steps involved in making a strong passward

// Declare data fields: a String named customerName, // an int named numItems, and // a double named totalCost.// Your code here... // Implement the default contructor.// Set the value of customerName to "no name"// and use zero for the other data fields.// Your code here... // Implement the overloaded constructor that// passes new values to all data fields.// Your code here... // Implement method getTotalCost to return the totalCost.// Your code here... // Implement method buyItem.//// Adds itemCost to the total cost and increments// (adds 1 to) the number of items in the cart.//// Parameter: a double itemCost indicating the cost of the item.public void buyItem(double itemCost){// Your code here... }// Implement method applyCoupon.//// Apply a coupon to the total cost of the cart.// - Normal coupon: the unit discount is subtracted ONCE// from the total cost.// - Bonus coupon: the unit discount is subtracted TWICE// from the total cost.// - HOWEVER, a bonus coupon only applies if the…

Java Given main(), complete the SongNode class to include the printSongInfo() method. Then write the Playlist class' printPlaylist() method to print all songs in the playlist. DO NOT print the dummy head node.

Create two linkedBag objects of type string in main. Place 5 strings in the first bag and five strings in the second bag. Then your code must test if the two linkedBag objects are equal or not. You must traverse both linkedBags and test each items to see if they are the same. Then you must display a message saying the two linkedBags are the same or different.  Using Java compiler.

def reverse_all(names_lst):    """    ##############################################################    # TODO: Replace this block of comments with your own         #    # method description and add at least 3 more doctests below. #    ##############################################################     >>> names_lst = ["Emma", "Liam", "Olivia", "Noah", "Ava"]    >>> reverse_all(names_lst)    ['ammE', 'maiL', 'aivilO', 'haoN', 'avA']    >>> names_lst = ["William"]    >>> reverse_all(names_lst)    ['mailliW']    >>> names_lst = ["Isabella", "Oliver", "Mia"]    >>> reverse_all(names_lst)    ['allebasI', 'revilO', 'aiM']     # Add your own doctests below    """    if not names_lst:        return []    else:        reversed_name = names_lst[0][::-1]        return [reversed_name] + reverse_all(names_lst[1:]) I'm confused about recursion how does reverse_all(names_lst[1:]) reverse all the strings? why do i need to list + for the first…

User.java User is a class that represents a user in the music player application. Every User contains a library which stores all their Playlists. A User can create Playlists or add Playlists made by other users to their library. Additionally, they can also share Playlists with other Users. Each User has the following attributes: username - Represents the username of the user The name of a user should never be null library Represents the library of the User. A list that contains all the playlists the user has created or added. Every user's library will start with a playlist called "Liked" which stores the songs that the user has liked. This playlist should have a creation Date of 0. Save for the Liked playlist, a user's library should be sorted in order of recency. That is, a more recently created playlist should appear earlier than an older one. currentPlaying Represents the song the user is currently listening to. -If it is null, then the user is not listening to any song. User should…

How do I create this class in Java? Contact Class Requirements The contact object shall have a required unique contact ID string that cannot be longer than 10 characters. The contact ID shall not be null and shall not be updatable. The contact object shall have a required firstName String field that cannot be longer than 10 characters. The firstName field shall not be null. The contact object shall have a required lastName String field that cannot be longer than 10 characters. The lastName field shall not be null. The contact object shall have a required phone String field that must be exactly 10 digits. The phone field shall not be null. The contact object shall have a required address field that must be no longer than 30 characters. The address field shall not be null.