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ArrayDeque remove() Method in Java
Last Updated : 10 Dec, 2018
- The Java.util.ArrayDeque.remove() method is used to remove the element present at the head of the Deque.
Syntax:
Array_Deque.remove()
Parameters: The method does not take any parameters.
Return Value: This method returns the element present at the head of the Deque.
Exceptions: The method throws NoSuchElementException is thrown if the deque is empty.
Below programs illustrate the Java.util.ArrayDeque.remove() method:
Program 1:
Java
// Java code to illustrate remove()
import java.util.*;
public class ArrayDequeDemo {
public static void main(String args[])
{
// Creating an empty ArrayDeque
Deque<String> de_que = new ArrayDeque<String>();
// Use add() method to add elements into the Deque
de_que.add("Welcome");
de_que.add("To");
de_que.add("Geeks");
de_que.add("For");
de_que.add("Geeks");
// Displaying the ArrayDeque
System.out.println("Initial ArrayDeque: " + de_que);
// Removing elements using remove() method
de_que.remove();
de_que.remove();
// Displaying the ArrayDeque after removal
System.out.println("ArrayDeque after removing "
+ "elements: " + de_que);
}
}
Output:
Initial ArrayDeque: [Welcome, To, Geeks, For, Geeks]
ArrayDeque after removing elements: [Geeks, For, Geeks]
Program 2:
Java
// Java code to illustrate remove()
import java.util.*;
public class ArrayDequeDemo {
public static void main(String args[])
{
// Creating an empty ArrayDeque
Deque<Integer> de_que = new ArrayDeque<Integer>();
// Use add() method to add elements into the Deque
de_que.add(10);
de_que.add(15);
de_que.add(30);
de_que.add(20);
de_que.add(5);
// Displaying the ArrayDeque
System.out.println("Initial ArrayDeque: " + de_que);
// Removing elements using remove() method
de_que.remove();
de_que.remove();
// Displaying the ArrayDeque after removal
System.out.println("ArrayDeque after removing "
+ "elements: " + de_que);
}
}
Output:
Initial ArrayDeque: [10, 15, 30, 20, 5]
ArrayDeque after removing elements: [30, 20, 5]
- The Java.util.ArrayDeque.remove(Object) method is used to remove a particular element from an ArrayDeque.
Syntax:
Priority_Queue.remove(Object O)
Parameters: The parameter O is of the type of ArrayDeque and specifies the element to be removed from the ArrayDeque.
Return Value: This method returns True if the specified element is present in the Deque else it returns False.
Below programs illustrate the Java.util.ArrayDeque.remove() method:
Program 1:
Java
// Java code to illustrate remove()
import java.util.*;
public class ArrayDequeDemo {
public static void main(String args[])
{
// Creating an empty ArrayDeque
Deque<String> de_que = new ArrayDeque<String>();
// Use add() method to add elements into the Deque
de_que.add("Welcome");
de_que.add("To");
de_que.add("Geeks");
de_que.add("For");
de_que.add("Geeks");
// Displaying the ArrayDeque
System.out.println("Initial ArrayDeque: " + de_que);
// Removing elements using remove() method
de_que.remove("Geeks");
de_que.remove("For");
de_que.remove("Welcome");
// Displaying the ArrayDeque after removal
System.out.println("ArrayDeque after removing "
+ "elements: " + de_que);
}
}
Output:
Initial ArrayDeque: [Welcome, To, Geeks, For, Geeks]
ArrayDeque after removing elements: [To, Geeks]
Program 2:
Java
// Java code to illustrate remove()
import java.util.*;
public class ArrayDequeDemo {
public static void main(String args[])
{
// Creating an empty ArrayDeque
Deque<Integer> de_que = new ArrayDeque<Integer>();
// Use add() method to add elements into the Deque
de_que.add(10);
de_que.add(15);
de_que.add(30);
de_que.add(20);
de_que.add(5);
// Displaying the ArrayDeque
System.out.println("Initial ArrayDeque: " + de_que);
// Removing elements using remove() method
de_que.remove(30);
de_que.remove(5);
// Displaying the ArrayDeque after removal
System.out.println("ArrayDeque after removing "
+ "elements: " + de_que);
}
}
Output:
Initial ArrayDeque: [10, 15, 30, 20, 5]
ArrayDeque after removing elements: [10, 15, 20]
