Вывод русских букв

 try {
            FileInputStream file = new FileInputStream("/home/stas/IdeaProjects/first_task/source.txt");
            int i = -1;
 
            while ((i = file.read()) != -1)
            {
                System.out.print((char)(file.read()));
            }
        }
        catch (Exception e)
        {
            System.out.println(e.getMessage());
        }

BufferedReader file = new BufferedReader(new InputStreamReader(new FileInputStream("/home/stas/IdeaProjects/first_task/source.txt"), "UTF-8"));

InputStreamReader inChars = new InputStreamReader(fileIn,"UTF-8");

BufferedReader file = new BufferedReader(new InputStreamReader(new FileInputStream("/home/stas/IdeaProjects/first_task/source.txt")));

BufferedReader file = new BufferedReader(new InputStreamReader(new FileInputStream("/home/stas/IdeaProjects/first_task/source.txt")));
System.out.println(file.readLine());

            BufferedReader file = new BufferedReader(new InputStreamReader(new FileInputStream("/home/stas/IdeaProjects/first_task/source.txt"), "UTF-8"));
            String str;
            while ((str = file.readLine()) != null) {
                System.out.print(str + "\n");
            }
            file.close();