DRAFT
MapPutNoOverwrite
Misconception:
If one tries to put an entry into a map, and the map already contains an entry with the same key, then nothing happens.
Incorrect
Map.put with an existing key does nothing
Correct
CorrectionHere is what's right.
Here is what's right.
Wrong. The existing entry will be replaced with the new entry.
Map<String,Integer> m = ...;
m.put("Hi", 2);
assert m.get("Hi")==2; // m now maps the key "Hi" to the value 2
m.put("Hi", 30);
assert m.get("Hi")==30; // m now maps the key "Hi" to the value 30Language
Java