What is the output of the following code with explanation:- class Teacher { public Teacher() { System.out.println("Teacher class constructor called"); } } public class Student extends Teacher { public Student() { System.out.println("Student class constructor called"); } public static void main (String args[]) { Student s = new Student(); } }

What is the output of the following code with explanation:- class Teacher { public Teacher() { System.out.println("Teacher class constructor called"); } } public class Student extends Teacher { public Student() { System.out.println("Student class constructor called"); } public static void main (String args[]) { Student s = new Student(); } }

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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1 class MetOv{ 2- void sum(int i, int j){ 3 System.out.println(i); } 4 void sum(String c,String d){ 5 System.out.println(c+d); } 6- void sum(double x,double y){ 7 System.out.println(x+y); 8 }} 9 10 - public class Run{ 11 public static void main(String[] args) 12- { 13 Metov a=new Metov (); 14 a.sum("JA","VA"); 15 a.sum(5.0,10.e); 4. 16 17 }} Answer:
c) Draw a UML Diagram for the following source code. (CLO1, CLO2) public class MyCircle { double MyRadius= 0.0; MyCircle() { } MyÇircle(double newRadius) { MyRadius = newRadius; } double getArea() { return MyRadius * MyRadius * 3.14159;} public static void main(String[] args) { MyCircle C1 = new MyCircle(); C1 MyRadius = 2.0; MyCircle C2 = new MyCircle(); C2.MyRadius = 4.0; System.out.println(C1.getArea()); System.out println(C2,getArea(); } }
For the code below: public class College extends Student { public static void main(String[ ] args) { new College( ); } public College ( ) { this(“First semester"); System.out.println( "Third year" ); } public College (string G ) { System.out.println(G); } } class Student extends S_info { public Student ( ) { System.out.println("Student No. 123"); } public Student (String S) { System.out.println(S); } } class S_info{ public S_info ( ) { System.out.println("student age: 21"); } } 1- Draw the diagram for the constructor chaining. 2- Put the values for the strings G and S. 3- Trace the output for the entire code.
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Consider :Cat c = new tiger();What will be the result of c.getWieght();
Q7) What is o/p of following program public class Parent { public static void staticMethod(){ System.out.println("Inside Parent static"); } public static void main(String[] args) { Parent p = new Child(); p.staticMethod(); } } class Child extends Parent { public static void staticMethod() { System.out.println("Inside Child static"); } } Answers a) Inside Parent static b) Inside Child static c) Compilte time error.
Instructions-Java Assignment is to define a class named Address. The Address class will have three private instance variables: an int named street_number a String named street_name and a String named state. Write three constructors for the Address class: an empty constructor (no input parameters) that initializes the three instance variables with default values of your choice, a constructor that takes the street values as input but defaults the state to "Arizona", and a constructor that takes all three pieces of information as input Next create a driver class named Main.java. Put public static void main here and test out your class by creating three instances of Address, one using each of the constructors. You can choose the particular address values that are used. I recommend you make them up and do not use actual addresses. Run your code to make sure it works. Next add the following public methods to the Address class and test them from main as you go: Write getters and…
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Provide the missing code segment in the portion with the TO DO remark in the following sample code. The Book class involved in the code is provided below: public class Book implements Comparable<Book> { protected int pages; public Book(){ pages = 1500; } public Book(int pages){ this.pages = pages; } public void setPages(int pages) { this.pages = pages; } public int getPages() { return pages; } public int compareTo(Book another) { // if same then return 0 if(this.pages == another.pages) return 0; //if current has more than return 1 else return -1 else if (this.pages > another.pages) return 1; else return -1; } }
(In Java language) Create a class Called NetflixDemo Create two objects “user1” and “user2” of the Netflix class pictured below) Set various class variables for the Netflix class using these two objects. Call various methods of Netflix class using these two objects. public class Netflix {public String movies [] = new String[10];public String trendingTop5 [] = new String[5];public String continueWatching [] = new String[5];public String username;public String password;private boolean isAuthenticated;public double balance;public int subscriberSinceYear;public static void logininfo() {Scanner input = new Scanner(System.in);System.out.println("Enter the username");String username = input.nextLine();System.out.println("Enter the password");String password = input.nextLine();boolean isAuthenticated = true;System.out.println(isAuthenticated + " , You have successfully logged in ");System.out.println();}public static void trendingList(){Scanner input = new…
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