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Convert a list to array and vice versa In Java, you can convert a list to an array using the toArray() method, for example, String[] array = list.toArray(new String[0]);. To convert an array to a list, use Arrays.asList(array). For mutable lists, wrap it with new ArrayList<>(Arrays.asList(array)). These conversions are essential in collection manipulation, allowing seamless switching between array-based and list-based data structures in Java applications.