difficulty using scanner with bar
My program is meant to parse a bar-delimited file, but when the delimiter is set as a bar, the scanner seems to be making each character a token instead of tokenizing at the bar. This does not happen when the delimiter is set as a colon, for a colon-delimited file.
I am reading these two files:
"bar.txt":
100|first|second|third
200|alpha|beta|gamma
300|roy|gee|biv
"colon.txt":
100:first:second:third
200:alpha:beta:gamma
300:roy:gee:biv
package scantext;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
publicclass TheClass{
privatestaticvoid readFile(String filename, String delim){
try{
File file =new File(filename);
Scanner scanner =new Scanner(file);
scanner.useDelimiter(System.getProperty("line.separator"));
while (scanner.hasNext()){
System.out.println();
String theNext = scanner.next();
System.out.println(theNext);
parseline(theNext, delim);
}
scanner.close();
}catch (FileNotFoundException e){
e.printStackTrace();
}
}
publicstaticvoid parseline(String line, String delim){
Scanner lineScanner =new Scanner(line);
lineScanner.useDelimiter(delim);
System.out.println("delimiter is >" + lineScanner.delimiter() +"<");
int a = lineScanner.nextInt();
String b = lineScanner.next();
String c = lineScanner.next();
String d = lineScanner.next();
System.out.println(
"a = " + a +
", b= " + b +
", c = " + c +
", d = " + d);
}
publicstaticvoid main(String[] args){
readFile("bar.txt","|");
System.out.println();
readFile("colon.txt",":");
}
}
this is the output:
100|first|second|third
delimiter is >|<
a = 1, b= 0, c = 0, d = |
200|alpha|beta|gamma
delimiter is >|<
a = 2, b= 0, c = 0, d = |
300|roy|gee|biv
delimiter is >|<
a = 3, b= 0, c = 0, d = |
100:first:second:third
delimiter is >:<
a = 100, b= first, c = second, d = third
200:alpha:beta:gamma
delimiter is >:<
a = 200, b= alpha, c = beta, d = gamma
300:roy:gee:biv
delimiter is >:<
a = 300, b= roy, c = gee, d = biv
Message was edited by:
dough-re-mi
