What would be the best way to read in a file that is space delimited and at the end of each row there is a carriage return.
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File f = new File("<path to file>");
BufferedReader d = new BufferedReader(new FileReader(f));
while ((s=d.readLine()) != null) {
System.out.println(s);
}
if you want to parse out the words delimited by the space.
StringTokenizer st;
while ((s=d.readLine()) != null) {
st = new StringTokenizer(s, " ");
while (st.hasMoreTokens()) {
System.out.println(st.next
}
}
d.close();
How about this?
try {
InputStream in = new FileInputStream("filename"
ByteArrayOutputStream out = new ByteArrayOutputStream();
int b;
while ((b = in.read()) != -1) out.write(b);
byte[] data = out.toByteArray();
in.close()
} catch (FileNotFoundException fnfe) {
System.out.println(fnfe);
} catch (IOException ioe) {
System.out.println(ioe);
}
I chose this means because I prefer having the bytes to manipulate.
If you want to read the file a line at a time, you can do this instead:
try {
BufferedReader bufReader = new BufferedReader(new FileReader("filename"))'
String str;
while ((str = bufReader.readLine()) != null) {
System.out.println(str);
}
bufReader.close();
} catch (FileNotFoundException fnfe) {
System.out.println(fnfe);
} catch (IOException ioe) {
System.out.println(ioe);
}
If you really want to tokenize the whole file, I would combine a few of the suggestions into the following:
StringTokenizer strTok;
String str;
Vector data = new Vector()
try {
BufferedReader bufReader = new BufferedReader(new FileReader("filename"))'
while ((str = bufReader.readLine()) != null) {
strTok = new StringTokenizer(str, " ");
while (strTok.hasMoreTokens()) {
data.addElement(strTok.nex
}
}
bufReader.close();
} catch (FileNotFoundException fnfe) {
System.out.println(fnfe);
} catch (IOException ioe) {
System.out.println(ioe);
}
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Answer for Membership
by: TimYatesPosted on 2003-01-29 at 13:31:04ID: 7841109
private Vector readInData( String filename ) throws IOException
{
Vector ret = new Vector() ;
File file;
BufferedReader fileReader;
file = new File( filename );
fileReader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
if(file.exists())
{
String line = fileReader.readLine();
while( line != null )
{
ret.addElement( line ) ;
contact = fileReader.readLine(); //Get next contact from file
}
}
fileReader.close();
return ret ;
}
will return you a Vector with ret.size() lines from the file
Then:
Vector v = readInData( "theFile.dat" ) ;
for( int i = 0 ; i < v.size() ; i++ )
{
String line = (String)v.elementAt( i ) ;
StringTokenizer st = new StringTokenizer( line ) ;
while (st.hasMoreTokens())
{
println(st.nextToken());
}
}
should do it