Write a Java program to reverse elements in a array list

This code creates an ArrayList of String type named list_col and adds 7 elements to it. It then prints the ArrayList before and after reversing it using the Collections.reverse() method. Here is how the code works:

An ArrayList of String type list_col is created.
Seven string elements are added to the ArrayList using the add() method.
The ArrayList is printed using the println() method and the text "Before Reversing :".
The Collections.reverse() method is called with the ArrayList as the parameter to reverse the order of the elements in the ArrayList.
The ArrayList is printed again using the println() method and the text "After Reversing :".

Source Code

import java.util.*;
public class Reverse_ArrayList
{
	public static void main(String[] args)
	{
		List<String> list_col = new ArrayList<String>();
		list_col.add("Black");
		list_col.add("Orange");
		list_col.add("Pink");
		list_col.add("Blue");
		list_col.add("White");
		list_col.add("Yellow");	
		list_col.add("Purple");
		System.out.println("Before Reversing :" + list_col);  
		Collections.reverse(list_col);
		System.out.println("After Reversing :" + list_col); 
	}
}

Output

Before Reversing :[Black, Orange, Pink, Blue, White, Yellow, Purple]
After Reversing :[Purple, Yellow, White, Blue, Pink, Orange, Black]

Write a Java program to reverse elements in a array list

Source Code

Output

Example Programs

ArrayList Programs in Java