int配列をList<Integer>に変換
package test; import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; public class Test { public static void main(String[] args) { int arr[] = {0,1,2,3,4,5,6,7,8,9}; List<Integer> list = Arrays.stream(arr).boxed().collect(Collectors.toList()); System.out.println("array: " + Arrays.toString(arr)); System.out.println("list : " + list.toString()); } // array: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] // list : [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] }