1import java.io.*;
2import java.util.ArrayList;
3
4/* file1 - file2 = file3*/
5public class CompareCSV {
6public static void main(String args[]) throws FileNotFoundException, IOException
7{
8 String path="D:\\csv\\";
9 String file1="file1.csv";
10 String file2="file2.csv";
11 String file3="p3lang.csv";
12 ArrayList al1=new ArrayList();
13 ArrayList al2=new ArrayList();
14 //ArrayList al3=new ArrayList();
15
16 BufferedReader CSVFile1 = new BufferedReader(new FileReader(path+file1));
17 String dataRow1 = CSVFile1.readLine();
18 while (dataRow1 != null)
19 {
20 String[] dataArray1 = dataRow1.split(",");
21 for (String item1:dataArray1)
22 {
23 al1.add(item1);
24 }
25
26 dataRow1 = CSVFile1.readLine(); // Read next line of data.
27 }
28
29 CSVFile1.close();
30
31 BufferedReader CSVFile2 = new BufferedReader(new FileReader(path+file2));
32 String dataRow2 = CSVFile2.readLine();
33 while (dataRow2 != null)
34 {
35 String[] dataArray2 = dataRow2.split(",");
36 for (String item2:dataArray2)
37 {
38 al2.add(item2);
39
40 }
41 dataRow2 = CSVFile2.readLine(); // Read next line of data.
42 }
43 CSVFile2.close();
44
45 for(String bs:al2)
46 {
47 al1.remove(bs);
48 }
49
50 int size=al1.size();
51 System.out.println(size);
52
53 try
54 {
55 FileWriter writer=new FileWriter(path+file3);
56 while(size!=0)
57 {
58 size--;
59 writer.append(""+al1.get(size));
60 writer.append('\n');
61 }
62 writer.flush();
63 writer.close();
64 }
65 catch(IOException e)
66 {
67 e.printStackTrace();
68 }
69}}