Breaking News: Grepper is joining You.com. Read the official announcement!

Java 7. Converting List<List<Integer>> to int[][]:

Add Answer

Wandering Wolverine answered on May 22, 2020 Popularity 9/10 Helpfulness 2/10

answer Java 7. Converting List<List<Integer>> to int[][]:

related list to int array in java 8

related how to convert int array to Integer List in java

related convert int array to integer list java

related List of Integer to int array

Java 7. Converting List<List<Integer>> to int[][]:

Comment

// original list
List<List<Integer>> list = Arrays.asList(
        Arrays.asList(1, 2),
        Arrays.asList(2),
        Arrays.asList(3));
// initialize the array,
// specify only the number of rows
int[][] arr = new int[list.size()][];
// iterate through the array rows
for (int i = 0; i < arr.length; i++) {
    // initialize the row of the array,
    // specify the number of elements
    arr[i] = new int[list.get(i).size()];
    // iterate through the elements of the row
    for (int j = 0; j < arr[i].length; j++) {
        // populate the array
        arr[i][j] = list.get(i).get(j);
    }
}
// output
System.out.println(Arrays.deepToString(arr));
// [[1, 2], [2], [3]]

Popularity 9/10 Helpfulness 2/10 Language java

Source: stackoverflow.com

Tags: java

Link to this answer
Share Copy Link

Contributed on May 24 2021

Wandering Wolverine

0 Answers Avg Quality 2/10

Closely Related Answers

list to int array in java 8

Comment

int[] array = list.stream().mapToInt(i->i).toArray();

Popularity 10/10 Helpfulness 10/10 Language java

Source: stackoverflow.com

Tags: int

Link to this answer
Share Copy Link

Contributed on Jul 30 2020

Shiny Sloth

0 Answers Avg Quality 2/10

how to convert int array to Integer List in java

Comment

int[] ints = {1,2,3};
List<Integer> list = Arrays.stream(ints).boxed().collect(Collectors.toList());

Popularity 10/10 Helpfulness 6/10 Language java

Source: stackoverflow.com

Tags: int

Link to this answer
Share Copy Link

Contributed on Aug 28 2021

kris07

0 Answers Avg Quality 2/10

convert int array to integer list java

Comment

int[] arr = {1,2,3};
IntStream.of(arr).boxed().collect(Collectors.toList());

Popularity 10/10 Helpfulness 5/10 Language java

Source: stackoverflow.com

Tags: int

Link to this answer
Share Copy Link

Contributed on May 22 2020

Shiny Sloth

0 Answers Avg Quality 2/10

List of Integer to int array

Comment

int[] example1 = list.stream().mapToInt(i->i).toArray();
// OR
int[] example2 = list.stream().mapToInt(Integer::intValue).toArray();

Popularity 9/10 Helpfulness 4/10 Language whatever

Source: stackoverflow.com

Tags: int integer inte

Link to this answer
Share Copy Link

Contributed on Jun 24 2022

Inna Kim

0 Answers Avg Quality 2/10

List of Integer to int array

Comment

int [] ints = list.stream().mapToInt(Integer::intValue).toArray();

Popularity 9/10 Helpfulness 4/10 Language whatever

Source: stackoverflow.com

Tags: int

Link to this answer
Share Copy Link

Contributed on Jul 16 2021

Glorious Goldfinch

0 Answers Avg Quality 2/10

Java 7. Converting List<List<Integer>> to int[][]:

Contents

More Related Answers

Java 7. Converting List<List<Integer>> to int[][]:

Closely Related Answers

list to int array in java 8

how to convert int array to Integer List in java

convert int array to integer list java

List of Integer to int array

List of Integer to int array

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.