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public E get(int index) {
RangeCheck(index);
return (E) elementData[index];
}
public Object get(int index) {
RangeCheck(index);
return (Object) elementData[index];
}
ArrayList<String> list = new ArrayList<String>();
list.add("abcde");
Object obj = list.get(0); // 这里应该返回是Object, 但实际返回是String