java list contains(Object o);

回答: Java中的List.contains(Object o)方法用于判断一个ArrayList是否包含某个元素对象。如果没有重写List的元素对象Object中的equals方法，默认会使用Object类中的equals方法进行比较。\[1\]\[2\]具体来说，List.contains(Object o)方法会遍历ArrayList中的元素，通过调用元素对象的equals方法与参数对象进行比较。如果找到了相等的元素，则返回true，否则返回false。\[3\]
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