Why does this compile?
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by akf
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Published on 2009-09-29T22:35:14Z
Indexed on
2010/06/14
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I was taken aback earlier today when debugging some code to find that something like the following does not throw a compile-time exception:
public Test () {
HashMap map = (HashMap) getList();
}
private List getList(){
return new ArrayList();
}
As you can imagine, a ClassCastException is thrown at runtime, but can someone explain why the casting of a List to a HashMap is considered legal at compile time?
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