooser chooser;
private void openModelActionPerformed(java.awt.event.ActionEvent evt) {
chooser = new JFileChooser();
FileNameExtensionFilter filter = new FileNameExtensionFilter("TEXT FILES", "txt", "text");
chooser.setFileFilter(filter);
chooser.showOpenDialog(null);
f = chooser.getSelectedFile();
filename = f.getAbsolutePath();
String modelSpec = readSpecification();
spec = modelSpec;
}
String spec;
private void createBtnActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
CreateModel model1 = new CreateModel();
model1.setVisible(true);
}
private void jRadioButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jTextField4ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
public static void main(String args[]) {
* 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(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new MainFrame().setVisible(true);
}
});
}
public String readSpecification() {
String spec1 = "";
// trying to read from file the specification...
try {
BufferedReader reader = new BufferedReader(new FileReader(filename));
String line = reader.readLine();
while(line!=null) {
spec += line + "\n";
line = reader.readLine();
}
} catch (FileNotFoundException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
}
return spec1;
}
public static String findVolume () {
String line1;
String res = "";
String vol = "volume";
String uom = "units of measurement";
try {
BufferedReader reader1 = new BufferedReader(new FileReader("C:\\Users\\Alessandro\\Desktop\\Gemcitabine.txt"));
while((line1 = reader1.readLine()) != null) {
if(line1.toLowerCase().indexOf(vol) != -1) {
if(line1.toLowerCase().indexOf(uom) == -1) {
String[] str = line1.split("=");
res = str[1].split(" ")[0];
}
}
}
reader1.close();
} catch (FileNotFoundException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
}
return res;
}
这是错误：
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.AbstractButton.isSelected(AbstractButton.java:308)
at javax.swing.ButtonGroup.add(ButtonGroup.java:76)
at TestPackage.MainFrame.initComponents(MainFrame.java:201)
at TestPackage.MainFrame.<init>(MainFrame.java:34)
at TestPackage.MainFrame$9.run(MainFrame.java:521)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:672)
at java.awt.EventQueue.access$400(EventQueue.java:81)
at java.awt.EventQueue$2.run(EventQueue.java:633)
at java.awt.EventQueue$2.run(EventQueue.java:631)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:642)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
请帮帮我，这段代码对我来说非常重要。