FULL PRODUCT VERSION :
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.10586]

A DESCRIPTION OF THE PROBLEM :
The operating system's default printer is changed to the printer used in the last PrinterJob.print().

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile and run the code below.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No operating system setting should be altered by a java job if not explicitly requested.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.*;
import java.awt.print.*;
import javax.print.*;

public class ResetToDefaultPrinter implements Printable {
  boolean reset;
  String preferredPrinter = "EPSON"; // Set to any but the default printer.
  PrintService defaultPrinter;

  public ResetToDefaultPrinter() {
    defaultPrinter = PrintServiceLookup.lookupDefaultPrintService(); // Save
    System.out.printf("%s%n %s%n%n", "The system's default printer is:",
defaultPrinter.getName());
    PrintService[] service = PrinterJob.lookupPrintServices(); // all printers
    int i;
    for (i=0; i<service.length; i++) {
      if (service[i].getName().contains(preferredPrinter)) break;
    }
    if (i>service.length) {
      System.out.println("Desired printer not found.");
      System.exit(0);
    }
    PrinterJob job = PrinterJob.getPrinterJob();
    job.setPrintable(this);
    try {
      job.setPrintService(service[i]);
      job.print();
    }
    catch (PrinterException ex) {
      System.out.println(ex);
    }
    System.out.printf("%s%n %s%n%n",
"After printing the default printer is now:",
PrintServiceLookup.lookupDefaultPrintService().getName());
    resetToDefault(job, defaultPrinter);
    System.out.printf("%s%n %s%n%n", "The default printer has been reset to:",
PrintServiceLookup.lookupDefaultPrintService().getName());
  }


  public static void main(String args[]) {
    new ResetToDefaultPrinter();
  }


  public int print(Graphics g, PageFormat pageFormat, int pageIndex)
throws PrinterException {
    if (pageIndex>0 || reset) return NO_SUCH_PAGE;
    Graphics2D g2D= (Graphics2D)g;
    g2D.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
    g2D.drawString("Just one line.", 50, 100);
    return PAGE_EXISTS;
  }


  public void resetToDefault(PrinterJob job, PrintService defaultPrinter) {
    if (job==null) job = PrinterJob.getPrinterJob();
    job.setPrintable(this);
    reset= true;
    try {
      job.setPrintService(defaultPrinter);
      job.print();
    }
    catch (PrinterException ex) {
      System.out.println(ex);
    }
    reset= false;
  }

}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
See the method resetToDefault(...) in the above code.