The clone() technique for the ArrayList class is utilized to clone an ArrayList to another ArrayList in Java as it returns a shallow duplicate of its guest ArrayList.

Syntax:

public Object clone();

Return Value: 

This capacity returns a duplicate of the occurrence of Object. 

Underneath program outline the Java.util.ArrayList.clone() strategy:

Example:

// Java program to clone an ArrayList to another ArrayList

import java.util.ArrayList;
public class GFG {

	public static void main(String a[])
	{

		// create ArrayList
		ArrayList ArrList1
			= new ArrayList();

		// Insert elements in ArrayList
		ArrList1.add("Mukul");
		ArrList1.add("Rahul");
		ArrList1.add("Suraj");
		ArrList1.add("Mayank");

		// print ArrayList1
		System.out.println("Original ArrayList = "
						+ ArrList1);

		// clone ArrayList
		ArrayList ArrList2
			= (ArrayList)ArrList1.clone();

		// print ArrayList2
		System.out.println("Clone ArrayList2 = "
						+ ArrList2);
	}
}

Output

Original ArrayList = [Mukul, Rahul, Suraj, Mayank]
Clone ArrayList2 = [Mukul, Rahul, Suraj, Mayank]

Example 2:

// Java code to illustrate clone() method

import java.io.*;
import java.util.*;

public class ArrayListDemo {

	public static void main(String args[])
	{

		// Creating an empty ArrayList
		ArrayList list = new ArrayList();

		// Use add() method
		// to add elements in the list
		list.add(16);
		list.add(32);
		list.add(48);

		// Displaying the list
		System.out.println("First ArrayList: " + list);

		// Creating another linked list and copying
		// creates a shallow copy
		ArrayList sec_list
			= (ArrayList)list.clone();

		sec_list.add(64);

		// Displaying the list
		System.out.println("First ArrayList: " + list);
		
		// Displaying the other linked list
		System.out.println("Second ArrayList is: "
						+ sec_list);
	}
}

Output

First ArrayList: [16, 32, 48]
First ArrayList: [16, 32, 48]
Second ArrayList is: [16, 32, 48, 64]