Write a Java method called isVowel that checks the received letter is vowel (returns true) or not (returns false). Check the following pre-conditions and post-conditions of this method using assertions which are: pre-condition: the received character (char) must be a letter post-condition: if the letter is vowel the method must return true, otherwise, it returns false. Test your method with different characters (a vowel, a non-vowel, and non-letter)

Write a Java method called isVowel that checks the received letter is vowel (returns true) or not (returns false). Check the following pre-conditions and post-conditions of this method using assertions which are: pre-condition: the received character (char) must be a letter post-condition: if the letter is vowel the method must return true, otherwise, it returns false. Test your method with different characters (a vowel, a non-vowel, and non-letter)

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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(Java) Q 4,5 COMPLETE BOTH STEPS Explain the answer step-by-step and include verbal explanation. Thank you! Given the below class: public class Dog { private String name; private double weight; private static int numDogs = 0; public Dog(String name, double weight) { this.name = name; this.weight = weight; numDogs++; } public String getName() { return name; } public double getWeight() { return weight; } public static int getNumDogs() { return numDogs; }public static void increaseNumDogs() {numDogs++;}public void printGreeting() { System.out.println("Woof!"); } @Override public String toString() { return "Name: " + name + "\nWeight: " + weight; }} Add a method call to getNumDogs to the below starter code: public class DogTest {public static void main(String[] args) { Dog fluffy = new Dog("Fluffy", 10); int num = //call getNumDogs method here }} Then, add a method call…
Write a Java class called ContainsInRange. This class defines a method called contains(), which takes as parameters an integer array a, an integer x, an int called start, as well as an int called end, and returns a boolean which is true if and only if x occurs in a at a position which is greater than or equal to start, and less than end. You must validate that start is less than or equal to end, and that both start and end are greater than or equal to 0, and less than or equal to a.length. Repeat the operation often.
????????:Write the Author class with the required methods to give the following outputs as shown.# Write your codes here.# Do not change the following lines of code.a1 = Author()print("=================================")a1.addBook(“Ice”, “Science Fiction”)print("=================================")a1.setName(“Anna Kavan”)a1.addBook(“Ice”, “Science Fiction”)a1.printDetail()print("=================================")a2 = Author(“Humayun Ahmed”)a2.addBook(“Onnobhubon”, “Science Fiction”)a2.addBook(“Megher Upor Bari”, “Horror”)print(=================================")a2.printDetail()a2.addBook(“Ireena”, “Science Fiction”)print("=================================")a2.printDetail()print("=================================")OUTPUT:=================================A book can not be added without author name=================================Number of Book(s): 1Author Name: Anna KavanScience Fiction: Ice==================================================================Number of Book(s): 2Author Name:…
Implement a class Season that represents a season during a specified year. For purposes of thisproblem, assume that the seasons in each year are, in order, 'Winter', 'Spring', 'Summer', 'Autumn' .__init__, __repr__A Season object is created by calling the constructor and supplying two optional arguments:1. season, defaults to 'Winter'2. calendar year, an int , defaults to 2023For the __repr__ , see the usage below: The next and prev methods modify a Season object by changing it to the next season or previousseason in sequence, respectively. Note that the seasons can "roll over" or "roll back" and that this maychange the year by +/-1. 1. During each year, the seasons occur in this sequence: 'Winter', 'Spring', 'Summer', 'Autumn' 2. next - change to next season, if the current season is Autumn then year will increase by 1 3. prev - change to previous season, if Winter then year will decrease by 1 Implement the == operator ( __eq__ method) to compare two Season…
Need the following method in Java so I can call it in another class to reformat a date entered such as ex.(08/15/21)
4. Write a java program that will check the validity of a password:a. Prompt the user to enter a password (a string, use Scanner class to read the password)b. Check the validity of the password by calling a method, named passValidity()c. Return an appropriate message (i.e. password is valid or invalid) to the main() method. The main() method will print the message.The passValidity() method will:a. take the password as the input parameter,b. check the validity as per the following rule:• the password string must have at least eight characters • the password must have at least one alphabet • the password must contain at least one digit• the password must contain at least one special character from @, #, $, and &c. return an appropriate message to the main() method.Sample output (assuming the input is ab459#de0):The password is validSample output (assuming the input is abcd#de&ui):The password is invalid
use the method setData(String,String,doule,int) to set the employee’s details; and the method getDetails() that will return a descriptive statement about the employee. import java.util.*;class Department { private int groupScore; private double groupAverage; private static int overallScore; private static double overallAverage; public Department(int r1,int r2,int r3,int r4,int r5) { Department.overallScore=Department.overallScore+r1+r2+r3+r4+r5; Department.overallAverage=Department.overallScore/10.0; this.groupScore=r1+r2+r3+r4+r5; this.groupAverage=this.groupScore/5.0; } public double getGroupAvergae() { return this.groupAverage; } public void displayAverage() { System.out.println("Overall Average:"+Department.overallAverage); } }public class Main { public static void main(String args[]) { Department d1=new Department(1,2,3,4,5); d1.displayAverage(); Department d2=new Department(5,4,4,4,1);…
3. Write a Java program to implement a method which prints the Fibonacci series up to nth term. The value of n will be taken from the user in the main() method.Fibonacci series starts with 0 and 1, and the sum of previous two numbers is the next number of the series. For instance, 0, 1, 1 (0 + 1), 2 (1 + 1), 3 (1 + 2), and so on.Sample output [assuming the number of term (n) is 8]:The Fibonacci series: 0 1 1 2 3 5 8 13
Write a program called Deleted_position.java that has a method with one int array as a parameter, and an integer position, where 0<=position<=a.length-1. The method should construct and return an array that is identical to the given array, but with the value in position deleted (Note that the resulting array should have length 1 less than the given array). The output should look like exactly what is pictured below please.
Implement the design of the Student_Tutor class that inherit from Student class so that the following code generates the output below:Hint: Each room has a capacity of 2 Student tutors.class Student: def __init__(self,name,student_id): self.name = name self.student_id = student_id self.semester = "Spring 2022" def details(self): print("Name:",self.name) print("Student_ID:",self.student_id) print("Current Semester:",self.semester)# Write your code here:STs = []S1 = Student("Reem", 18101235)S1.details()print("1.======================================")ST1 = Student_Tutor("Moynul", 16107892, 35, "CSE110", "CSE111")ST2 = Student_Tutor("Priyo", 16107792, 25,"CSE320")ST3 = Student_Tutor("Ronok", 18207892, 36, "CSE110", "CSE111", "CSE221", "CSE220")ST4 = Student_Tutor("Zeba", 19307892, 48, "CSE110")STs.extend([ST1, ST2, ST3, ST4])print("2.======================================")for i in range(len(STs)): STs[i].details()…
python pleaseWrite a class called Point that represents a point in 2D plane.- The constructor accepts the x and y dimensions of the point.- Provide a method getX that returns the x coordinate of a point, and another method getYthat returns the y coordinate of a point.- Provide a method called translate that changes the original coordinates of the point byadding a given values for x and y coordinates.- Provide a method distanceTo that calculates the distance between that point and anotherone.Use this equation to calculate the Distance math.sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2))While the math is a library you should import. Where the (x1, y) is the coordinates of the first pointand (x2, y2) is the coordinates of the second pointThe output should be like this screenshot.
5. Given the Java Point class (which contains two private variables x and y and constructors that allows creating a point object with known x and y values as well as other methods such as equals( ), toString( ) etc), (a). define a new class called Circle that contains private two variables: center which is a Point object from the Point class and radius which is of type double. The Circle class must have the following methods: (b). add a constructor which creates a circle object using a center point with x and y values and a radius as its parameters. (c). add a default constructor. ( (d). add an equals() method that can compare if any object is equal to a Circle object (two circle objects are equal if they have the same center point with the same radius). (e). add a toString() method that prints a Circle object with the center point and radius.