int list in java
List<Integer> list = new ArrayList<Integer>();
int list in java
List<Integer> list = new ArrayList<Integer>();
Java 7. Converting List<List<Integer>> to int
// 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]]
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