Java – how to add elements to the end of an array?

I want to know how to add or append a new element to the end of the array Is there a simple way to add elements at the end? I know how to use StringBuffer, but I don't know how to use it to add elements to an array No ArrayList or list, I prefer it I wonder if StringBuffer can handle integers

Solution

You cannot add elements to an array because arrays in Java are fixed length However, you can use arrays Copyof (array, size) build a new array from an existing array:

public static void main(String[] args) {
    int[] array = new int[] {1,2,3};
    System.out.println(Arrays.toString(array));
    array = Arrays.copyOf(array,array.length + 1); //create new array from old array and allocate one more element
    array[array.length - 1] = 4;
    System.out.println(Arrays.toString(array));
}

I still recommend abandoning arrays and using list