QUESTION 27 Given the following code, find the compile error (Choose all that apply). public class Test { public static void main(String[] args) { m(new Graduatestudent()); m(new Student()); m(new Person()); m(new Object()); public static void m(Student x) { System.out.println(x.toString()); class GraduateStudent extends Student { class Student extends Person { @Override public String toString() { return "Student"; class Person extends Object { @Override public String tostring() { return "Person"; m(new Student()) causes an error None of that m(new GraduateStudent()) causes an error m(new Object()) causes an error m(new Person()) causes an error

QUESTION 27 Given the following code, find the compile error (Choose all that apply). public class Test { public static void main(String[] args) { m(new Graduatestudent()); m(new Student()); m(new Person()); m(new Object()); public static void m(Student x) { System.out.println(x.toString()); class GraduateStudent extends Student { class Student extends Person { @Override public String toString() { return "Student"; class Person extends Object { @Override public String tostring() { return "Person"; m(new Student()) causes an error None of that m(new GraduateStudent()) causes an error m(new Object()) causes an error m(new Person()) causes an error

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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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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Beginning tests. UNIT TEST FAILED: addInventory() Tests complete. Note: UNIT TEST FAILED is preceded by 3 spaces. 25 24 public class CallInventoryTag { public static void main(String [] args) { Scanner scnr = new Scanner (System.in); InventoryTag redSweater new InventoryTag(); int sweaterShipment; int sweaterInventoryBefore; 25 26 27 28 29 30 31 32 SweaterInventoryBefore redSweater.getQuantityRemaining() SweaterShipment = scnr.nextInt(); 33 34 System.out.println("Beginning tests."); 35 36 37 11 FIME add unit test for addInventory 38 1o Your solution goes here / 39 42 System.out.printin("Tests complete."); 42 )
8. Identify and write non-static void methods with parameters correctly within a program considering the fact that the parameter list needs to correspond to the order and type in the method signature. * Enter your answer
Identify what is X for the below program to return total. class Sample { static double calculateInterest (double amount) { assert amount > 0 && amount <= 1000; } double interest = 1.2; double total; total interest amount; O return total; public static void main(String[] args) { System.out.println (calculate Interest ( } a. -3.5 O b. 900.5 c. 2300 O d. 4001 8
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…
Incorrect Question 4 Consider public class Species { } // fields private String name; private int population; private double growthRate; // constructor public Species () { } name = "No Name Yet"; population = 0; growthRate = 33.3; Which of the following is the best setter method for the population instance variable? public boolean setPopulation(int newPopulation) { } if (newPopulation>= 0) { } population = newPopulation; return false; } return true; public public void setPopulation (int newPopulation) if (newPopulation>= 0) { } population newPopulation; public void setPopulation (int newPopulation) { population } = newPopulation;
Please help debug this: Debugging Exercise 4-3, Farrell, Joyce, Java Programming, 9th edition, Cengage Learning public class DebugBox { private int width; private int length; private int height; private FixDebugBox() { length = 1; width = 1; height = 1; } public DebugBox(int width, int length, int height) { width = width; length = length; height = height; } public void showData() { System.out.println("Width: " + width + " Length: " + length + " Height: " + height); } public double getVolume() { double vol = length - width - height; return vol; } }
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make proper methods for setting and getting the attributes of the class Student. (Java) attributes: ID , full name, Semester Gender , Age
3. Consider the following two classes and write down the output of the following code: public class Test extends G{ void display() { String s = m1(); System.out.println("My name is "+ s); i - 7; j = j + i; } void show(){ System.out.println(" j value is - } public static void main(String args[]) { Test t - new Test(); System.out.println("s value is = t.display(); t.i = 9; System.out.println("i value in the object="+t.i); System.out.println("j value in the object="+t.j); t.show(); } abstract class G{ String s - "Exam"; int i = 10; int j - 5; String m1(){ s = "Java"; return s; abstract void display(); abstract void show( ); } " + j); + t.s);
Answer it correctly please.