How to search a String within a text file ?

Question

************** text file ****************
Good bye good
bye good bye
good bye
good bye good
bye good
************** Input and Output ****************
Input: good bye
Output:
total strings Matched: 5
whichlinesmatched: 2
whichlinesmatched: 2
whichlinesmatched: 3
whichlinesmatched: 4
whichlinesmatched: 5
whichlinesmatched: 0
whichlinesmatched: 0
whichlinesmatched: 0
whichlinesmatched: 0
whichlinesmatched: 0
** but the desired output is 3, and only line 2, 3, 4 matched
** Could you please have further help about this? Thank you.
************** the codes****************
import java.io.*;
public class Tokenize{
public static void main( String args[] ){
int maxNumberOfLine = 1000; //the maximium number of line in data file for input
String fileName = "test"; // file name for data input
String stringForCount = "good bye"; // specified word for counting
int totalStringMatched = 0; // number of word matched
int[] whichLineMatched; // line number for each word matched
whichLineMatched = new int[maxNumberOfLine];
// Input string (stringForCount) has been stored in a string array, wordForCompare[]
// For example: stringForCount = "good bye"
int stringLength = 2;
String wordForCompare [] = { "good" , "bye" };
// wordForCompare[0] = good
// wordForCompare[1] = bye
int wordFromFile;
StreamTokenizer sttkr;
try{
FileInputStream inFile = new FileInputStream(fileName); //specifying the file to be opened
Reader rdr = new BufferedReader(new InputStreamReader(inFile)); //assigned a StreamTokenizer
sttkr = new StreamTokenizer(rdr);
sttkr.eolIsSignificant(false);
System.out.println("Searching for word : " + stringForCount );
while( (wordFromFile = sttkr.nextToken()) != StreamTokenizer.TT_EOF)
System.out.println( "going looping through file, token is: " + sttkr.sval );
if(sttkr.sval.equals(wordForCompare[0])){
if (stringLength == 1) {
totalStringMatched++;
whichLineMatched[totalStringMatched-1]=sttkr.lineno();
} else {
for (int p=1; p < stringLength; p++) {
wordFromFile = sttkr.nextToken();
System.out.println( sttkr.sval );
if (!(sttkr.sval.equals(wordForCompare[p])))
break;
else if (p==stringLength-1) {
totalStringMatched++;
whichLineMatched[totalStringMatched-1] = sttkr.lineno();
} // end of else
} // end of for-loop
} // end of else
System.out.println( " total strings Matched: " + totalStringMatched );
} // end of if
}//end of while for wordFromFile
for( int i = 0; i < 10; i++)
System.out.println( "whichlinesmatched: " + whichLineMatched<i> );
} catch(Exception e) {} //end of try
}

Answer 1

A small change to roopa_sree's code, this code fails if there are multiple occurences of the search string in the same line. Make this small change to correct it,import java.io.File;
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.StringTokenizer;
public class WordCounter {
     public static void main(String args[]) throws Exception {
          if(args.length != 1) {
               System.out.println("Invalid number of arguments!");
               return;
          String sourcefile = args[0];
          String searchFor = "good bye";
          int searchLength=searchFor.length();
          String thisLine;
          try {
               BufferedReader bout = new BufferedReader (new FileReader (sourcefile));
               String ffline = null;
               int lcnt = 0;
               int searchCount = 0;
               while ((ffline = bout.readLine()) != null) {
                    lcnt++;
                    for(int searchIndex=0;searchIndex<ffline.length();) {
                         int index=ffline.indexOf(searchFor,searchIndex);
                         if(index!=-1) {
                              System.out.println("Line number " + lcnt);
                              searchCount++;
                              searchIndex+=index+searchLength;
                         } else {
                              break;
               System.out.println("SearchCount = "+searchCount);
          } catch(Exception e) {
               System.out.println(e);
}Sudha