Write a Java program to copy one array list into another

This is a Java program that demonstrates how to copy elements from one ArrayList to another using the Collections.copy() method. Here's a brief explanation of the code:

The program defines a class called Copy_ArrayList.
In the main() method, two ArrayLists are created: arr_List1 and arr_List2.
Five elements are added to each of the ArrayLists using the add() method.
The println() method is used to print the elements of both ArrayLists.
The Collections.copy() method is called to copy the elements from arr_List1 to arr_List2.
The println() method is used again to print the elements of both ArrayLists, showing that the elements of arr_List2 have been replaced with the elements of arr_List1.

Note that the Collections.copy() method requires that the destination list (arr_List2 in this case) be at least as large as the source list (arr_List1 in this case). If the destination list is smaller than the source list, an IndexOutOfBoundsException will be thrown.

Source Code

import java.util.*;
public class Copy_ArrayList
{
	public static void main(String[] args)
	{
		List<String> arr_List1 = new ArrayList<String>();
		arr_List1.add("10");
		arr_List1.add("20");
		arr_List1.add("30");
		arr_List1.add("40");
		arr_List1.add("50");
		List<String> arr_List2 = new ArrayList<String>();
		arr_List2.add("A");
		arr_List2.add("B");
		arr_List2.add("C");
		arr_List2.add("D");
		arr_List2.add("E");
		System.out.println("List1 : " + arr_List1);
		System.out.println("List2 : " + arr_List2);
		Collections.copy(arr_List2, arr_List1);
		System.out.println("Copy List1 to List2");
		System.out.println("List1 : " + arr_List1);
		System.out.println("List2 : " + arr_List2);
	}
}

Output

List1 : [10, 20, 30, 40, 50]
List2 : [A, B, C, D, E]
Copy List1 to List2
List1 : [10, 20, 30, 40, 50]
List2 : [10, 20, 30, 40, 50]

Write a Java program to copy one array list into another

Source Code

Output

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