add elements to int array java code example
Example 1: java add element to existing array
String[] rgb = new String[] {"red", "green"};
String[] rgb2 = new String[rgb.length + 1];
System.arraycopy(rgb, 0, rgb2, 0, rgb.length);
rgb2[rgb.length] = "blue";
rgb = rgb2;
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));
}
}
Example 3: how to add a number to an array in java
List<Integer> myList = new ArrayList<Integer>();
myList.add(5);
myList.add(7);