如何使用FileOutputStream在Java中的csv文件中写入下一行

Question

I have a result obtained in the variable average_time which I later converted to bytes in order to get it written in a csv file. The result is obtained three times as I have used a loop. I want the results to be printed one by one below in the same column. But the problem is that all the values are being written in the same cell. How can I solve this problem?

    try{    
        FileOutputStream out=new FileOutputStream("testout.csv");
        String str=Integer.toString(average_time);
        byte b[]=str.getBytes();
        out.write(b);
        }
        out.close();
         //System.out.println("success...");    
        }catch(Exception e){System.out.println(e);}    
  }    

I expect it to be 15 (newline) 31 (newline) 48 (newline)

But it shows 153148

Answer 1

只需在字符串中添加“ \\ n”，然后将其写入文件即可：

String str=Integer.toString(average_time) + "\n";

Answer 2

Add this out.write("\\n".getBytes()); after out.write(b); it should give you the output you are looking for