FULL PRODUCT VERSION :


A DESCRIPTION OF THE PROBLEM :
$ java -version
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

$ javac Example.java

$ LC_ALL=en_US.UTF-8 java Example
[49, 48, 48, 32, 37]

$ java -version
java version "1.9.0-ea"
Java(TM) SE Runtime Environment (build 1.9.0-ea-b72)
Java HotSpot(TM) 64-Bit Server VM (build 1.9.0-ea-b72, mixed mode)

$ LC_ALL=en_US.UTF-8 java Example
[49, 48, 48, -62, -96, 37]


REGRESSION. Last worked in version 8u45


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.Arrays;
import java.util.Locale;
import java.text.DecimalFormat;
import java.text.NumberFormat;

public class Example {
  public static void main(String[] args) {
    NumberFormat f = DecimalFormat.getPercentInstance(Locale.FRENCH);
    System.out.println(Arrays.toString(f.format(1).getBytes()));
  }
}

---------- END SOURCE ----------