在Java中没有按顺序打印文档

Question

for(int i = 0 ; i< letters.size(); i++){
    Map<String,Object> letter= letters.get(i);
    String path      = letter.get("path").toString();
    File pritingFile = new File(path);   
    Desktop desktop = null;
       if (Desktop.isDesktopSupported()) {
                    desktop = Desktop.getDesktop();
                    desktop.print(pritingFile); 
        }

  }

above for loop is printing around 200 letters but the printer is not printing letters in the sequence of order which is sent to print.

Answer 1

The javadoc for print(...) says:

Prints a file with the native desktop printing facility, using the associated application's print command.

There are no guarantees about the order in which files are printed by the native (ie OS) print system. Indeed, the javadoc doesn't even state that the formatted document has been submitted to the printer queue by the time that print returns.

You may have more success using the javax.print API:

• https://docs.oracle.com/javase/7/docs/api/javax/print/package-summary.html

There is an example in the above page.