A DESCRIPTION OF THE PROBLEM :
NumberFormat.getInstance(new Locale("fr", "FR")); no longer recognizes U+00A0 as a grouping character when parsing -- this is a regression from previous versions of java.

REGRESSION : Last worked in version 12.0.1

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
see Temp.java source code below, along with expected vs actual results

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
hossman@tray:~/tmp$ java -version
openjdk version "11.0.3" 2019-04-16
OpenJDK Runtime Environment 18.9 (build 11.0.3+7)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.3+7, mixed mode)
hossman@tray:~/tmp$ javac -version
javac 11.0.3
hossman@tray:~/tmp$ javac Temp.java
hossman@tray:~/tmp$ java Temp
### locale = fr_FR
### input = 10898
10898
class java.lang.Long
java.text.ParsePosition[index=5,errorIndex=-1]

### input = 10 898
10898
class java.lang.Long
java.text.ParsePosition[index=6,errorIndex=-1]

### input = 10 898
10898
class java.lang.Long
java.text.ParsePosition[index=6,errorIndex=-1]

### input = 10898,83491
10898.83491
class java.lang.Double
java.text.ParsePosition[index=11,errorIndex=-1]

### input = 10 898,83491
10898.83491
class java.lang.Double
java.text.ParsePosition[index=12,errorIndex=-1]

### input = 10 898,83491
10898.83491
class java.lang.Double
java.text.ParsePosition[index=12,errorIndex=-1]

ACTUAL -
hossman@tray:~/tmp$ java -version
openjdk version "13-ea" 2019-09-17
OpenJDK Runtime Environment (build 13-ea+26)
OpenJDK 64-Bit Server VM (build 13-ea+26, mixed mode, sharing)
hossman@tray:~/tmp$ javac -version
javac 13-ea
hossman@tray:~/tmp$ javac Temp.java
hossman@tray:~/tmp$ java Temp
### locale = fr_FR
### input = 10898
10898
class java.lang.Long
java.text.ParsePosition[index=5,errorIndex=-1]

### input = 10 898
10
class java.lang.Long
java.text.ParsePosition[index=2,errorIndex=-1]

### input = 10 898
10
class java.lang.Long
java.text.ParsePosition[index=2,errorIndex=-1]

### input = 10898,83491
10898.83491
class java.lang.Double
java.text.ParsePosition[index=11,errorIndex=-1]

### input = 10 898,83491
10
class java.lang.Long
java.text.ParsePosition[index=2,errorIndex=-1]

### input = 10 898,83491
10
class java.lang.Long
java.text.ParsePosition[index=2,errorIndex=-1]



---------- BEGIN SOURCE ----------
import java.util.Locale;
import java.text.NumberFormat;
import java.math.RoundingMode;
import java.text.ParsePosition;

public final class Temp {
    public static void main(String[] args) throws Exception {
        final Locale fr_FR = new Locale("fr", "FR");
        System.out.println("### locale = " + fr_FR.toString());
        final NumberFormat fmt = NumberFormat.getInstance(fr_FR);
        fmt.setParseIntegerOnly(false);
        fmt.setRoundingMode(RoundingMode.CEILING);
        for (String input : new String[] { "10898",
                                           "10 898", // NOTE: literal U+00A0 (NO-BREAK SPACE)
                                           "10\u00A0898",
                                           "10898,83491",
                                           "10 898,83491", // NOTE: literal U+00A0 (NO-BREAK SPACE)
                                           "10\u00A0898,83491" }) {
            System.out.println("### input = " + input);
            final ParsePosition pos = new ParsePosition(0);
            final Number result = fmt.parse(input, pos);
            System.out.println(result.toString());
            System.out.println(result.getClass());
            System.out.println(pos);
            System.out.println();
        }
    }
}

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

FREQUENCY : always