How can I read a text file, search for commas, treat commas as new lines, and export it to a new file using Java? -


i have .txt file 1 billion items separated commas. want able read file.txt file, allow script read commas, copy item before comma new file, , start new line after every comma.

example of current text file format:

one, twenty one, five, 1 hundred, seven, ten, iwoi-eiwo, ei123_32323 ...

desired output:

one, twenty one, five, 1 hundred,  seven, ten, iwoi-eiwo, ei123_32323,  ......

any suggestion?

so entire file 1 line? if case, have following:

import java.util.scanner; import java.io.*;  public class converttonewline {     public static void main(string[] args) throws ioexception     {         file file = new file("text.txt");         file file2 = new file("textnocommas.txt");         printwriter writer = new printwriter(file2);         scanner reader = new scanner(file);          string alltext = reader.nextline();          alltext = alltext.replace(", ",   ",");      // replace commas , spaces commas (take out spaces after commas)         alltext = alltext.replace(",",    ",\n");      // replace commas comma , newline character          writer.print(alltext);         writer.close();          system.out.println("finished printing text.");         system.out.println("here text:");         system.out.println(alltext);          system.exit(0);     } }

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