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P: 11
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I'm writing a program that reads information from three seperate classes. Here is my code: -
public class Animal
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{
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protected int id;
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protected String type;
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protected double mass;
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//------------------------------------------------------------------------
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// Sets up an animal with the specified ID number, type and weight.
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//------------------------------------------------------------------------
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public Animal (int animalID, String animalType, double weight)
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{
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id = animalID;
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type = animalType;
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mass = weight;
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}
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//------------------------------------------------------------------------
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// Returns information about this animal as a string.
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//------------------------------------------------------------------------
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public String toString()
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{
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String description = "ID: " + id + "\n";
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description += "Type: " + type + "\n";
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description += "Weight: " + mass + "\n";
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return description;
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}
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}
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public class Pet extends Animal
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{
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private String title;
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private String own;
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//------------------------------------------------------------------------
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// Sets up a pet using the specified information.
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//------------------------------------------------------------------------
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public Pet (int animalID, String animalType, double weight, String name, String owner)
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{
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super (animalID, animalType, weight);
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title = name;
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own = owner;
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}
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//------------------------------------------------------------------------
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// Returns information about this pet as a string.
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//------------------------------------------------------------------------
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public String toString()
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{
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String description = super.toString();
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description += "Name: " + title + "\n";
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description += "Owner: " + own + "\n";
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return description;
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}
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}
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public class ZooAnimal extends Animal
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{
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private int cage;
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private String train;
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//------------------------------------------------------------------------
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// Sets up a zoo animal using the specified information.
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//------------------------------------------------------------------------
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public ZooAnimal (int animalID, String animalType, double weight, int cageNumber, String trainer)
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{
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super (animalID, animalType, weight);
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cage = cageNumber;
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train = trainer;
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}
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//------------------------------------------------------------------------
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// Returns information about this zoo animal as a string.
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//------------------------------------------------------------------------
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public String toString()
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{
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String description = super.toString();
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description += "Cage: " + cage + "\n";
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description += "Trainer: " + train + "\n";
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return description;
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}
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}
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import java.util.Scanner;
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import java.util.StringTokenizer;
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import java.io.*;
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public class FileRead
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{
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public static void main (String[] args) throws FileNotFoundException
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{
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Scanner scan = new Scanner(new File("animal.txt"));
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String animalType = null, name = null, trainer = null, owner = null, input = null;
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int animalID = 0, cageNumber = 0, animalTotal = 0, petTotal = 0, zooTotal = 0;
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double weight = 0.0;
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StringTokenizer st = null;
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Animal animal = null;
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Pet pet = null;
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ZooAnimal zooAnimal = null;
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System.out.println("\nThis program lists information from a series");
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System.out.println("of animals, pets and zoo animals from a seperate");
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System.out.println("text file. It prints theID number, animal type");
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System.out.println("and weight of each, if the animal is also a pet,");
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System.out.println("in addition. If the animal is a zoo animal, then");
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System.out.println("then a name and owner a cage number and trainer");
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System.out.println("will be added.\n");
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while (scan.hasNextLine())
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{
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input = scan.nextLine();
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st = new StringTokenizer(input, ",");
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animalID = Integer.parseInt(st.nextToken());
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animalType = st.nextToken();
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weight = Double.parseDouble(st.nextToken());
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if (animalID > 1000 && animalID < 3000)
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{
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animal = new Animal (animalID, animalType, weight);
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System.out.println(animal);
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animalTotal++;
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}
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if (animalID > 3000 && animalID < 8000)
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{
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name = st.nextToken();
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owner = st.nextToken();
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pet = new Pet(animalID, animalType, weight, name, owner);
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System.out.println(pet);
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petTotal++;
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}
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if (animalID > 8000 && animalID < 10000)
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{
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cageNumber = Integer.parseInt(st.nextToken());
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trainer = st.nextToken();
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zooAnimal = new ZooAnimal(animalID, animalType, weight, cageNumber, trainer);
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System.out.println(zooAnimal);
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zooTotal++;
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}
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if (animalID > 9999 && animalID < 1000)
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{
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System.out.println("The ID number is invalid.");
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}
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}
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System.out.println("\nNumber of animals total: " + animalTotal + ".");
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System.out.println("Number of pets total: " + petTotal + ".");
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System.out.println("Number of zoo animals total: " + zooTotal + ".");
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FileWriter fw = new FileWriter("animalout.txt");
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BufferedWriter bw = new BufferedWriter(fw);
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PrintWriter pw = new PrintWriter(bw);
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pw.println(animal.createOutputFile());
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pw.close();
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}
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}
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The following code segment is animal.txt -
1200,Ape,65.2,
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5000,Cow,600.8,Bessie,Stu DeFranco,
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7999,Dog,13.4,Arf,George Aycoth,
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8050,Giraffe,830.3,103,Samuel Trujillo,
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9700,Snake,23.0,239,Monica Trevizo,
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I'm trying to write the object's data type to the output file, "animalout.txt", but I keep getting an error reading:
FileRead.java:79: cannot find symbol
symbol : method createOutputFile()
location: class Animal
pw.println(animal.createOutputFile());
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