how to append to an integer array in java code example
Example 1: how to append to an array in java
import java.util.Arrays;
class ArrayAppend {
public static void main( String args[] ) {
int[] arr = { 10, 20, 30 };
System.out.println(Arrays.toString(arr));
arr = Arrays.copyOf(arr, arr.length + 1);
arr[arr.length - 1] = 40;
System.out.println(Arrays.toString(arr));
}
}
Example 2: how to append values in integer array in java
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
class Main
{
private static Integer[] append(Integer[] arr, int element) {
List<Integer> list = new ArrayList<>(Arrays.asList(arr));
list.add(element);
return list.toArray(new Integer[0]);
}
public static void main(String[] args) {
Integer[] nums = { 1, 2, 3, 4 };
nums = append(nums, 5);
System.out.println(Arrays.toString(nums));
}
}