我需要别人的帮助。我收到此错误，即文件无法解析为类型。这是在底部，它说 File file = new File(filename); 不知道为什么。请有人帮忙。
谢谢
import java.util.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*; //step 1
public class QuizPanel extends JPanel{
private ArrayList<String>fileData = new ArrayList<String>();
private ArrayList<String>oneData = new ArrayList<String>();
private ArrayList<String>twoData = new ArrayList<String>();
private JButton submitButton;
private JButton nextButton;
private JButton levelOneButton;
private JButton levelTwoButton;
private JLabel question;
private JLabel correctLabel = new JLabel("");
private JLabel correctAnswer = new JLabel("");
private JLabel ended = new JLabel("");
private JLabel responce = new JLabel("");
private JRadioButton [] options = { new JRadioButton (""), new JRadioButton (""), new JRadioButton (""), new JRadioButton (""),};
ButtonGroup optionsGroup = new ButtonGroup ();
private int questionNumber = 0;
private int score = 0;
//Border Layout Panels
private JPanel northPanel = new JPanel();
private JPanel eastPanel = new JPanel();
private JPanel southPanel = new JPanel();
private JPanel westPanel = new JPanel();
private JPanel centerPanel = new JPanel();
// constructor
public QuizPanel(ArrayList<String>fileData){
EventListener listener = new EventListener();//step 3
this.fileData = fileData;
question = new JLabel();
submitButton = new JButton("Check Answer");
submitButton.addActionListener(listener);//step 4
nextButton = new JButton("Next Question");
nextButton.addActionListener(listener);
levelOneButton = new JButton("Level One");
levelOneButton.addActionListener(listener);
levelTwoButton = new JButton("Level Two");
levelTwoButton.addActionListener(listener);
for (JRadioButton each:options){
optionsGroup.add(each);
each.addActionListener(listener);
centerPanel.add(each);
}
setLayout(new BorderLayout());
//North
northPanel.setPreferredSize(new Dimension(400,65));
northPanel.setBackground(Color.black);
northPanel.add(question);
question.setVisible(false);
question.setFont(new Font("Calibri",Font.BOLD,20));
question.setForeground(Color.white);
add(northPanel,BorderLayout.NORTH);
//East
eastPanel.setPreferredSize(new Dimension(100,200));
eastPanel.setBackground(Color.green);
eastPanel.add(submitButton);
eastPanel.add(nextButton);
nextButton.setVisible(false);
add(eastPanel,BorderLayout.EAST);
//South
southPanel.setPreferredSize(new Dimension(400,65));
southPanel.setBackground(Color.black);
correctLabel.setFont(new Font("Calibri",Font.BOLD,20));
correctLabel.setForeground(Color.white);
southPanel.add(correctLabel);
correctLabel.setVisible(false);
ended.setFont(new Font("Calibri",Font.BOLD,20));
ended.setForeground(Color.white);
southPanel.add(ended);
ended.setVisible(false);
add(southPanel,BorderLayout.SOUTH);
//West
westPanel.setPreferredSize(new Dimension(100,200));
westPanel.setBackground(Color.green);
responce.setFont(new Font("Calibri",Font.BOLD,20));
westPanel.add(responce);
responce.setVisible(false);
westPanel.add(levelOneButton);
westPanel.add(levelTwoButton);
add(westPanel,BorderLayout.WEST);
//Center
centerPanel.setBackground(Color.green);
centerPanel.setVisible(false);
add(centerPanel,BorderLayout.CENTER);
//set up outer panel colour and size
setPreferredSize(new Dimension(700,350));
setBackground(Color.green);
showQuestion(0);// show first question
}
//method for show Questions
public void showQuestion(int questionNumber){
String newQuestion = fileData.get(questionNumber);
System.out.println(newQuestion);
String [] allQuestions = newQuestion.split("/");
question.setText(allQuestions[0]);
for(int i = 1; i < allQuestions.length - 1; i++){
options[i-1].setText(allQuestions[i]);
}
correctAnswer.setText(allQuestions[allQuestions.length-1]);
}
// step 2 write an inner class
private class EventListener implements ActionListener{
public void actionPerformed(ActionEvent e){
String level = " ";
if(e.getSource() == levelOneButton){
String levelOne = "levelOne.txt";
readFile(levelOne, oneData);
fileData = oneData;
showQuestion(0);
} else if (e.getSource() == levelTwoButton){
String levelTwo = "levelTwo.txt";
readFile(levelTwo, twoData);
fileData = twoData;
showQuestion(0);
}
int clicked = 0;
boolean answered = false;
if(e.getSource() == submitButton){
for(int i = 0; i < options.length; i++){
if(options[i].isSelected()){
clicked = i;
answered = true;
}
}
if(answered){
if(correctAnswer.getText().equals(options[clicked].getText())){
correctLabel.setText("Correct");
nextButton.setVisible(true);
correctLabel.setVisible(true);
submitButton.setVisible(false);
score++;
}else{
submitButton.setVisible(false);
correctLabel.setVisible(true);
nextButton.setVisible(true);
String newQuestion = fileData.get(questionNumber);
String [] allQuestions = newQuestion.split("/");
correctLabel.setText("Incorrect, Correct answer is " + allQuestions[5]);
}
}
}else if (e.getSource() == nextButton){
submitButton.setVisible(true);
nextButton.setVisible(false);
correctLabel.setVisible(false);
if(questionNumber < fileData.size() - 1){ //next question Button
questionNumber++;
optionsGroup.clearSelection();
correctAnswer.setText("");
showQuestion(questionNumber);
}else{
submitButton.setVisible(false);
nextButton.setVisible(false);
question.setVisible(false);
centerPanel.setVisible(false);
ended.setVisible(true);
ended.setText("Your score is " + score + "/3");
responce.setVisible(true);
responce.setText("Thank you for taking the quiz, Your score is below.");
}
}
}
}
public static void readFile(String filename, ArrayList<String> fileData){
File file = new File(filename);
try{
//instanitate a Scanner object to read from the object
Scanner fileScan = new Scanner(file);
//while there is another line yet to be read
while(fileScan.hasNextLine()){
fileData.add(fileScan.nextLine());
//should manage exceptions - the String might not convert into a valid integer
}
}catch (FileNotFoundException e){
System.out.println("File not found");
System.exit(1); //exit from program if file not found
}
}
}