How to slice an ArrayList out of an ArrayList in Java?

How to slice an ArrayList out of an ArrayList in Java?

In Java, you can "slice" or create a sublist from an ArrayList by using the subList method. The subList method allows you to extract a portion of the original ArrayList and store it in a new ArrayList. Here's how you can do it:

import java.util.ArrayList; import java.util.List; public class ArrayListSlicing { public static void main(String[] args) { // Create an ArrayList ArrayList<String> originalList = new ArrayList<>(); // Add elements to the ArrayList originalList.add("Item 1"); originalList.add("Item 2"); originalList.add("Item 3"); originalList.add("Item 4"); originalList.add("Item 5"); // Define the start and end indices for the slice int startIndex = 1; // Inclusive int endIndex = 4; // Exclusive // Create a sublist using subList method List<String> slicedList = originalList.subList(startIndex, endIndex); // Print the sliced list System.out.println("Sliced List:"); for (String item : slicedList) { System.out.println(item); } } }

In this example:

  1. We create an ArrayList named originalList and add some elements to it.

  2. We specify the start index (startIndex) and end index (endIndex) for the slice. The startIndex is inclusive, and the endIndex is exclusive. In this case, we want to slice from index 1 (inclusive) to index 4 (exclusive), so we will get elements at indices 1, 2, and 3.

  3. We use the subList method to create a sublist (slicedList) from the originalList based on the specified indices.

  4. We iterate over the slicedList and print its elements.

After running this code, you will obtain a sublist containing elements "Item 2," "Item 3," and "Item 4" from the originalList. Adjust the startIndex and endIndex as needed to slice different portions of the original ArrayList.

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