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- Create a Visible interface with two methods: makeVisible and makeInvisible. Both methods should accept no parameters and return a boolean value. Explain how a class may implement this interface.Create a test project to play with the Comparable interface. Edit the Card class to implement Comparable . Cards are to be compared using their value. They are considered the same if they have the value. One is less than the other if its value is less. Add the compareTo method that takes a Card object as a argument and returns 0 meaning the values are the same, 1 meaning the card is greater than the parameter, -1 meaning the card is less than the parameter. Create a main() that creates a Deck. Use your code from the program that dealt out Cards from a Deck and showed the hands but this time, now that Cards are comparible, show them in sorted order using Arrays.sort if the had is an array, or Collections.sort if the hand is an ArrayList. Show the hands. Document, document, document!In this assignment, you will implement part of a bigger program that deals with jewelry. You must submit the full implementation for the following interface: public interface JewelryBagInterface { public boolean addJewelryItem(int id, Jewelry j, double weight); public boolean removeJewelryItem(int id); public double getTotalWeight (); public double getTotalPrice (); public double getTotalGoldWeight (); public double getTotalSilverWeight (); public double getTotalBronzeWeight (); public void printBagContents(); public void setMaximumWeight (double max_weight); public void removeAllGoldItems(); public void removeAllsilverItems (); public void removeAllBronzeItems (); public int getTotalNumberOfitems(); public int getTotalNumberOfGoldItems (); public int getTotalNumberOfSilverItems (); public int getTotalNumberOfBronzeItems (); The interface JewelryBag java is available on Moodle (including the method descriptions). In your Java program, define the following enumerated type: Public enum…
- For simple usage of GUIs, why would the source codes (shown below) not work?(a) The input/output objects have not been properly handled.(b) The data type of the methods has been defined in a wrong way.(c) The necessary parameters in the methods have not been assigned properly.(d) The flow of execution has been applied in a wrong way. import javax.swing.JOptionPane;public class Palindrome{public static void main(String[] args) //main method{long num1, num2; //variables to store the numbersString inputStr, outputStr; // strings to receive from the user// and displayinputStr=JOptionPane.showInputDialog("Enter the number: ");num1 = Long.parseLong(inputStr); // change the string tonum2 = num1; // numbersif (num1 <= 0){num1 = - num1; //if the numbers are negative, change the sign inputStr = inputStr.valueOf(num1);//change the inputStr value } if (isPalindrome(inputStr))outputStr = num2 + " is a palindrome";elseoutputStr = num2 + " is not a palindrome";JOptionPane.showMessageDialog(null,…2. Write an interface for Tossable. We will say that every Tossable item has a way to toss it and we want to be able to give its color. A Tossable item by default is to throw an assist toss to another player.Questions 1. Printing click coordinates. Build a custom subclass of JComponent which listens for MouseEvents, after observing a click, it should just print the coordinates, as in "Click detected at (X,Y)." (but with actual coordinates for X and Y). This means your class should also implement the MouseListener interface, and register itself as a listener in the constructor. Write a main method which creates a new JFrame and adds an instance of your class to the frame. Name your custom class EventLabCanvas (or anything else you prefer. You may want to refer to lecture code posted on May 30th to get started. 2. Drawing circles centered on clicks. Add code to make your canvas draw a small filled circle on itself when it receives a mouseClicked event. The circle should be centered on the location of the click. (Hint: use JComponent.getGraphics () and Graphics.fill0val() in your implementation of the mouseClicked method.) 3. Connecting circles with lines. Modify your canvas so that it draws…
- An interface can have : instance variables. only method headings without implementation. some methods with implementation. only one constructor.Note: write a Java Program given below Create a class Component with properties width, height and color. Define the public methods draw, paint. Now, define few child classes of Component i.e. RadioButton, Checkbox, Button and List. Override the base methods and provide appropriate behaviors. Now create few instances of child components, call the methods paint and draw with these child classes.Challenge exercise The following object creation will result in the constructor of the Date class being called. Can you write the constructor’s header? new Date("March", 23, 1861) Try to give meaningful names to the parameters
- Is it possible for a method within an interface to be marked as final? Why or why not?Why is it necessary for a class to implement a destructor? Fill in the blanks with your response.How many different ways can you think of to indicate that a method has received incorrect parameter values or is otherwise unable to complete its task? Consider as many different sorts of applications as you can—for instance: those with a GUI; those with a textual interface and a human user; those with no sort of interactive user, such as software in a vehicle’s enginemanagement system; or software in embedded systems such as a cash machine.