Create an ArrayList with the original array, using asList() method….By creating a new array:

To add an element to an array you need to use the format: array[index] = element; Where array is the array you declared, index is the position where the element will be stored, and element is the item you want to store in the array.

The only way to add two arrays in Java is to iterate over them and add individual elements and store them into a new array.

1. import java. util. Arrays;
2. class Main.
3. private static Integer[] append(Integer[] arr, int element)
4. {
5. Integer[] array = new Integer[arr. length + 1];
6. System. arraycopy(arr, 0, array, 0, arr. length);
7. array[arr. length] = element;
8. return array;

1. class Main. { // Program to convert primitive integer array to string array in Java.
2. public static void main(String[] args) { // input primitive integer array.
3. int[] intArray = { 1, 2, 3, 4 ,5 }; String[] strArray = new String[intArray. length];
4. for (int i = 0; i < intArray. length; i++) {
5. System. out.

Array in java can be copied to another array using the following ways.

1. Using variable assignment. This method has side effects as changes to the element of an array reflects on both the places.
2. Create a new array of the same length and copy each element.
3. Use the clone method of the array.
4. Use System.

To concatenate a String and some integer values, you need to use the + operator. Let’s say the following is the string. String str = “Demo Text”; Now, we will concatenate integer values.

1. Create a new array of size n+1, where n is the size of the original array.
2. Add the n elements of the original array in this array.
3. Add the new element in the n+1 th position.
4. Print the new array.

1. import java. util. Arrays; class Main.
2. { // Program to convert primitive integer array to string array in Java 8 and above. public static void main(String[] args)
3. { // input primitive integer array. int[] intArray = { 1, 2, 3, 4, 5 };
4. String[] strArray = Arrays. stream(intArray) .
5. System. out. println(Arrays.

You can convert a String to integer using the parseInt() method of the Integer class. To convert a string array to an integer array, convert each element of it to integer and populate the integer array with them.

Extending an array after initialization: As we can’t modify the array size after the declaration of the array, we can only extend it by initializing a new array and copying the values of the old array to the new array, and then we can assign new values to the array according to the size of the array declared.

Use the concat function, like so: var arrayA = [1, 2]; var arrayB = [3, 4]; var newArray = arrayA. concat(arrayB); The value of newArray will be [1, 2, 3, 4] ( arrayA and arrayB remain unchanged; concat creates and returns a new array for the result).

For example, if the original array size is N, you will create a new array with size N+1 in case you want to add one element. Once a new array is created, you can copy the original array of N elements into the new array. Then add the new element at (N+1) th location.

First of all, for initializing a container you cannot use a primitive type (i.e. int; you can use int[]but as you want just an array of integers, I see no use in that). Instead, you should use Integer, as follows: ArrayList arl = new ArrayList (); For adding elements, just use the addfunction:

Note that the add method creates a new array, copies the given array and appends the new element at the end, which may have impact on performance. You could also try this.

Here given an array of odd numbers, we need to insert number 5 at position (index) 2 in the array. To do this, we create another destination array with the size as one more than that of the original array. Now over a loop, we shift the original array elements to the new array till we reach the index where the new element is to be added.