How to add a row to a specific index in an array of strings

Question

I have a String array as shown below:

 String[] titles = new String[] { "Booking", "Entry", "Type", "Duration", "Status", "Contract ID", "Capacity", "Start Day", "End Day", "Source Ref" }; 

I need to add some more values ​​to this array in the following state, for example below:

 titles = new String[] { "Booking", "Shipper", "Booking Quantity", "Entry", "Type", "Duration", "Status", "Contract ID", "Capacity", "Start Day", "End Day", "Source Ref" }; 

here I added "Shipper", "Booking Quantity" to the first array.

Is there a way to add these values ​​based on the index or in any way without creating, for example, the example above? (Is it possible?)

Answer 1

when you initialize an array like this

 String[] titles = new String[] { "Booking", "Entry", "Type", "Duration", "Status", "Contract ID", "Capacity", "Start Day", "End Day", "Source Ref" }; 

The array property "after initializing the array after that you cannot resize the array" *
so in your case you have to initialize a new array ....
Or you can use an ArrayList and with the add(index, value) method you can add your value to the required position ..
But implicit, it also uses the Concept of Dynamic Array..

Answer 2

I may not have understood your question, but you can use ArrayList<String> instead of simple arrays. You can do something like this:

 titles.add(1, "Shipper"); titles.add(2, "Book Quantity"); 

So, you basically add two new elements at positions 1 and 2 to the ArrayList<String> headers.

And no, you cannot do this with regular arrays.

Answer 3

No, you can’t. Arrays are not dynamic. You need to create a new array. The size must be known before the array is created.

 String[] strings = new String[titles.length + 2]; strings[0] = "Booking"; strings[1] = "Shipper"; //... 

Answer 4

To add them based on the index, you really need to create a new array and display all the value from the old array and add new values ​​at runtime.

It would be much simpler if you would use an ArrayList that has an insert method that can insert new values ​​at any index in the list

Example:

 ArrayList<String> myList = new ArrayList<>(); myList.add("Booking"); myList.add("Entry"); myList.add("Type"); myList.add("Duration"); myList.add("Status"); myList.add("Contract ID"); myList.add("Capacity"); myList.add("Start Day"); myList.add("End Day"); myList.add("Source Ref"); //insertion myList.add(1, "Shipper"); mylist.add(2, "Booking Quantity"); 

Answer 5

You can save your lines in an ArrayList<String> , and then use the .add(index, text) method

Answer 6

It is better to use List<String> and just use the add() method.

Answer 7

You can use ArrayList as follows:

 ArrayList titleList = new ArrayList<String>(); titleList.add("Shipper"); titleList.add("Booking"); titleList.add("Entry"); titleList.add("Type"); titleList.add("Duration"); titleList.add("Status"); titleList.add("Contract"); titleList.add("ID"); //.... titleList.add(1,"Shipper") titleList.add(2,"Booking quality"); 

It's good that with ArrayList you can use Iterator and perform various operations, such as searching for a specific record.