IHAVE THESE CODE AND I WANT TO CHANGE IT TO SCANNER FILE .. PLEASE HELP ME WITH
ID: 3759529 • Letter: I
Question
IHAVE THESE CODE AND I WANT TO CHANGE IT TO SCANNER FILE .. PLEASE HELP ME WITH THAT
public void readFile() {
try {
// checking that file is exist or not, if file does not exists then terminate code.
File file = new File("Batting.txt");
if(!file.exists()){
System.err.println("File does not exists, please provide correct file name.");
return ;
}
FileInputStream fstream = new FileInputStream(file);
BufferedReader br = new BufferedReader(new InputStreamReader(fstream));
String strLine;
// this will read batting.txt file line by line
int arrayIndex = 0; // it maintain array index
int arraySize = 0; // it store no of elements in array ( array size)
while ((strLine = br.readLine()) != null) {
// setting the array size
if(arraySize==0){
// if this is first line from file then set the array size by reading no.
String data[] = strLine.split(" ");
arraySize = Integer.parseInt(data[0]);
playerNames = new String[arraySize];
avgScore = new double[arraySize];
} else { // setting the array values
String data[] = strLine.split(",");
double score = Double.parseDouble(data[1]);
playerNames[arrayIndex] = data[0];
avgScore[arrayIndex] = score;
arrayIndex++;
}
//System.out.println(strLine);
}
// once Batting.txt file read is done then closing the file input stream
br.close();
} catch(IOException e){
e.printStackTrace();
}
}
Explanation / Answer
public void readFile() {
try {
// checking that file is exist or not, if file does not exists then
// terminate code.
File file = new File("Batting.txt");
if (!file.exists()) {
System.err
.println("File does not exists, please provide correct file name.");
return;
}
Scanner input = new Scanner(file);
/*FileInputStream fstream = new FileInputStream(file);
BufferedReader br = new BufferedReader(new InputStreamReader(
fstream));*/
String strLine;
// this will read batting.txt file line by line
int arrayIndex = 0; // it maintain array index
int arraySize = 0; // it store no of elements in array ( array size)
String playerNames[] = null;
double avgScore[] = null;
while (input.hasNextLine()) {
strLine = input.nextLine();
// setting the array size
if (arraySize == 0) {
// if this is first line from file then set the array size
// by reading no.
String data[] = strLine.split(" ");
arraySize = Integer.parseInt(data[0]);
playerNames = new String[arraySize];
avgScore = new double[arraySize];
} else { // setting the array values
String data[] = strLine.split(",");
double score = Double.parseDouble(data[1]);
playerNames[arrayIndex] = data[0];
avgScore[arrayIndex] = score;
arrayIndex++;
}
System.out.println(strLine);
}
// once Batting.txt file read is done then closing the file input
// stream
//br.close();
input.close();
} catch (IOException e) {
e.printStackTrace();
}
}