Homework Answers
super(); //Automatically inserted here in .class file of Child.
Compilation error.
These are the correct statements with the above code.
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Class Parent {Parent(String s) {System.out.println("S1");}} class Child extends Parent {public Child()...
What is the output of the following code? class parent { public void someFunction() { System.out.println("Parent...
What is the output of the following code? class parent { public void someFunction() { System.out.println("Parent Function"); } } public class child extends parent { public void someFunction() { System.out.println("Child Function"); } public static void main(String args) { parent p1 = new parent(); parent p2 = new child(); child c1 = new child(); p1.someFunction(); p2.someFunction(); c1.someFunction(); } }
what is the output of running class Launcher? class parent { public Parent{ System.out.println( "The default...
what is the output of running class Launcher? class parent { public Parent{ System.out.println( "The default constructor of Parent is invoked"); } } class Child extends Parent { public Child(); System.out.println( "The default constructor of Child is invoked"); } } public class Launcher { public static void main(String[] args) { Child c = new Child(); } a. no output since the main method does not have System.out.println() b."The default constructor of Child is invoked" c. "The default constructor of Parent...
public class Game{ public void players() { System.out.println(“1 or more”); } } public class Chess extends...
public class Game{ public void players() { System.out.println(“1 or more”); } } public class Chess extends Game { public void boardSize() { System.out.println(“8 by 8”); } public void players() { System.out.println(“2”); } } public class ThreeDChess extends Chess{ public void boardSize() {System.out.println(“7 levels”); } public void hasMoveableBoard() { System.out.println(“true”); } } Assume that these statements have already executed: Game g = new Game(); Chess c = new Chess(); ThreeDChess t = new ThreeDChess(); Object og = g; Game gc =...
public class SquareTest { public static void main(String[] args) { System.out.println("Number...
public class SquareTest { public static void main(String[] args) { System.out.println("Number of sides is " + Square.NUM_OF_SIDES); Square s1 = new Square(-5.7f); System.out.println(s1); s1.setLength(0.001f); System.out.println(s1.getLength()); s1.setLength(-9999); System.out.println(s1.getLength()); System.out.println("Number of sides is " + s1.NUM_OF_SIDES); s1.calculateArea(); } }...
class Test public static void main(String args) { Aa=new AO: a.printo: class A private String s;...
class Test public static void main(String args) { Aa=new AO: a.printo: class A private String s; public A (String news) { 8 = news: public void print { System.out.println(s): The program would compile and run if you change A a new Alto Aa=new A('5'). The program has a compilation error because the instance variables in class A is not public. The program has a compilation error because class A does not have a no-arguments constructor The program compiles and runs...
What causes an assertion error in JAVA on this? Code: public class Student extends Staff {...
What causes an assertion error in JAVA on this? Code: public class Student extends Staff { private String s1; private String s2; public Student (String firstName, String lastName, String s1, String s2) { this.s1 = s1; this.s2 = s2; } public boolean equals(Person s){ if (s == null) return false; return ((this.s1).equals(this.s2)); } } Test Case: public void areTheyEqualTest() { Student s1 = new Student( FIRST_NAME, LAST_NAME); ...
I need help with this Mammal: public class Mammal extends Pet{ String Vaccin...
I need help with this
Mammal:
public class Mammal extends Pet{
String Vaccination="";
public Mammal(String name, String parent, String
species, String birthday, String Vaccination) {
//Accessing
the super class Constructor and setting the variables.
super(name,parent,species, birthday);
this.Vaccination=Vaccination;
} // end Mammal
public String getVaccination() {
return
Vaccination;
} // end getVaccination
public void setVaccination(String
Vaccination) {
this.Vaccination =
Vaccination;
} // end setVaccination
@Override
public String toString() {
return
super.toString()+". This Mammal requires following vaccinations "+
Vaccination;
} // end...
What is output? public abstract class People { protected string name; protected int age; public abstract...
What is output? public abstract class People { protected string name; protected int age; public abstract void PrintInfo(); public void PrintInformation() { System.out.println("In Base Class People"); public class Teacher extends People { private int experience; public void PrintInfo() { System.out.println("In Child Class Teacher"); public class Principal extends Teacher { public void PrintInformation() { System.out.println("In Child Class Principal"); public static void main(String args[]) { Principal tim; tim = new Principal(); tim.PrintInfo(); In Base Class People Error: Compiler error In Child Class...
For Questions 1-3: consider the following code: public class A { private int number; protected String...
For Questions 1-3: consider the following code: public class A { private int number; protected String name; public double price; public A() { System.out.println(“A() called”); } private void foo1() { System.out.println(“A version of foo1() called”); } protected int foo2() { Sysem.out.println(“A version of foo2() called); return number; } public String foo3() { System.out.println(“A version of foo3() called”); Return “Hi”; } }//end class A public class B extends A { private char service; public B() { super(); System.out.println(“B() called”);...
For Questions 1-3: consider the following code: public class A { private int number; protected String...
For Questions 1-3: consider the following code: public class A { private int number; protected String name; public double price; public A() { System.out.println(“A() called”); } private void foo1() { System.out.println(“A version of foo1() called”); } protected int foo2() { Sysem.out.println(“A version of foo2() called); return number; } public String foo3() { System.out.println(“A version of foo3() called”); Return “Hi”; } }//end class A public class B extends A { private char service; public B() { super(); System.out.println(“B() called”); } public...
class Test public static void main(String args) { Aa=new AO: a.printo: class A private String s; public A (String news) { 8 = news: public void print { System.out.println(s): The program would compile and run if you change A a new Alto Aa=new A('5'). The program has a compilation error because the instance variables in class A is not public. The program has a compilation error because class A does not have a no-arguments constructor The program compiles and runs...
I need help with this
Mammal:
public class Mammal extends Pet{
String Vaccination="";
public Mammal(String name, String parent, String
species, String birthday, String Vaccination) {
//Accessing
the super class Constructor and setting the variables.
super(name,parent,species, birthday);
this.Vaccination=Vaccination;
} // end Mammal
public String getVaccination() {
return
Vaccination;
} // end getVaccination
public void setVaccination(String
Vaccination) {
this.Vaccination =
Vaccination;
} // end setVaccination
@Override
public String toString() {
return
super.toString()+". This Mammal requires following vaccinations "+
Vaccination;
} // end...
What is output? public abstract class People { protected string name; protected int age; public abstract void PrintInfo(); public void PrintInformation() { System.out.println("In Base Class People"); public class Teacher extends People { private int experience; public void PrintInfo() { System.out.println("In Child Class Teacher"); public class Principal extends Teacher { public void PrintInformation() { System.out.println("In Child Class Principal"); public static void main(String args[]) { Principal tim; tim = new Principal(); tim.PrintInfo(); In Base Class People Error: Compiler error In Child Class...
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