Search for a repeated subtsring and print out all the string value only once in java

Hi

I am trying to read the a string that shows the version name from a text file and print it. I only want to print the string once as it occurs a few times in the text log file. I managed it with the code below that should do it but keep it compilation errors. the string I am interested in the file is as follow: Version software 219 build. The error I am getting is: The constructor FileReader(String) is undefined

Code:

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Map<String,Integer> map=new HashMap<String, Integer>();
                        FileReader freader = new FileReader("C:\\abc.log");
                        BufferedReader br = new BufferedReader(freader);
                        String s, t = "";
                        while((s = br.readLine()) != null) {
                        t = t + s;
                        }
                        freader.close();
                        String b[] = t.split("\n");
                        int j = 0;
                        while(j < b.length) {
                            String c[] = b[j].split(" ");
                            for(int i = 0; i < c.length; i++) {
                                if(c[i].equals("Version")) {
                                    String r = "";
                                    for(int k = i; k < i+4; k++)
                                        r = r + c[k] + " ";
                                    map.put(r, j);
                                }
                        }
                            j++;
                        }
                        Map<String, Integer> mapResult;
                            for (Entry<String, Integer>  entry : mapResult.entrySet()) {
                            String distance = entry.getKey();
                            Integer value = entry.getValue();
                            System.out.println(entry.getKey()); 
                        }
                              }

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Can anyone check how to fix it and if it work on their set up?:mad:

Quote:

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Originally Posted by hm99

The error I am getting is: The constructor FileReader(String) is undefined

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Are you sure you have imported everything you should? Add these,

import java.io.File;
import java.io.FileReader;

Are you sure you haven't defined your own FileReader class. Try this to make sure you're using the right FileReader,

java.io.FileReader freader = new java.io.FileReader("C:\\abc.log");

The readLine method stops reading data when it finds a lineend and returns the data without the lineend character. The split won't find the \n
Concatenating s and t without an intervening character would concatenate the end of one line with the start of the next line.

Note: single letter variable names makes the code hard to read and understand. variable names should describe the data they hold.