Sorting Names in a text file using java program

Question

h1. Deleting numbers in a text file, sorting the names  and writing in to a new file
h2. Sample data
=================
71234 RAJA
89763 KING
89877 QUEEN
==================
h2. Java Program
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
class Sortnames { 
public static void main(String args[]) { 
try { 
ArrayList storeWordList = new ArrayList();
ArrayList storeWordList2 = new ArrayList();
               int i;
char c;
               String inputfile = "names_konda.txt";
               String tempfile = "newdatafile.txt";
               String outputfile = "sortedoutput.txt";
               StringBuffer strBuff=null;
Writer output = null;
File file =null;
               Writer sortedoutput = null;
boolean select =false;
               //*********************************************** Reading data from Input file     
FileInputStream fstream = new FileInputStream(inputfile);
// Get the object of DataInputStream
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;
//Read File Line By Line
while ((strLine = br.readLine()) != null) { 
storeWordList.add(strLine);
//Close the input stream
in.close();
               //*********************************************** Adding only alphabets to buffer and writing to file
               file= new File(tempfile);
               output = new BufferedWriter(new FileWriter(file));
strBuff = new StringBuffer();
for (Iterator iter = storeWordList.iterator(); iter.hasNext();) { 
     String s = (String) iter.next();
                    //System.out.println("String "+s);
     for (i = 0; i < s.length() ; i++)
c = s.charAt(i);
if (Character.isLetter(c)) {
strBuff.append(c);
                    strBuff.append("\n");
String myout = strBuff.toString();                
     output.write(myout);
     output.close();
     //============================================== Reading the created file,Sorting and placing in Collections
               FileInputStream fstream2 = new FileInputStream(tempfile);
// Get the object of DataInputStream
DataInputStream in2 = new DataInputStream(fstream2);
BufferedReader br2 = new BufferedReader(new InputStreamReader(in2));
String strLine2;
//Read File Line By Line
while ((strLine2 = br2.readLine()) != null) {                 
storeWordList2.add(strLine2);
Collections.sort(storeWordList2);
               //===================================================
File sortedfile = new File(outputfile);
sortedoutput = new BufferedWriter(new FileWriter(sortedfile));
for(int m=0; m<storeWordList2.size(); m++)
     if (storeWordList2.get(m).toString().trim().length() > 0)
          sortedoutput.write(storeWordList2.get(m).toString());
                    sortedoutput.write("\n");     
sortedoutput.close();
System.out.println("Names Sorted SUCCESFULLY");
br.close();
br2.close();
in.close();
fstream.close();
fstream2.close();
               ///==========================================
               File f1 = new File(tempfile);
               boolean success = f1.delete();
               if (!success){
                    System.out.println("failed deletion ");
                    System.exit(0);
                    }else{
                    System.out.println("deleted");
               // ==========================================
} catch (Exception e) {//Catch exception if any 
System.out.println("Error: " + e);
h2. Thanks and regards
h1. BalaNagaRaju.M
h1. [email protected]

Answer 1

Do you have a question? Also see the sticky welcome post on how to post formatted code.