The following question is based on Java Programming Language. The code will be provided below can you find and fix the error that is in the code ? The code is about a quiz system Students need to attend 5 question and after they did the quiz they can view their score.

package childrenlanguagelearningsystem; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.ButtonGroup; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JRadioButton; public class QuizEng extends javax.swing.JFrame { String[] questions = {"The students are __ their notes ?","The doctor _ out for ten minutes ?","The new restaurant _ last week ?","It is __ ?","The train _ on time ?"}; String[][]options = {{"Wrote","Written","Writing","Write","Writes"},{"Goes","Going","Gone","Went","Go"},{"Open","Opens"," Opening","Opened","Starts"},{"Wndrful","Wonderfool","Wunderful","Wonderful","Wonderfull"},{"Arrivid","Arived","Arrives","Arrived","Arrrived"}}; int index = 0, correct = 0; ButtonGroup bg = new ButtonGroup(); public QuizEng() { initComponents(); bg.add(jRadioButton1_); bg.add(jRadioButton2_); bg.add(jRadioButton3_); bg.add(jRadioButton4_); jButton_Next_Q.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { jButton_Next_QActionPerformed(null); } }); jRadioButton1_.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { getSelectedOption(jRadioButton1_); } }); jRadioButton2_.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { getSelectedOption(jRadioButton2_); } }); jRadioButton3_.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { getSelectedOption(jRadioButton3_); } }); jRadioButton4_.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { getSelectedOption(jRadioButton4_); } }); jButton_Next_QActionPerformed(null); } public void getSelectedOption(JRadioButton rbtn) { System.out.println(rbtn.getText()); System.out.println(options[index][4]); if (rbtn.getText().equals(options[index][4])) { correct++; } index++; if (index == questions.length) { JOptionPane.showMessageDialog(this, "Quiz complete! Your score is " + correct + " out of " + questions.length); System.exit(0); } } public void enableRbuttons(boolean yes_or_no) { jRadioButton1_.setEnabled(yes_or_no); jRadioButton2_.setEnabled(yes_or_no); jRadioButton3_.setEnabled(yes_or_no); jRadioButton4_.setEnabled(yes_or_no); } @SuppressWarnings("unchecked") //  private void initComponents() { jRadioButton1_ = new javax.swing.JRadioButton(); jRadioButton2_ = new javax.swing.JRadioButton(); jRadioButton3_ = new javax.swing.JRadioButton(); jRadioButton4_ = new javax.swing.JRadioButton(); jButton_Next_Q = new javax.swing.JButton(); jPanel_Q_Container = new javax.swing.JPanel(); Lbl_Question = new javax.swing.JLabel(); jLabel1 = new javax.swing.JLabel(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); getContentPane().setLayout(null); jRadioButton1_.setText("jRadioButton1"); jRadioButton1_.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jRadioButton1_ActionPerformed(evt); } }); getContentPane().add(jRadioButton1_); jRadioButton1_.setBounds(6, 150, 388, 23); jRadioButton2_.setText("jRadioButton2"); jRadioButton2_.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jRadioButton2_ActionPerformed(evt); } }); getContentPane().add(jRadioButton2_); jRadioButton2_.setBounds(6, 176, 388, 23); jRadioButton3_.setText("jRadioButton3"); jRadioButton3_.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jRadioButton3_ActionPerformed(evt); } }); getContentPane().add(jRadioButton3_); jRadioButton3_.setBounds(6, 202, 388, 23); jRadioButton4_.setText("jRadioButton4"); jRadioButton4_.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jRadioButton4_ActionPerformed(evt); } }); getContentPane().add(jRadioButton4_); jRadioButton4_.setBounds(4, 230, 390, 23); jButton_Next_Q.setBackground(new java.awt.Color(255, 153, 102)); jButton_Next_Q.setText("Next"); jButton_Next_Q.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton_Next_QActionPerformed(evt); } }); getContentPane().add(jButton_Next_Q); jButton_Next_Q.setBounds(75, 269, 269, 23); jPanel_Q_Container.setBackground(new java.awt.Color(255, 51, 0)); Lbl_Question.setHorizontalAlignment(javax.swing.SwingConstants.CENTER); Lbl_Question.setText("Question"); javax.swing.GroupLayout jPanel_Q_ContainerLayout = new javax.swing.GroupLayout(jPanel_Q_Container); jPanel_Q_Container.setLayout(jPanel_Q_ContainerLayout); jPanel_Q_ContainerLayout.setHorizontalGroup( jPanel_Q_ContainerLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel_Q_ContainerLayout.createSequentialGroup() .addContainerGap() .addComponent(Lbl_Question, javax.swing.GroupLayout.DEFAULT_SIZE, 380, Short.MAX_VALUE) .addContainerGap()) ); jPanel_Q_ContainerLayout.setVerticalGroup( jPanel_Q_ContainerLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel_Q_ContainerLayout.createSequentialGroup() .addContainerGap() .addComponent(Lbl_Question, javax.swing.GroupLayout.DEFAULT_SIZE, 121, Short.MAX_VALUE) .addContainerGap()) ); getContentPane().add(jPanel_Q_Container); jPanel_Q_Container.setBounds(0, 0, 400, 143); jLabel1.setIcon(new javax.swing.ImageIcon("C:\\Users\\USER\\Pictures\\colorful-windows-10-gradient-minimalism-soft-gradient-hd-wallpaper-preview.jpg")); // NOI18N jLabel1.setText("jLabel1"); getContentPane().add(jLabel1); jLabel1.setBounds(0, -3, 400, 310); pack(); }//  private void jButton_Next_QActionPerformed(java.awt.event.ActionEvent evt) { // display the next question Lbl_Question.setText(questions[index]); jRadioButton1_.setText(options[index][0]); jRadioButton2_.setText(options[index][1]); jRadioButton3_.setText(options[index][2]); jRadioButton4_.setText(options[index][3]); bg.clearSelection(); enableRbuttons(true); } private void jRadioButton1_ActionPerformed(java.awt.event.ActionEvent evt) { getSelectedOption(jRadioButton1_); } private void jRadioButton2_ActionPerformed(java.awt.event.ActionEvent evt) { getSelectedOption(jRadioButton2_); } private void jRadioButton3_ActionPerformed(java.awt.event.ActionEvent evt) { getSelectedOption(jRadioButton3_); } private void jRadioButton4_ActionPerformed(java.awt.event.ActionEvent evt) { getSelectedOption(jRadioButton4_); } /** * @param args the command line arguments */ public static void main(String args[]) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new QuizEng().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JLabel Lbl_Question; private javax.swing.JButton jButton_Next_Q; private javax.swing.JLabel jLabel1; private javax.swing.JPanel jPanel_Q_Container; private javax.swing.JRadioButton jRadioButton1_; private javax.swing.JRadioButton jRadioButton2_; private javax.swing.JRadioButton jRadioButton3_; private javax.swing.JRadioButton jRadioButton4_; // End of variables declaration }