From 0cc03210d5d53d12604688f294b6ca39e3a025de Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Sat, 20 Jun 2015 09:35:26 -0700 Subject: altoslib/altosuilib: Fix equals methods, add hashCode Whenever we use a class as a HashMap key, that class needs to override the equals(Object) and hashCode() methods. Otherwise, the hash table won't work right. Signed-off-by: Keith Packard --- altoslib/AltosLatLon.java | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'altoslib/AltosLatLon.java') diff --git a/altoslib/AltosLatLon.java b/altoslib/AltosLatLon.java index dc606ccb..1bcf6fd8 100644 --- a/altoslib/AltosLatLon.java +++ b/altoslib/AltosLatLon.java @@ -21,9 +21,17 @@ public class AltosLatLon { public double lat; public double lon; - public boolean equals(AltosLatLon other) { - if (other == null) + public int hashCode() { + return new Double(lat).hashCode() ^ new Double(lon).hashCode(); + } + + public boolean equals(Object o) { + if (o == null) return false; + if (!(o instanceof AltosLatLon)) + return false; + + AltosLatLon other = (AltosLatLon) o; return lat == other.lat && lon == other.lon; } -- cgit v1.2.3