Java: Insert an element into the array list at the first position

Last update on May 21 2025 12:47:31 (UTC/GMT +8 hours)

3. Insert at First Position

Write a Java program to insert an element into the array list at the first position.

Pictorial Presentation:

Sample Solution:-

Java Code:

import java.util.*;
  public class Exercise3 {
  public static void main(String[] args) {
  // Creae a list and add some colors to the list
  List<String> list_Strings = new ArrayList<String>();
  list_Strings.add("Red");
  list_Strings.add("Green");
  list_Strings.add("Orange");
  list_Strings.add("White");
  list_Strings.add("Black");
  // Print the list
  System.out.println(list_Strings);
  // Now insert a color at the first and last position of the list
  list_Strings.add(0, "Pink");
  list_Strings.add(5, "Yellow");
  // Print the list
  System.out.println(list_Strings);
 }
}

Sample Output:

Note: Exercise3.java uses unchecked or unsafe operations.              
Note: Recompile with -Xlint:unchecked for details.                     
[Red, Green, Orange, White, Black]                                     
[Pink, Red, Green, Orange, White, Yellow, Black] 

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to insert an element at the beginning of an ArrayList and then shift all other elements to the right.
• Write a Java program to insert multiple elements at the first position of an ArrayList using addAll() with index 0.
• Write a Java program to insert an element at the first position and then validate the insertion by comparing the new first element.
• Write a Java program to insert a color at the first position in an ArrayList and then rotate the list so that the inserted element becomes the last element.

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