What constant names are defined in the java.lang.Math class?

Why does the Number Class from this slide need to be abstract?

In Java intellej Correct this code and add the following 1.Correct: (The error shows a problem under () next to "firstBeachShoot.printPhotoDetails") 2.Add the following to the second package (screenshot): 1.for or for...each or while loops. 2.Arrays 3.default, no-args and parameterized constructors. Here's the first package : import java.util.Scanner;public class Image {int numberOfPhotos; // photos on rolldouble fStop; // light let it 1.4,2.0,2.8 ... 16.0int iso; // sensativity to light 100,200, 600int filterNumber; // 1-6String subjectMatter;String color; // black and white or colorString location;boolean isblurry;public String looksBlurry(boolean key) {if (key == true) {return "Photo is Blurry";} else {return "Photo is Clear";}}public void printPhotoDetails(String s1) {Scanner br = new Scanner(System.in);String subjectMatter = s1;System.out.println("Data of Nature photos:");System.out.println("Enter number of photos:");numberOfPhotos = br.nextInt();int i = 1;while...

How do I creat a switch statement in java for directions? Ex. North, South, East, West.

Write in Java! Write the Widget class. a. A widget has a name and price. b. The default for name should be "widget" c. Write a constructor (not the no-args), all getters and setters. d. Add a toString method. e. Create an object of type Widget.

Make a java airline reservation system. Things the program should have: - Main menu(options to cancel, book and reschedule flights) - Use things like constructors, array lists, etc. - System.out.println your final ticket with the date of the flight, number and airline.

Using this link: https://docs.oracle.com/javase/tutorial/java/concepts/interface.html and https://docs.oracle.com/javase/tutorial/java/concepts/class.html Create in Java: An interface named bicycle as described in the section: What is an interface? Add a new method for the interface bicycle: ring the bell with a parameter indicating how many time. Pick a bicycle brand and create a new class of bicycles for that brand, as described in the sections What is an interface? and What is a Class? For the new method implementation, write in the console "Clang! Clang!..." for how many times the parameter indicates. Create another class, with a main method, in which you will take a trip aroound your house, changing your bicycle attributes, starting and ending from a complete stop, and ringing the bell once at start and twice at the end. Use as inspiration the method in What is a Class? Your trip must have at least 5 different parts in which you change your bicycle...

Programming in java