Use linked hashsets

johnmay · johnmay · commit dedcf337452a · 2020-07-19T12:12:47.000+01:00
diff --git a/base/core/src/main/java/org/openscience/cdk/sgroup/Sgroup.java b/base/core/src/main/java/org/openscience/cdk/sgroup/Sgroup.java
@@ -36,9 +36,9 @@
  */
 public class Sgroup {
 
-    private final Set<IAtom>  atoms   = new HashSet<>();
-    private final Set<IBond>  bonds   = new HashSet<>();
-    private final Set<Sgroup> parents = new HashSet<>();
+    private final Set<IAtom>  atoms   = new LinkedHashSet<>();
+    private final Set<IBond>  bonds   = new LinkedHashSet<>();
+    private final Set<Sgroup> parents = new LinkedHashSet<>();
 
     private final Map<SgroupKey, Object> attributes = new EnumMap<>(SgroupKey.class);
 
