I recently came across a small problem. The program ran fine, but my IDE had it underlined as being highly dodgy.
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| @Test | |
| public void testRemoveFromCollection() { | |
| List<String> myList = Arrays.asList("Boole", "Lovelace", "Berners-Lee", "Gosling", "Torvals"); | |
| // There's no "wrong type" - compilation error here! | |
| boolean gosling = myList.remove(new StringBuffer("Gosling")); | |
| assertThat(gosling).isFalse(); | |
| } |
It is the same for Collection.contains and Map.get
Just see the references why this is.
References
- StackOverflow - Why aren't Java Collections remove methods generic?
- https://stackoverflow.com/questions/104799/why-arent-java-collections-remove-methods-generic
- Youtube - Advanced Topics in Programming Languages: Java Puzzlers,...
- https://www.youtube.com/watch?v=wDN_EYUvUq0
