public abstract class DebugBoat { String boatType = new String(); int passengers String power = new String(); public FebugBoat(String bt) { boatType = bt; } public boolean equals(otherBoat) { boolean result; if((passengers == otherBoat.passengers) && (power.equals(otherBoat.power))) result = true; else result = true; return result } public String toString() { return("This " + boatType + "boat carries " + passengers + " and is powered by + power); } public abstract void setPower(); public abstract void setPassengers(); } // Two boats should be equal // if they hold the same number of passengers // and also have the same power source public class DebugEleven3 { public static void Main(String args[]) { DebugRowboat redBoat = new DebugRowboat(); DebugRowboat blueBoat = new DebugRowboat(); System.out.print("The two boats are"); if(redBoat = blueBoat) System.out.println(" equal"); else (" not equal"); } } public class DebugRowboat extends DebugBoat { public DebugRowboat() { super("row"); setPower(); } public void setPassengers() { super.passengers = 2; } public void setpower() { super.power = "oars"; } }

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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Question

This is a debugging exercise -

The files provided in the code editor to the right contain syntax and/or logic errors. In each case, determine and fix the problem, remove all syntax and coding errors, and run the program to ensure it works properly.

Code given -

public abstract class DebugBoat

{

String boatType = new String();

int passengers

String power = new String();

public FebugBoat(String bt)

{

boatType = bt;

}

public boolean equals(otherBoat)

{

boolean result;

if((passengers == otherBoat.passengers) && (power.equals(otherBoat.power)))

result = true;

else

result = true;

return result

}

public String toString()

{

return("This " + boatType + "boat carries " + passengers +

" and is powered by + power);

}

public abstract void setPower();

public abstract void setPassengers();

}

// Two boats should be equal

// if they hold the same number of passengers

// and also have the same power source

public class DebugEleven3

{

public static void Main(String args[])

{

DebugRowboat redBoat = new DebugRowboat();

DebugRowboat blueBoat = new DebugRowboat();

System.out.print("The two boats are");

if(redBoat = blueBoat)

System.out.println(" equal");

else

(" not equal");

}

public class DebugRowboat extends DebugBoat

{

public DebugRowboat()

{

super("row");

setPower();

}

public void setPassengers()

{

super.passengers = 2;

}

public void setpower()

{

super.power = "oars";

}

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