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Stack hashCode() method in Java with Example

Last Updated : 24 Dec, 2018
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The Java.util.Stack.hashCode() method in Java is used to get the hashcode value of this Stack. Syntax: 
Stack.hashCode()
Parameters: The method does not take any parameter. Return Value: The method returns hash code value of this Stack which is of Integer type. Below programs illustrate the Java.util.Stack.hashCode() method: Program 1: Stack with string elements. Java 
// Java code to illustrate hashCode()
import java.util.*;

public class StackDemo {
    public static void main(String args[])
    {
        // Creating an empty Stack
        Stack<String> stack = new Stack<String>();

        // Use add() method to add elements into the Stack
        stack.add("Welcome");
        stack.add("To");
        stack.add("Geeks");
        stack.add("4");
        stack.add("Geeks");

        // Displaying the Stack
        System.out.println("Stack: " + stack);

        // Displaying the hashCode value of Stack
        System.out.println("The hashCode value is: "
                           + stack.hashCode());
    }
}
Output: 
Stack: [Welcome, To, Geeks, 4, Geeks]
The hashCode value is: -878886256
Program 2: Stack with integer elements. Java 
// Java code to illustrate hashCode()
import java.util.*;

public class StackDemo {
    public static void main(String args[])
    {
        // Creating an empty Stack
        Stack<Integer> stack = new Stack<Integer>();

        // Use add() method to add elements into the Stack
        stack.add(10);
        stack.add(20);
        stack.add(30);
        stack.add(40);
        stack.add(50);

        // Displaying the Stack
        System.out.println("Stack: " + stack);

        // Displaying the hashCode value of Stack
        System.out.println("The hashCode value is: "
                           + stack.hashCode());
    }
}
Output: 
Stack: [10, 20, 30, 40, 50]
The hashCode value is: 38490301

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