Can any one please correct this code. This is to read a file and later it should write the output to a file. Input file has 20 rows and 4 columns. If we have 1 in the 1st column of the input file then it should count all 1's and write those 1s counted value to a file.

Code:

import java.io.*; import java.util.*; import java.lang.ClassNotFoundException; class Code { public static void main(String[] args) throws IOException { String str[][] = new String[20][4]; FileReader fr = new FileReader("in.txt"); BufferedReader br = new BufferedReader( fr ); FileWriter fw = new FileWriter("out.txt"); PrintWriter pw = new PrintWriter(fw); String line = ""; int i = 0, j= 0, one=0, two=0,three=0; while( ( line = br.readLine() ) != null ) { StringTokenizer tok = new StringTokenizer(line, ", ");
if(str[i][0].equals("1") ) {
one = one++; } else if(str[i][0].equals("2") ) { two = two++; }
else if(str[i][0].equals("3") ) { three = three++; }
i++; } br.close(); fr.close(); System.out.println("Sending the output to file:"); for(i=0;i < 20; i++) { for(j=0;j<4; j++) { System.out.printf("one" +one); pw.print(one); System.out.println("two" +two); pw.print(two); System.out.println("three" +three); pw.print(three);
} pw.println(); } pw.close(); fw.close(); } }