List<String> stringList = new ArrayList<String>(Arrays.asList("10", "30", "40",

            "50", "60", "70"));

List<Integer> integerList = stringList.stream()

            .map(Integer::valueOf).collect(Collectors.toList());

test_list = ['1', '4', '3', '6', '7'] 

​

int_list = [int(i) for i in test_list]

num = [1, 2, 3, 4]

​

s = [str(i) for i in num] # Converting integers into strings

​

result = str("".join(s)) # Join the string values into one string

​

print(result)

>>> example_string = '0, 0, 0, 11, 0, 0, 0, 0, 0, 19, 0, 9, 0, 0, 0, 0, 0, 0, 11'

>>> list(map(int, example_string.split(',')))  # Python 3, in Python 2 the list() call is redundant

[0, 0, 0, 11, 0, 0, 0, 0, 0, 19, 0, 9, 0, 0, 0, 0, 0, 0, 11]

>>> [int(s) for s in example_string.split(',')]

[0, 0, 0, 11, 0, 0, 0, 0, 0, 19, 0, 9, 0, 0, 0, 0, 0, 0, 11]

​

list(map(int, xs))

Use the map function (in Python 2.x):

results = map(int, results)

​

In Python 3, you will need to convert the result from map to a list:

results = list(map(int, results))

# Basic syntax:

list_of_ints = [int(i) for i in list_of_strings]

​

# Example usage with list comprehension:

list_of_strings = ['2', '3', '47']

list_of_ints = [int(i) for i in list_of_strings]

print(list_of_ints)

--> [2, 3, 47]

integers = [1, 2, 3]

strings = [str(integer) for integer in integers]

a_string = "". join(strings)

an_integer = int(a_string)

print(an_integer)

[int(s) for s in example_string.split(',')]

​

# Python3 program to convert a list

# of integers into a single integer

def convert(list):

    # Converting integer list to string list

    # and joining the list using join()

    res = int("".join(map(str, list)))

    return res

# Driver code

list = [1, 2, 3]

print(convert(list))