Buffered Reader Change

Question

嗨我想用扫描仪替换BufferedReader中的一段代码？我编写了这段代码，但后来意识到我们不允许使用bufferedreader。但是，还没有一个线索如何甚至去，

public static void Option1Method() throws IOException 
{ 
FileWriter aFileWriter = new FileWriter("wordlist.txt", true); 
PrintWriter out = new PrintWriter(aFileWriter); 
String word = JOptionPane.showInputDialog(null, "Enter a word"); 

out.println(word); 
out.close(); 

aFileWriter.close(); 

String inputFile = "wordlist.txt"; 
String outputFile = "wordlist.txt"; 
FileReader fileReader = new FileReader(inputFile); 
BufferedReader bufferedReader = new BufferedReader(fileReader); 
String inputLine; 
List<String> lineList = new ArrayList<String>(); 
while ((inputLine = bufferedReader.readLine()) != null) { 
    lineList.add(inputLine); 
    } 
fileReader.close(); 

Collections.sort(lineList); 

FileWriter fileWriter = new FileWriter(outputFile); 
PrintWriter out1 = new PrintWriter(fileWriter); 
for (String outputLine : lineList) { 
    out1.println(outputLine); 
} 
out1.flush(); 
out1.close(); 
fileWriter.close(); 
} 

Answer 1

拿在Scanner类看看定义为hasNextLine和nextLine。

虽然new Scanner(fileReader)有效，但您可以直接将文件名传递给Scanner的构造函数。