java open file and sort data

Question

good day!who any one can help on how to sort data from my name.txt

test.text

cath zeny ana dana maria sheila

heres my code:

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileNotFoundException;

import java.io.IOException;

public class ReadTextFileExample {

public static void main(String[] args) {

File file = new File("name.txt");

StringBuffer contents = new StringBuffer();

BufferedReader reader = null;

try {

reader = new BufferedReader(new FileReader(file));

String text = null;




while ((text = reader.readLine()) != null) {
contents.append(text).append(System.getProperty("line.separator"));

}

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

if (reader != null) {

reader.close();

}

} catch (IOException e) {

e.printStackTrace();

}

}


System.out.println(contents.toString());
}
}

Try using the code formatting tool in the future. Also, I happen to know this is a homework assignment, so you need to make an attempt to solve it yourself first. I'll give you a hint and say you need an array. — Tieson T.
– Tieson T., Commented Mar 29, 2011 at 5:13

David Oliván · Accepted Answer · 2011-03-29 05:14:32Z

4

Put the strings into a list:

List<string> strings = new ArrayList<string>();
while ((text = reader.readLine()) != null) {
    strings.add(text);
}

Sort the strings:

Collections.sort(strings);

Do whatever with the sorted strings, like concatenating in a single line:

StringBuffer contents = new StringBuffer();
for (string s : strings) {
    contents.append(text).append(System.getProperty("line.separator"));
}

answered Mar 29, 2011 at 5:14

David Oliván

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Comments

Neeraj · Accepted Answer · 2011-03-29 05:14:55Z

0

//Stores cath zeny ana diana etc in a String array
String[] names=contents.split(System.getProperty("line.seperator"));

//bubble sort
for(int i=0;i<names.length;i++)
   for(int j=0;j<names.length;j++)
   {
      int compare=names[i].compareTo(names[j]);
      if(compare > 0 )
         //swap names[i] and names[j]
      else
         //do nothins
   }

The above code should sort all the names in this array.

answered Mar 29, 2011 at 5:14

Neeraj

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Comments

nyyrikki · Accepted Answer · 2011-03-29 05:15:45Z

0

sorry, don't have much time to explain ...

you could put all your strings into a linkedlist or arraylist and use the Collections.sort( List lst ) method to sort them.

greetings

answered Mar 29, 2011 at 5:15

nyyrikki

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