如何在文本文件中写入多个 ArrayList

Question

In below code, i'm trying to create a txt file and there i want to add some list of values. So here my approach is create a new file if file is not present and add the respective elements into it.

Please see below, i'm unable to get my expected output, So can you help me with some idea so it will be very helpful

   public class MyTest {

    public static void main(String[] args) throws Exception  {
        // TODO Auto-generated method stub
        SftpConn sftp = new SftpConn();
        //sftp.sftpGetConnect();
        List<String> list =  new ArrayList<>();
        list.add("AAAA");
        list.add("BBBB");
        list.add("CCCC");
        sftp.writeIntoText(list);
        List<String> list1 =  new ArrayList<>();
        list1.add("AAAA1111");
        list1.add("BBBB2222");
        list1.add("CCCC2222");
        sftp.writeIntoText(list1);
    }
        
    }




 public class SftpConn
      {
    public void writeIntoText(List<String> result) throws Exception
        {
                    connect();
                    List<String> resultdata= result;
                    System.out.println("Result Updated");
                    channelSftp = (ChannelSftp) session.openChannel("sftp");
                    channelSftp.connect();
                    fileOutStream = channelSftp.put("/home/dasrsoum/RM.txt");
                    PrintWriter writer = new PrintWriter(fileOutStream,true);
                    writer.println("------------------");
                    for (String value : resultdata) {
                        writer.println(value+ System.lineSeparator());
                        System.out.println(value);
                    
                    }
                    
            
            writer.close();
   }

Actual output

 AAAA1111
   BBBB2222
   CCCC2222

Excepted OutPut

  AAAA
  BBBB
  CCCC
  AAAA1111
  BBBB2222
  CCCC2222

Answer 1

You first file is overwritten by the second call to the function