Stack empty() Method in Java

The java.util.Stack.empty() method in Java is used to check whether a stack is empty or not. The method is of boolean type and returns true if the stack is empty else false.

Syntax:

STACK.empty()

Parameters: The method does not take any parameters.

Return Value: The method returns boolean true if the stack is empty else it returns false.

Below programs illustrate the working of java.util.Stack.empty() method:
Program 1:



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// Java code to demonstrate empty() method
import java.util.*;
  
public class Stack_Demo {
    public static void main(String[] args)
    {
  
        // Creating an empty Stack
        Stack<String> STACK = new Stack<String>();
  
        // Stacking strings
        STACK.push("Geeks");
        STACK.push("4");
        STACK.push("Geeks");
        STACK.push("Welcomes");
        STACK.push("You");
  
        // Displaying the Stack
        System.out.println("The stack is: " + STACK);
  
        // Checking for the emptiness of stack
        System.out.println("Is the stack empty? " + 
                                      STACK.empty());
  
        // Popping out all the elements
        STACK.pop();
        STACK.pop();
        STACK.pop();
        STACK.pop();
        STACK.pop();
  
        // Checking for the emptiness of stack
        System.out.println("Is the stack empty? " + 
                                     STACK.empty());
    }
}

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Output:


The stack is: [Geeks, 4, Geeks, Welcomes, You]
Is the stack empty? false
Is the stack empty? true





Program 2:











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// Java code to demonstrate empty() method 


import java.util.*; 


  


public class Stack_Demo { 


    public static void main(String[] args) 


    { 


  


        // Creating an empty Stack 


        Stack<Integer> STACK = new Stack<Integer>(); 


  


        // Stacking int values 


        STACK.push(8); 


        STACK.push(5); 


        STACK.push(9); 


        STACK.push(2); 


        STACK.push(4); 


  


        // Displaying the Stack 


        System.out.println("The stack is: " + STACK); 


  


        // Checking for the emptiness of stack 


        System.out.println("Is the stack empty? " +  


                                      STACK.empty()); 


    } 


} 



















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Output:


The stack is: [8, 5, 9, 2, 4]
Is the stack empty? false






          
          
          
          

            

    

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