Find Active, Inactive and Total users per Role-vise across salesforce Org

gistfile1.java

//Find use of Role across active/inactive users
List < User > lstUsers = [Select Id, IsActive, ProfileId, UserRoleId from user where UserRoleId != null];
map < String, Integer > mapGroupToInActive = new Map < String, Integer > ();
map < String, Integer > mapGroupTotal = new Map < String, Integer > ();
for (User objUser: lstUsers) {
	if (!objUser.IsActive) {
		if (mapGroupToInActive.containsKey(objUser.UserRoleId))
			mapGroupToInActive.put(objUser.UserRoleId, mapGroupToInActive.get(objUser.UserRoleId) + 1);
		else
			mapGroupToInActive.put(objUser.UserRoleId, 1);
	}
	if (mapGroupTotal.containsKey(objUser.UserRoleId))
		mapGroupTotal.put(objUser.UserRoleId, mapGroupTotal.get(objUser.UserRoleId) + 1);
	else
		mapGroupTotal.put(objUser.UserRoleId, 1);
}
String csvHeader = 'RoleId total inactive \n';
List < String > csvRows = new List < String > ();
for (String str: mapGroupTotal.keyset()) {
	csvRows.add(str + ' ' + mapGroupTotal.get(str) + ' ' + mapGroupToInActive.get(str));
}
String CsvFiletotal = csvHeader + String.join(csvRows, '\n');
system.debug(':::::::');
system.debug(CsvFiletotal);