public class L20 {
public static void main(String[] args) throws IOException{
Scanner input=new Scanner(System.in);
System.out.println("Enter file name");
String in=input.nextLine();
try{
textWriter(in);
textReader(in);
textChanger(in);
}catch(Exception e){
}
}
public static void textWriter(String path) throws IOException{
String[] alphabet=
{"a","b","c","d","e","f","g","h","i","j","k","m","l","n","o","p","q","r","s","t","u","v","w","x","y","z"};
File file=new File(path);
Writer output=null;
Random number=new Random();
output=new BufferedWriter(new FileWriter(file));
int lines=10+number.nextInt(11);
for(int i=0;i<lines;i++){
int it2=1+number.nextInt(9);
int n1=number.nextInt(26);
int n2=number.nextInt(26);
int n3=number.nextInt(26);
String t2=Integer.toString(it2);
String t1=alphabet[n1]+alphabet[n2]+alphabet[n3];
String text=t1+t2;
output.write(text);
((BufferedWriter) output).newLine();
}
output.close();
System.out.println("Your file has been written");
}
public static void textReader(String path) throws IOException{
File file=new File(path);
Scanner input;
input=new Scanner(file);
String line;
while((line=input.nextLine())!=null){
System.out.println(line);
}
input.close();
}
private static void textChanger(String path) throws IOException{
File file=new File(path);
Scanner input2;
input2=new Scanner(file);
String line;
while((line=input2.nextLine())!=null){
System.out.println(line);
}
input2.close();
}
}
textWriter は正常に動作します。textReader と textChanger はまったく同じです! しかし、textReader は正常に動作しますが、textChanger は動作しません! なぜ？各メソッドのスキャナーの名前も変更しました。Text.txt は一度しか読み取れないようです??