regular expressions in java

[chkontog]

Hello,
i would like to split words in comma, space and punctuations.I have write the above code

import java.io.BufferedReader;
    import java.io.FileReader;
    import java.io.IOException;
    import java.util.ArrayList;
import java.util.StringTokenizer;
     
     
    // main class
    public class Main {
     
        // for saving word objects
        private ArrayList<Word> words;
     
        public static void main(String[] args) throws IOException {
     
            Main main = new Main();
            main.start();//start
     
        }
     
        private void start() throws IOException {
     
            readFile(); // read file
            printWords(); // print results
        }
     
        private void readFile()throws IOException{
     
            BufferedReader input = new BufferedReader(new FileReader("a.txt"));
            words = new ArrayList<Word>();
     
            int lineNum = 1; // we read first line in start
     
            // delimeters of line in this example only "space"
            String delim1, delim2;
            char [] parse1 = {' '};
            char [] parse2 = {','};
            
            delim1 = new String(parse1);
            delim2 = new String(parse2);
            String line = input.readLine();
            String [] lineWords;
     
            // read line while end of file
            while(line != null){
     
                
                    lineWords = line.split("[^a-zA-Z]+");
                    //lineWords = line.[\\s,;\n+\\d\\W\t\r\\s+]+
                
     
                // split the words and create word object
                for (int i = 0; i < lineWords.length; i++) {
                    
                    if(lineWords[i]!=null){
                    System.out.print("i:"+i);
                    //if(lineWords[i].compareTo(" ")!=0);
                        System.out.println(lineWords[i]);
                    Word w = new Word(lineNum,i+1,lineWords[i]); // lineNum -> line number i+1--> words index in line
                    words.add(w);                       // lineWords[i] is word  
                    }
                }
                lineNum++;    // pass the next line
     
                line = input.readLine();
     
            }
     
        }
     
        // print out the results
        private void printWords() {
     
            System.out.println("WORD\t\tLINE\t\tINDEX");
            System.out.println();
     
            for (int i = 0; i < words.size(); i++) {
                Word w = words.get(i);
                if(w.name.compareTo("\\n")!=0)
                System.out.println(w.name + "\t\t" + w.lineNum + "\t\t" + w.index);
            }
     
        }
     
        // class word for model of every word object
     
        class Word{
            private int lineNum;
            private int index;
            private String name;
     
            public Word(int lineNum, int index, String name) {
                this.lineNum = lineNum;
                this.index = index;
                this.name = name;
            }
     
            public int getLineNum() {
                return lineNum;
            }
            public int getIndex() {
                return index;
            }
            public String getName() {
                return name;
            }    
        }    
    }

but when in the text i have something like these "322 abb",

the array linewords[], it returns a space at the first element (i=0) and then "abb".

Why it returns a space element?

[chkontog]

upppp

[quad64bit]

Are you trying to include or exclude the 322? numbers are not word characters so they will be ignored. Also I don't see that lines 35 through 40 do anything. You could always just add in a check for empty entries and skip those, just look for a 0 length string!