To fix this, wrap it in a new ArrayList: List<String> list = new ArrayList<> (Arrays.asList (array)); This creates a real, independent list you can modify. 2. Use EnumSet for performance Do you store ...
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The first item sits at index 0. The last item sits at the length minus 1. - You cannot use strings as indexes. You must use non-negative integers. - Copying an array creates a shallow copy. This means ...
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