Java Program to Remove a Sublist from a List

In this article, we will understand how to remove a sub-list from a list. A list is an ordered collection that allows us to store and access elements sequentially. It contains the index-based methods to insert, update, delete and search the elements. It can also have the duplicate elements.

Below is a demonstration of the same −

Suppose our input is −

Input list: [Java, Programming, Is, Fun]

The desired output would be −

The list after removing a sublist is: [Java, Programming]

Algorithm

Step 1 - START
Step 2 - Declare an AbstractList namely input_list.
Step 3 - Add the values to the list.
Step 4 - Use subList().clear() to clear the sublist from the specified index values.
Step 5 - Display the result
Step 6 - Stop

Example 1

Here, we bind all the operations together under the ‘main’ function.

import java.util.*;
public class Demo {
   public static void main(String args[]){
      AbstractList<String> input_list = new LinkedList<String>();
      input_list.add("Java");
      input_list.add("Programming");
      input_list.add("Is");
      input_list.add("Fun");
      System.out.println("The list is defined as: " + input_list);
      input_list.subList(2, 4).clear();
      System.out.println("The list after removing a sublist is: " + input_list);
   }
}

Output

The list is defined as: [Java, Programming, Is, Fun]
The list after removing a sublist is: [Java, Programming]

Example 2

Here, we encapsulate the operations into functions exhibiting object oriented programming.

import java.util.*;
public class Demo {
   static void remove_sublist(AbstractList input_list){
      input_list.subList(2, 4).clear();
      System.out.println("The list after removing a sublist is: " + input_list);
   }
   public static void main(String args[]){
      AbstractList<String> input_list = new LinkedList<String>();
      input_list.add("Java");
      input_list.add("Programming");
      input_list.add("Is");
      input_list.add("Fun");
      System.out.println("The list is defined as: " + input_list);
      remove_sublist(input_list);
   }
}

Output

The list is defined as: [Java, Programming, Is, Fun]
The list after removing a sublist is: [Java, Programming]