Java Deque pop() Method

The pop() method of Java Deque interface is used to pop an element from the given stack represented by this deque. We can also say that the above method removes and return the first element of the deque. The above method is similar to removeFirst() method.

Syntax:

Parameter:

Return:

The above method is used to return the element at the front of the given deque.

Throw:

NoSuchElementException- If the given deque is empty.

Example 1

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequepopExample1 {
    public static void main(String[] args) {
		Deque<String> deque = new ArrayDeque<>();
	    deque.offer("Apple");
	    deque.offer("Guava");
	    deque.offer("Mango");
	    deque.offer("Pear");
	   String val =  deque.pop();
	  System.out.println("The first fruit which has been removed is : "+val);   
	  System.out.println("The final deque is given as : ");   
	  for (String string : deque) {
		System.out.println(string);
	  }
   }
}

Test it Now

Output:

The first fruit which has been removed is : Apple
The final deque is given as : 
Guava
Mango
Pear

Example 2

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequepopExample2 {
    public static void main(String[] args) {
		Deque<Float> deque = new ArrayDeque<>();
	    deque.offer(67f);
	    deque.offer(55f);
	    deque.offer(78f);
	    deque.offer(77f);
	   Float val =  deque.pop();
	  System.out.println("The first number which has been removed is : "+val);   
	  System.out.println("The final deque is given as : ");   
	  for (Float float1 : deque) {
		System.out.println(float1);
	}
   }
}

Test it Now

Output:

The first number which has been removed is : 67.0
The final deque is given as : 
55.0
78.0
77.0

Example 3

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequepopExample3 {
    public static void main(String[] args) {
		Deque<Character> deque = new ArrayDeque<>();
	    deque.offer('a');
	    deque.offer('b');
	    deque.offer('c');
	    deque.offer('d');
	   Character val =  deque.pop();
	  System.out.println("The first character which has been removed is : "+val);   
	  System.out.println("The final deque is given as : ");   
	  for (Character character : deque) {
		System.out.println(character);
	}
   }
}

Test it Now

Output:

The first character which has been removed is : a
The final deque is given as : 
b
c
d

Next TopicJava Deque

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