ADDITIONAL SYSTEM INFORMATION :
Hardware - Dell Optiplex 790; OS Windows 7 Professional SP1; JDK openjdk-11+28, java -version=openjdk version "11" 2018-9-25 OpenJDK Runtime Environment 18.9 (build 11+28)

A DESCRIPTION OF THE PROBLEM :
SimpleDateFormat used to output AM and PM as upper case with the 'a' format option. In JDK11 it is lower case

REGRESSION : Last worked in version 8u181

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Format a time using the 'a' option to give AM or PM using SimpleDateFormat. See below for a simple test - works Ok with Java 8 but not 11.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I was expecting time to be formatted AM and PM in line with previous releases
ACTUAL -
Time was formatted am and pm

---------- BEGIN SOURCE ----------

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class SDFTester
{

  public final static String FORMAT_OUT="hh:mma";
  public final static String FORMAT_IN="yyyyMMddHHmmss";
  public static void main(String[] args)
  {
   testFormat("20181008110300");
   testFormat("20181008170300");
   
  }
private static void testFormat(String aDate)
{
    try
    {
      SimpleDateFormat sdf1=new SimpleDateFormat(FORMAT_IN);
      SimpleDateFormat sdf2=new SimpleDateFormat(FORMAT_OUT);
      Date date =sdf1.parse(aDate);
      String output=sdf2.format(date);
     System.out.println(output);
     if (output.substring(6, 7).equals("M"))
     {
       System.out.println("Formatting is OK");
     }
     else
     {
       System.out.println("Formatting is not OK");
     }
    }
    catch (ParseException pe)
    {
      
    }
  }
}

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

CUSTOMER SUBMITTED WORKAROUND :
Could use toUpperCase but this needs code changes.

FREQUENCY : always