I have a printer and SDK to work with it in Java. Printer working well with english letters and digits but doesn't print correctly special symbols like 'ä' or 'ê'.

I suppose that I need to convert string in charset used by printer. But I don't know what is the charset and has no chanse to get it now.

I run test printing with this simple code:

```
for (int i = 0; i < 256; i++) {
     byte[] a = new byte[1];
     a[0] = (byte) i;
     printer.print((i+" ").getBytes());
     printer.print(a);
     printer.newLine();
}

```

And now I know that 'ä' has code 132 and 'ê' has code 136.

How to find charset name, when I know which code corresponding to symbol?