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How can I convert List<Integer> to String? E.g. If my List<Integer> contains numbers 1 2 and 3 how can it be converted to String = "1,2,3"? Every help will be appreciated.
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The most Pythonic way to convert a list of integers ints to a list of strings is to use the one-liner strings = [str(x) for x in ints] . It iterates over all elements in the list ints using list comprehension and converts each list element x to a string using the str(x) constructor.
We use the toString() method of the list to convert the list into a string.
I think you may use simply List.toString() as below:
List<Integer> intList = new ArrayList<Integer>(); intList.add(1); intList.add(2); intList.add(3); String listString = intList.toString(); System.out.println(listString); //<- this prints [1, 2, 3] If you don't want [] in the string, simply use the substring e.g.:
listString = listString.substring(1, listString.length()-1); System.out.println(listString); //<- this prints 1, 2, 3 Please note: List.toString() uses AbstractCollection#toString method, which converts the list into String as above
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