Problem in retriving string

Question

Hi all,
i'm finding problem in retriving string
i'm getting only first line as output
the coding is
import java.io.*;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
class newprg2
public static void main(String args[]) throws IOException
InputStream in = new FileInputStream("e:/rag.txt");
//OutputStream out = newFileOutputStream("e:/rag1.txt");
int c,pos,pos1;
String s=new String();
StringBuffer sb = new StringBuffer();
while((c=in.read())!=-1)
sb.insert(0,(char)c);
sb = sb.reverse();
s = sb.toString();
pos = s.indexOf("verify scan_test",0);
s=s.substring(pos+1);
while(pos>=0)
pos=s.indexOf("_cpdp_=",pos);
pos=s.indexOf("=",pos);
pos1=s.indexOf(';', pos);
s=s.substring(pos+1,pos1);
System.out.println(s);
}here's the input file
verify scan_test  {
  Abb {* verify:0  Value:0  lifecycle:0 *}
  W tset_tp;
  S {  _cpdp_=YYYY10YYYYYYYYYYYYYYYYYYY;
  Abb {* Begin loop test *}
  S {  _cpdp_=YYYY10YYYYYYYYYYYYYYYYYYY;
  S {  _cpdp_=YYYY110YY1YYYYYYYYYYYYYYY;
  S {  _cpdp_=YYYY110YY1YYYYYYYYYYYYYYY;
  S {  _cpdp_=YYYY111YY1YYYYYYYYYYYYYYY;
  }now i'm getting output as
YYYY10YYYYYYYYYYYYYYYYYYY
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: -1
        at java.lang.String.substring(Unknown Source)
        at newprg2.main(newprg2.java:42)but i want output as
YYYY10YYYYYYYYYYYYYYYYYYY
YYYY10YYYYYYYYYYYYYYYYYYY
YYYY110YY1YYYYYYYYYYYYYYY
YYYY110YY1YYYYYYYYYYYYYYY
YYYY111YY1YYYYYYYYYYYYYYY

Answer 1

Manivel wrote:
raghavan,
Alter the code inside the while loop like below, you will get as what you expected.
while (pos >= 0) {
s = s.substring(pos + 1);
pos = s.indexOf("_cpdp_=", pos);
pos = s.indexOf("=", pos);
pos1 = s.indexOf(';', pos);
String ss = s.substring(pos + 1, pos1);
System.out.println(ss);
}-ManiI'm sorry, but, if you are simply going to spew out the answer to someones homework, you could at least explain what was wrong (before the code). They don't care in the least, but having read it, they may retain at least some spark of the meaning that the lesson was intended to teach. Like this it's just cut and paste, and who gives a damn. They learn a lot that way, NOT!