- Java.util Package Classes
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- Java.util Package Extras
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Java ArrayDeque clone() Method
Description
The Java ArrayDeque clone() method returns a copy of this deque. This cloning helps in preventing the side-effects of manipulating the copy of object.
Declaration
Following is the declaration for java.util.ArrayDeque.clone() method
public ArrayDeque<E> clone()
Parameters
NA
Return Value
This method returns a copy of this deque.
Exception
NA
Cloning an ArrayDeque of Integers Example
The following example shows the usage of Java ArrayDeque clone() method. In this example, we're using Integers. At first, we're creating a deque1 as a new ArrayDeque object and then initialize with few items. As next step, we're cloning the deque1 to deque2 using clone() method call on deque1 object. In the end, we're printing deque2 to check if it contains copy of all elements of deque1 object.
package com.tutorialspoint; import java.util.ArrayDeque; import java.util.Deque; public class ArrayDequeDemo { public static void main(String[] args) { // create an empty array deque ArrayDeque<Integer> deque1 = new ArrayDeque<>(); // use add() method to add elements in the deque deque1.add(1); deque1.add(2); deque1.add(3); deque1.add(4); // clone the first deque, Deque<Integer> deque2 = deque1.clone(); // let us print all the elements available in deque2 // now deque2 should have similar elements to deque1. System.out.println("ArrayDeque = " + deque2); } }
Output
Let us compile and run the above program, this will produce the following result −
ArrayDeque = [1, 2, 3, 4]
Cloning an ArrayDeque of Strings Example
The following example shows the usage of Java ArrayDeque clone() method. In this example, we're using Strings. At first, we're creating a deque1 as a new ArrayDeque object and then initialize with few items. As next step, we're cloning the deque1 to deque2 using clone() method call on deque1 object. In the end, we're printing deque2 to check if it contains copy of all elements of deque1 object.
package com.tutorialspoint; import java.util.ArrayDeque; import java.util.Deque; public class ArrayDequeDemo { public static void main(String[] args) { // create an empty array deque ArrayDeque<String> deque1 = new ArrayDeque<>(); // use add() method to add elements in the deque deque1.add("A"); deque1.add("B"); deque1.add("C"); deque1.add("D"); // clone the first deque, Deque<String> deque2 = deque1.clone(); // let us print all the elements available in deque2 // now deque2 should have similar elements to deque1. System.out.println("ArrayDeque = " + deque2); } }
Output
Let us compile and run the above program, this will produce the following result −
ArrayDeque = [A, B, C, D]
Cloning an ArrayDeque of Objects Example
The following example shows the usage of Java ArrayDeque clone() method. In this example, we're using Student objects. At first, we're creating a deque1 as a new ArrayDeque object and then initialize with few items. As next step, we're cloning the deque1 to deque2 using clone() method call on deque1 object. In the end, we're printing deque2 to check if it contains copy of all elements of deque1 object.
package com.tutorialspoint; import java.util.ArrayDeque; import java.util.Deque; public class ArrayDequeDemo { public static void main(String[] args) { // create an empty array deque ArrayDeque<Student> deque1 = new ArrayDeque<>(); // use add() method to add elements in the deque deque1.add(new Student(1, "Julie")); deque1.add(new Student(2, "Robert")); deque1.add(new Student(3, "Adam")); // clone the first deque, Deque<Student> deque2 = deque1.clone(); // let us print all the elements available in deque2 // now deque2 should have similar elements to deque1. System.out.println("ArrayDeque = " + deque2); } } class Student { int rollNo; String name; Student(int rollNo, String name){ this.rollNo = rollNo; this.name = name; } @Override public String toString() { return "[ " + this.rollNo + ", " + this.name + " ]"; } }
Output
Let us compile and run the above program, this will produce the following result −
ArrayDeque = [[ 1, Julie ], [ 2, Robert ], [ 3, Adam ]]