java stack push

package com.tutorialspoint;

import java.util.*;

public class StackDemo {
   public static void main(String args[]) {

      // creating stack
      Stack st = new Stack();

      // populating stack
      st.push("Java");
      st.push("Source");
      st.push("code");

      // removing top object
      System.out.println("Removed object is: "+st.pop());

      // elements after remove
      System.out.println("Elements after remove: "+st);
   }    
}// Java code to illustrate push() method 
import java.util.*; 
  
public class StackDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty Stack 
        Stack<Integer> STACK = new Stack<Integer>(); 
  
        // Use push() to add elements into the Stack 
        STACK.push(10); 
        STACK.push(15); 
        STACK.push(30); 
        STACK.push(20); 
        STACK.push(5); 
  
        // Displaying the Stack 
        System.out.println("Initial Stack: " + STACK); 
  
        // Pushing elements into the Stack 
        STACK.push(1254); 
        STACK.push(4521); 
  
        // Displaying the final Stack 
        System.out.println("Final Stack: " + STACK); 
    } 
}