Java .removeRange()

The .removeRange() method removes all elements inside a specified range from an instance of the ArrayList class.

Syntax

arrayListInstance.removeRange(int fromIndex, int toIndex);

• fromIndex: It is the starting index of the element in the range that is to be removed from the ArrayList.
• toIndex: It is the ending index of the element in the range that is to be removed from the ArrayList.

Note: fromIndex and toIndex are both inclusive in the elements removed from the ArrayList.

Example

import java.util.ArrayList;

// Extend the class to arraylist because removeRange() is a protected method
public class Tasks extends ArrayList<String> {
  public static void main(String[] args) {

    // Create an ArrayList called tasksList, which will be empty for now.
    Tasks tasksList = new Tasks();

    // Add tasks to the ArrayList
    tasksList.add("Grab lunch");
    tasksList.add("Check mail");
    tasksList.add("Pick up Sammy");
    tasksList.add("Project review");
    tasksList.add("Java terms research");

    // Print the list with the new elements, before removing them.
    System.out.println("Original list: " + tasksList);

    // Remove elements from index 0 to index 3. The first 4 elements.
    tasksList.removeRange(0, 3);

    // Print the list again to see the differences
    System.out.println("List with elements removed: " + tasksList);

  }
}

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The output will look like this:

Original list: [Grab lunch, Check mail, Pick up Sammy, Project review, Java terms research]
List with elements removed: [Project review, Java terms research]

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