//debug 2, chapter 11

//java programming, joyce farrell, 8th ed

//output

1 // An array for different boat types 2 public class DebugEleven2 3 { 4 public static void main(String[] args) 5 { 6 DebugBoat[] ref = FixDebugBoat[3]; 7 DebugRowboat blueBoat = DebugRowboat(); 8 DebugRowboat redBoat = DebugRowboat(); 9 DebugOceanLiner bigBoat = DebugOceanLiner(); 10 ref[0] = redBoat; 11 ref[1] = blueBoat; 12 ref[1] = bigBoat; 13 for(int x = 0; x < refLength; ++x) 14 { 15 ref[x].setPassengers(); 16 ref[x].setPower(); 17 ref[x].toString(); 18 } 19 } 20 } 21

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1 public abstract class DebugBoat 2 { 3 String boatType = new String(); 4 int passengers; 5 String power = new String(); 6 public DebugBoat(String bt) 7 { 8 boatType = bt; 9 } 10 // override equals() method to satisfy 11 // requirements of Debug Exercise 3. 12 public boolean equals(DebugBoat otherBoat) 13 { 14 boolean result; 15 if((passengers == otherBoat.passengers) && (power.equals(otherBoat.power))) 16 result = true; 17 else 18 result = false; 19 return result; 20 } 21 public String toString() 22 { 23 return("This " + boatType + "boat carries " + passengers + 24 " and is powered by " + power); 25 } 26 public abstract void setPower(); 27 public abstract void setPassengers(); 28 }

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1 public class DebugOceanLiner extends DebugBoat 2 { 3 public DebugOceanLiner() 4 { 5 Debug("ocean liner "); 6 setPassengers(); 7 setPower(); 8 } 9 public void setPassengers() 10 { 11 super.passengers = 2400; 12 } 13 public void power() 14 { 15 super.power = "four engines"; 16 } 17 } 18

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1 public class DebugRowboat extends DebugBoat 2 { 3 public DebugRowboat() 4 { 5 super("row"); 6 } 7 public void setPassengers() 8 { 9 super.passengers = 2; 10 } 11 public void setPower() 12 { 13 super.power = "oars"; 14 } 15 }