Java: Replace the second element of a ArrayList with the specified element

Last update on March 12 2025 13:33:07 (UTC/GMT +8 hours)

Write a Java program to replace the second element of an ArrayList with the specified element.

Pictorial Presentation:

Sample Solution:-

Java Code:

import java.util.ArrayList;
  public class Exercise21 {
    public static void main(String[] args){
  ArrayList<String>  color = new ArrayList<String>();

  color.add("Red");
  color.add("Green");

  System.out.println("Original array list: " + color);
  String new_color = "White";
  color.set(1,new_color);

  int num=color.size();
  System.out.println("Replace second element with 'White'."); 
  for(int i=0;i<num;i++)
  System.out.println(color.get(i));
  }
}

Sample Output:

Original array list: [Red, Green]                                      
Replace second element with 'White'.                                   
Red                                                                    
White

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to replace the second element of an ArrayList with a new value and then print the updated list.
• Write a Java program to update the second element of an ArrayList conditionally based on its current value.
• Write a Java program to replace the second element in an ArrayList using Java streams to map and collect the modified list.
• Write a Java program to swap the second element with the last element of an ArrayList and then display the list.

Java Code Editor:

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