public static List nCopies(int n, Object object);

package in.bench.resources.java.collections;

import java.util.ArrayList;
import java.util.Collections;

public class CreateArrayListUsingNCopies {

	public static void main(String[] args) {

		// 7 copies of String object
		ArrayList<String> lstString = new ArrayList<String>(
				Collections.nCopies(7, "BRN"));

		// printing List of String object
		System.out.println("ArrayList of String objects : "
				+ lstString);

		// create a customer object
		Customer cust = new Customer(101, "Berry");

		// 3 copies of Customer object - user-defined object
		ArrayList<Customer> lstCustomer = new ArrayList<Customer>(
				Collections.nCopies(3, cust));

		// printing List of Customer object
		System.out.println("\n\nArrayList of Customer objects : "
				+ lstCustomer);
	}
}

class Customer {

	// member variables
	int custId;
	String custName;

	// 2-arg constructors
	public Customer(int custId, String custName) {
		super();
		this.custId = custId;
		this.custName = custName;
	}

	// overriding toString method
	@Override
	public String toString() {
		return "\nCustomer ["
				+ "Id=" + custId
				+ ", Name=" + custName
				+ "]";
	}
}

ArrayList of String objects : [BRN, BRN, BRN, BRN, BRN, BRN, BRN]

ArrayList of Customer objects : [
Customer [Id=101, Name=Berry],
Customer [Id=101, Name=Berry],
Customer [Id=101, Name=Berry]]