Homework help

[jonjon0688]

Using the countChars() method from the previous answer, write a method called fileSize() declared as follows:
public int fileSize (String name) {
...
}
which counts the number of characters in the file whose name is supplied as the "name" parameter. This method should return the number of characters in the file, or -1 if an IOException occurs.

This is what i have done :
public int fileSize(String name) throws IOException
{
try{
int count = 0;
File file = new File("name");
Scanner scan = new Scanner(file);

while( file.exists())
{
count++;
}
return count;
}
catch (IOException e) {
return -1;
}
}

error: cannot find the class scanner.
Any suggestions would be much appreciated?

[Laharl]

As much as I hate to implicitly condone thread necromancy, did you import java.util.Scann er?

[jonjon0688]

same question ..
public int fileSize(String name) throws IOException
{ try {
InputStreamRead er isr = new InputStreamRead er(new FileInputStream ("name"));
int charLength = 0;
int c;
while ((c = isr.read()) != -1)


charLength++;

return(charLeng th);
}

catch (Exception e) {
return -1;
}

}


error : Test 1 succeeded (0 marks):
The compilation was successful


Test 2 failed (exit code = 1):
The output should have been:
countChars

This is what was actually produced:
public int fileSize(String name) throws IOException
{ try {
InputStreamRead er isr = new InputStreamRead er(new FileInputStream ("name"));
int charLength = 0;
int c;
while ((c = isr.read()) != -1)


charLength++;

return(charLeng th);
}

catch (Exception e) {
return -1;
}

}


Test 3 failed (exit code = 1):
Your converted value was -1
It should have been 1446
Try again!


Test 4 failed (exit code = 1):
Your converted value was -1
It should have been 414
Try again!


Test 5 succeeded (1 mark):
Success!

help??