On May 12, 2015, at 10:49 PM, Mandy Chung <mandy.ch...@oracle.com> wrote: >> >> Ah, I understand Mandy now. You are talking about using special Properties >> implementation just for system properties. Unfortunately, this is currently >> valid code: >> >> Properties props = new Properties(); >> ... >> System.setProperties(props); >> ... >> props.setProperty(key, value); >> assert System.getProperty(key).equals(value); >> > > > How likely does existing code do this? A proper way is to call > System.setProperty. One pattern I found on System.setProperties is like this > to add a system property of key/value pair: > > Properties props = System.getProperties(); > props.put(key, value); > System.setProperties(props); > > More investigation needs to be done (e.g. look at System.setProperties and > other system property related APIs and any spec change is needed to be made > and the compatibility implication) if we agree that it worths keeping this > change local to system properties. >
FWIW you can see some usages here: http://grepcode.com/search/usages?type=method&id=repository.grepcode.com%24java%24root@jdk%24openjdk@7u40-b43@java%24lang@System@setProperties%28java.util.Properties%29&k=u Paul.
