Issue
I am designing a program that saves the index location for specific characters from a message. Then, I need to retrieve these characters according to their index location. I kept the locations for these characters in a .txt file. I retrieved them, but at the end, I got this message "Exception in thread "AWT-EventQueue-0" java.lang.IndexOutOfBoundsException: Index 120 out of bounds for length 120". My codes:
int n;
String s;
int lineNumCount = 0;
String coverText = stegoMsg.getText(); // get the stego text from the textfield
int k = coverText.length(); // get the length for the stego text
int lineNumb = 1;
Scanner myFile = null;
try{
Scanner file = new Scanner(new File("location.txt"));//location.txt is the file that has the locations for the characters
myFile = file;
}catch (FileNotFoundException e){
System.out.println("File does not found");
}
while (myFile.hasNextLine()){
//Count the Number of the lines in location.txt
//1. Read the File
File fileLocation = new File("location.txt");
if(fileLocation.exists()){
try {
FileReader fr = new FileReader(fileLocation);
LineNumberReader lr = new LineNumberReader(fr); //2. Read the lines for location.txt
while((lr.readLine()) !=null){
lineNumCount++;
}
// System.out.println("Total Number of the Lines " + lineNumCount);
} catch (FileNotFoundException ex) {
Logger.getLogger(ExtPage.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(ExtPage.class.getName()).log(Level.SEVERE, null, ex);
}
for(int x = 0; x<lineNumCount; ++x){
try{
String line = Files.readAllLines(Paths.get("location.txt")).get(lineNumb);
// System.out.println("Line First " + line);
BufferedReader bufrd = new BufferedReader(new FileReader("SFile.txt")); //SFile.txt is the file that has the messsage that I need to take the location for the specific characters
int nn = Integer.parseInt(line);
s = bufrd.readLine();
System.out.println("The Location " + nn + " is : "+ s.charAt(nn)); // read the character that has this location
lineNumb++;
}catch(IOException e){
System.out.println("Line 334");
}
}
}
}
myFile.close();
}
Is it possible to guide me on how I can solve the exception? I appreciate any help you can provide.
Solution
Here is the solution ...
int n;
String s;
int lineNumCount = 0;
String coverText = stegoMsg.getText(); // get the stego text from the textfield
int k = coverText.length(); // get the length for the stego text
int lineNumb = 1;
Scanner myFile = null;
try{
Scanner file = new Scanner(new File("location.txt"));
myFile = file;
}catch (FileNotFoundException e){
System.out.println("File does not found");
}
try{
while (myFile.hasNext()){
//Count the Number of the lines in location.txt
//1. Read the File
File fileLocation = new File("C:\\Users\\Farah\\Dropbox\\Steganography codes\\NewStegoTech\\location.txt");
if(fileLocation.exists()){
try {
FileReader fr = new FileReader(fileLocation);
LineNumberReader lr = new LineNumberReader(fr); //2. Read the lines for location.txt
while((lr.readLine()) !=null){
lineNumCount++;
}
} catch (FileNotFoundException ex) {
Logger.getLogger(ExtPage.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(ExtPage.class.getName()).log(Level.SEVERE, null, ex);
}
try{
String line = Files.readAllLines(Paths.get("location.txt")).get(lineNumb);
// System.out.println("Line First " + line);
BufferedReader bufrd = new BufferedReader(new FileReader("Stego File.txt"));
int nn = Integer.parseInt(line);
s = bufrd.readLine();
System.out.println("The Loocation " + nn + " is : "+ s.charAt(nn)); // read the character that has this location
lineNumb++;
}catch(IOException e){
System.out.println(e);
}
}
}
}catch(IndexOutOfBoundsException e)
{
System.out.println("Finish reading file");
}
myFile.close();
Answered By - Asst. Farah Answer Checked By - David Marino (PHPFixing Volunteer)
Posts
