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ArrayList clone() method in Java with Examples

  • Last Updated : 18 Dec, 2018
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The Java.util.ArrayList.clone() method is used to create a shallow copy of the mentioned array list. It just creates a copy of the list.

Syntax:

ArrayList.clone()

Parameters: This method does not take any parameters.

Return Value: This function returns a copy of the instance of Linked list.

Below program illustrate the Java.util.ArrayList.clone() method:



Example 1:




// Java code to illustrate clone() method
  
import java.io.*;
import java.util.ArrayList;
  
public class ArrayListDemo {
  
    public static void main(String args[])
    {
  
        // Creating an empty ArrayList
        ArrayList<String> list
            = new ArrayList<String>();
  
        // Use add() method
        // to add elements in the list
        list.add("Geeks");
        list.add("for");
        list.add("Geeks");
        list.add("10");
        list.add("20");
  
        // Displaying the list
        System.out.println("First ArrayList: "
                           + list);
  
        // Creating another linked list and copying
        ArrayList sec_list = new ArrayList();
        sec_list = (ArrayList)list.clone();
  
        // Displaying the other linked list
        System.out.println("Second ArrayList is: "
                           + sec_list);
    }
}
Output:
First ArrayList: [Geeks, for, Geeks, 10, 20]
Second ArrayList is: [Geeks, for, Geeks, 10, 20]

Example 2:




// Java code to illustrate clone() method
  
import java.io.*;
import java.util.ArrayList;
  
public class ArrayListDemo {
  
    public static void main(String args[])
    {
  
        // Creating an empty ArrayList
        ArrayList<Integer> list
            = new ArrayList<Integer>();
  
        // Use add() method
        // to add elements in the list
        list.add(10);
        list.add(20);
        list.add(30);
        list.add(40);
        list.add(50);
  
        // Displaying the list
        System.out.println("First ArrayList: "
                           + list);
  
        // Creating another linked list and copying
        ArrayList sec_list = new ArrayList();
        sec_list = (ArrayList)list.clone();
  
        // Displaying the other linked list
        System.out.println("Second ArrayList is: "
                           + sec_list);
    }
}
Output:
First ArrayList: [10, 20, 30, 40, 50]
Second ArrayList is: [10, 20, 30, 40, 50]

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