Arabic characters in String.Format("%d",1,Locale.US)

Question

I have the following code:

private static final String PATTERN = "file_%d.txt";
int no; // 1-3
String filename = String.format(PATTERN, no ,Locale.US);

and later on I get an exception saying that

java.io.FileNotFoundException: file_٣.txt

which indicates that %d got replaced with an arabic number. How can that be if I explicitely specify Locale.US?

Answer 1

The locale needs to be the first parameter:

 String.format(Locale.US,PATTERN, no);