再做咖啡馆java项目时
以下是读取文件的代码FileCatalogLoader
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.*;
public class FileCatalogLoader implements CatalogLoader{
private Product readProduct(String line)
throws DataFormatException{
StringTokenizer token=new StringTokenizer(line,"_");
if(token.countTokens()!=6) {
throw new DataFormatException(line);
}else {
try {
String prefix=token.nextToken();
return new Product(token.nextToken(),token.nextToken(),Double.parseDouble(token.nextToken()));
}
catch(NumberFormatException nfe) {
throw new DataFormatException(line);
}
}
}
private Coffee readCoffee(String line)
throws DataFormatException{
StringTokenizer token=new StringTokenizer(line,"_");
if(token.countTokens()!=10) {
throw new DataFormatException(line);
}else {
try {
String prefix=token.nextToken();
return new Coffee(token.nextToken(),token.nextToken(),Double.parseDouble(token.nextToken()),token.nextToken(),token.nextToken(),token.nextToken(),token.nextToken(),token.nextToken(),token.nextToken());
}
catch(NumberFormatException nfe) {
throw new DataFormatException(line);
}
}
}
private CoffeeBrewer readCoffeeBrewer(String line)
throws DataFormatException{
StringTokenizer token=new StringTokenizer(line,"_");
if(token.countTokens()!=7) {
throw new DataFormatException(line);
}else {
try {
String prefix=token.nextToken();
return new CoffeeBrewer(token.nextToken(),token.nextToken(),Double.parseDouble(token.nextToken()),token.nextToken(),token.nextToken(),Integer.parseInt(token.nextToken()));
}
catch(NumberFormatException nfe) {
throw new DataFormatException(line);
}
}
}
public Catalog loadCatalog(String filename)
throws FileNotFoundException,
IOException,
DataFormatException{
Catalog catalog=new Catalog();
BufferedReader read= new BufferedReader(new FileReader(filename));
String line =read.readLine();
while(line!=null) {
Product item=null;
if(line.startsWith("Product")) {
item=readProduct(line);
}
else if(line.startsWith("Coffee")) {
item=readCoffee(line);
}
else if(line.startsWith("CoffeeBrewer")) {
item=readCoffeeBrewer(line);
}
else {
throw new DataFormatException(line);
}
catalog.addProduct(item);
line =read.readLine();
}
return catalog;
}
}
用
import java.io.*;
import java.util.*;
/**
* Tests the class <code>FileCatalogLoader</code>
*
* @author author name
* @version 1.0.0
* @see FileCatalogLoader
*/
public class TestFileCatalogLoader {
/* Standard output stream */
private static PrintWriter stdOut = new PrintWriter(System.out, true);
/* Standard error stream */
private static PrintWriter stdErr = new PrintWriter(System.err, true);
/**
* Tests methods of class {@link FileCatalogLoader}
*
* @param args not used.
* @throws IOException if an I/O error occurs.
*/
public static void main (String args[]) throws IOException {
TestFileCatalogLoader tester =
new TestFileCatalogLoader();
tester.testLoadCatalog();
stdOut.println("All tests passed");
}
/**
* Displays a message in the standard error stream if the value specified
* by parameter <code>condition<code> is <code>false</code>.
*
* @param message the error message.
* @param condition the test condition.
* @return the value of <code>condition</code>
*/
public static void assertTrue(String message, boolean condition) {
if (!condition) {
stdErr.print("** Test failure ");
stdErr.println(message);
System.exit(1);
}
}
/**
* Displays a message in the standard error stream.
*
* @param message the error message.
* @return <code>false</code>;
*/
public static void fail(String message) {
stdErr.print("** Test failure ");
stdErr.println(message);
System.exit(1);
}
/**
* Tests the method <code>loadCatalog</code>.
*
* @return <code>true</code> if all test passed; otherwise returns
* <code>false</code>.
* @throws IOException if an I/O error occurs.
*/
public void testLoadCatalog() throws IOException {
CatalogLoader loader = new FileCatalogLoader();
try {
// Testing an empty file
Catalog emptyCatalog =
loader.loadCatalog("D:\\学习\\面向对象\\JAVA\\面向对象\\作业\\项目\\Coffee//empty.dat");
assertTrue("1, testing method read with an empty file",
emptyCatalog instanceof Catalog);
assertTrue("2, testing method read with an empty file"
+ emptyCatalog.getNumberOfProducts() + " products loaded",
emptyCatalog.getNumberOfProducts() == 0);
// Testing a not empty file
Catalog catalog =
loader.loadCatalog("catalog.dat");
assertTrue("3, testing method loadCatalog",
catalog instanceof Catalog);
assertTrue("4, testing method loadCatalog: "
+ catalog.getNumberOfProducts() + " products loaded",
catalog.getNumberOfProducts() == 26);
// Testing product C001
Product product = catalog.getProduct("C001");
assertTrue("5, testing method loadCatalog" + product.toString(),
product instanceof Coffee);
Coffee coffeeC001 = (Coffee) product;
assertTrue("6, testing method loadCatalog: " +
coffeeC001.toString(),
coffeeC001.getCode().equals("C001") &&
coffeeC001.getDescription().equals("Colombia, Whole, 1 lb") &&
coffeeC001.getPrice() == 17.99 &&
coffeeC001.getOrigin().equals("Colombia") &&
coffeeC001.getRoast().equals("Medium") &&
coffeeC001.getFlavor().equals("Rich and Hearty") &&
coffeeC001.getAroma().equals("Rich") &&
coffeeC001.getAcidity().equals("Medium") &&
coffeeC001.getBody().equals("Full"));
// Testing product C002
product = catalog.getProduct("C002");
assertTrue("7, testing method loadCatalog: " + product.toString(),
product instanceof Coffee);
Coffee coffeeC002 = (Coffee) product;
assertTrue("8, testing method loadCatalog: " +
coffeeC002.toString(),
coffeeC002.getCode().equals("C002") &&
coffeeC002.getDescription().equals("Colombia, Ground, 1 lb") &&
coffeeC002.getPrice() == 18.75 &&
coffeeC002.getOrigin().equals("Colombia") &&
coffeeC002.getRoast().equals("Medium") &&
coffeeC002.getFlavor().equals("Rich and Hearty") &&
coffeeC002.getAroma().equals("Rich") &&
coffeeC002.getAcidity().equals("Medium") &&
coffeeC002.getBody().equals("Full"));
// Testing product A001
product = catalog.getProduct("A001");
assertTrue("9, testing method loadCatalog: " + product.toString(),
product instanceof Product);
assertTrue("10, testing method loadCatalog: " +
product.toString(),
product.getCode().equals("A001") &&
product.getDescription().equals("Almond Flavored Syrup") &&
product.getPrice() == 9.0);
// Testing product B002
product = catalog.getProduct("B002");
assertTrue("11, testing method loadCatalog: " + product.toString(),
product instanceof CoffeeBrewer);
CoffeeBrewer brewerB002 = (CoffeeBrewer) product;
assertTrue("12, testing method loadCatalog: " +
brewerB002.toString(),
brewerB002.getCode().equals("B002") &&
brewerB002.getDescription().equals("Coffee Brewer, 2 Warmers") &&
brewerB002.getPrice() == 200.0 &&
brewerB002.getModel().equals("Brewer 200") &&
brewerB002.getWaterSupply().equals("Pourover") &&
brewerB002.getNumberOfCups() == 12);
} catch (Exception e) {
fail("13, testing method loadCatalog: " + e.getMessage());
}
}
}
测试时报错
通过直接编译和自己调试产生的错误不同
**一下是FileCatalogLoader所读取的文件内容catalog.dat
- <input type="checkbox" disabled="" />
- <input type="checkbox" disabled="" />
- <input type="checkbox" disabled="" /> **
Coffee_C001_Colombia, Whole, 1 lb_17.99_Colombia_Medium_Rich and Hearty_Rich_Medium_Full
Coffee_C002_Colombia, Ground, 1 lb_18.75_Colombia_Medium_Rich and Hearty_Rich_Medium_Full
Coffee_C003_Italian Roast, Whole, 1 lb_16.80_Latin American Blend_Italian Roast_Dark and heavy_Intense_Low_Medium
Coffee_C004_Italian Roast, Ground, 1 lb_17.55_Latin American Blend_Italian Roast_Dark and heavy_Intense_Low_Medium
Coffee_C005_French Roast, Whole, 1 lb_16.80_Latin American Blend_French Roast_Bittersweet, full intense_Intense, full_None_Medium
Coffee_C006_French Roast, Ground, 1 lb_17.55_Latin American Blend_French Roast_Bittersweet, full intense_Intense, full_None_Medium
Coffee_C007_Guatemala, Whole, 1 lb_17.99_Guatemala_Medium_Rich and complex_Spicy_Medium to high_Medium to full
Coffee_C008_Guatemala, Ground, 1 lb_18.75_Guatemala_Medium_Rich and complex_Spicy_Medium to high_Medium to full
Coffee_C009_Sumatra, Whole, 1 lb_19.99_Sumatra_Medium_Vibrant and powdery_Like dark chocolate_Gentle_Rich and full
Coffee_C010_Sumatra, Ground, 1 lb_20.50_Sumatra_Medium_Vibrant and powdery_Like dark chocolate_Gentle_Rich and full
Coffee_C011_Decaf Blend, Whole, 1 lb_16.80_Latin American Blend_Dark roast_Full, roasted flavor_Hearty_Bold and rich_Full
Coffee_C012_Decaf Blend, Ground, 1 lb_17.55_Latin American Blend_Dark roast_Full, roasted flavor_Hearty_Bold and rich_Full
Brewer_B001_Home Coffee Brewer_150.00_Brewer 100_Pourover_6
Brewer_B002_Coffee Brewer, 2 Warmers_200.00_Brewer 200_Pourover_12
Brewer_B003_Coffee Brewer, 3 Warmers_280.00_Brewer 210_Pourover_12
Brewer_B004_Commercial Coffee, 20 Cups_380.00_Quick Coffee 100_Automatic_20
Brewer_B005_Commercial Coffee, 40 Cups_480.00_Quick Coffee 200_Automatic_40
Product_A001_Almond Flavored Syrup_9.00
Product_A002_Irish Creme Flavored Syrup_9.00
Product_A003_Mint Flavored syrup_9.00
Product_A004_Caramel Flavored Syrup_9.00
Product_A005_Gourmet Coffee Cookies_12.00
Product_A006_Gourmet Coffee Travel Thermo_18.00
Product_A007_Gourmet Coffee Ceramic Mug_8.00
Product_A008_Gourmet Coffee 12 Cup Filters_15.00
Product_A009_Gourmet Coffee 36 Cup Filters_45.00
在其中涉及到代码
import java.util.Iterator;
import java.util.Vector;
public class Catalog {
private Vector products;
public Catalog() {
products=new Vector();
}
public void addProduct(Product product) {
products.add(product);
}
public Iterator getProductsIterator() {
return products.iterator();
}
public Product getProduct(String code) {
Iterator it=products.iterator();
while(it.hasNext()) {
Product pro=(Product)it.next();
if(pro.getCode()==code) {
return pro;
}
}
return null;
}
public int getNumberOfProducts() {
return products.size();
}
public String[] getCodes() {
String[] str=null;
int i=0;
Iterator it=products.iterator();
while(it.hasNext()) {
Product pro=(Product)it.next();
str[i]=str[i]+pro.getCode();
i++;
}
return str;
}
}
package coffee;
import java.awt.*;
import javax.swing.*;
/**
* This class models a coffee product. It extends
* {@link Product} and adds the following information:
* <ol>
* <li>the origin of the coffee, a <code>String</code></li>
* <li>the roast of the coffee, a <code>String</li>
* <li>the flavor of the coffee, a <code>String</li>
* <li>the aroma of the coffee, a <code>String</li>
* <li>the acidity of the coffee, a <code>String</li>
* <li>the body of the product, a <code>double</li>
* </ol>
*
* @author author name
* @version 1.0.0
* @see Product
*/
public class Coffee extends Product {
/* Origin of the coffee. */
private String origin;
/* Roast of the coffee. */
private String roast;
/* Flavor of the coffee. */
private String flavor;
/* Aroma of the coffee. */
private String aroma;
/* Acidity of the coffee.*/
private String acidity;
/* Body of the coffee */
private String body;
/**
* Constructs a <code>Coffee</code> object.
*
* @param initialCode the code of the product.
* @param initialDescription a short description of the product.
* @param initialPrice the price of the product.
* @param initialOrigin the origin of coffee.
* @param initialRoast the kind of roast of the coffee.
* @param initialFlavor the flavor of the coffee.
* @param initialAroma the aroma of the coffee.
* @param initialAcidity the acidity of the coffee.
* @param initialBody the body of the coffee.
*/
public Coffee(String initialCode, String initialDescription,
double initialPrice, String initialOrigin,
String initialRoast, String initialFlavor,
String initialAroma, String initialAcidity,
String initialBody) {
super(initialCode, initialDescription, initialPrice);
origin = initialOrigin;
roast = initialRoast;
flavor = initialFlavor;
aroma = initialAroma;
acidity = initialAcidity;
body = initialBody;
}
/**
* Returns the origin of this coffee.
*
* @return the origin of this coffee.
*/
public String getOrigin() {
return origin;
}
/**
* Returns the roast of this coffee.
*
* @return the roast of this coffee.
*/
public String getRoast() {
return roast;
}
/**
* Returns the flavor of this coffee.
*
* @return the flavor of this coffee.
*/
public String getFlavor() {
return flavor;
}
/**
* Returns the aroma of this coffee.
*
* @return the aroma of this coffee.
*/
public String getAroma() {
return aroma;
}
/**
* Returns the acidity of this coffee.
*
* @return the acidity of this coffee.
*/
public String getAcidity() {
return acidity;
}
/**
* Returns the body of this coffee.
*
* @return the body of this coffee.
*/
public String getBody() {
return body;
}
/**
* Returns the string representation of this coffee.
*
* @return the string representation of this coffee.
*/
public String toString() {
return super.toString() + "_" + getOrigin() + "_" + getRoast() + "_"
+ getFlavor() + "_" + getAroma() + getAcidity() + "_"
+ getBody();
}
/**
* Obtains a {@link JPanel} object with the information of this
* coffee product.
*
* @return a {@link JPanel} with the information of this coffee product.
*/
public JPanel getPanel() {
JLabel origin=new JLabel("Origin");
JTextField originText=new JTextField(10);
JLabel roast=new JLabel("Roast");
JTextField roastText=new JTextField(10);
JLabel flavor=new JLabel("Flavor");
JTextField flavorText=new JTextField(10);
JLabel aroma=new JLabel("Aroma");
JTextField aromaText=new JTextField(10);
JLabel acidity=new JLabel("Acidity");
JTextField acidityField=new JTextField(10);
JLabel body=new JLabel("Body");
JTextField bodyText=new JTextField(10);
JPanel panel=super.getPanel();
panel.add(origin);
panel.add(originText);
panel.add(roast);
panel.add(roastText);
panel.add(flavor);
panel.add(flavorText);
panel.add(aroma);
panel.add(aromaText);
panel.add(acidity);
panel.add(acidityField);
panel.add(body);
panel.add(bodyText);
return panel; // REMOVE; USED SO THIS FILE COMPILES
}
}
import java.awt.*;
import javax.swing.*;
/**
* This class models a coffee brewer. It extends {@link Product} and adds the
* following information:
* <ol>
* <li>the model of the coffee brewer, a <code>String</code></li>
* <li>the water supply ("Pour-over" or "Automatic")</li>
* <li>the capacity expressed in number of cups, a <code>int</code></li>
* </ol>
*
* @author author name
* @version 1.0.0
* @see Product
*/
public class CoffeeBrewer extends Product {
/* Model of the coffee brewer. */
private String model;
/* The water supply of the coffee brewer ("Pour-over" or "Automatic"). */
private String waterSupply;
/* The capacity expressed in number of cups. */
private int numberOfCups;
/**
* Constructs a <code>CoffeeBrewer</code> object.
*
* @param initialCode the code of the product.
* @param initialDescription a short description of the product.
* @param initialPrice the price of the product.
* @param initialModel the model of the coffee brewer.
* @param initialWaterSupply the water supply is ("Pour-over" or
* "Automatic").
* @param initialNumberOfCups the capacity expressed in number of cups.
*/
public CoffeeBrewer(String initialCode, String initialDescription,
double initialPrice, String initialModel,
String initialWaterSupply, int initialNumberOfCups) {
super(initialCode, initialDescription, initialPrice);
model = initialModel;
waterSupply = initialWaterSupply;
numberOfCups = initialNumberOfCups;
}
/**
* Returns the model of this coffee brewer.
*
* @return the model of this coffee brewer.
*/
public String getModel() {
return model;
}
/**
* Returns the type of water supply.
*
* @return returns "Pour-over" or "Automatic".
*/
public String getWaterSupply() {
return waterSupply;
}
/**
* Returns the capacity of this coffee brewer expressed in number of cups.
*
* @return the capacity of this coffee brewer expressed in number of cups.
*/
public int getNumberOfCups() {
return numberOfCups;
}
/**
* Returns the string representation of this coffee brewer.
*
* @return the string representation of this coffee brewer.
*/
public String toString() {
return super.toString() + "_" + getModel() + "_" + getWaterSupply()
+ "_" + getNumberOfCups();
}
/**
* Obtains a {@link JPanel} object with the information of this coffee
* brewer.
*
* @return a <code>JPanel</code> with the information of this coffee brewer.
*/
public JPanel getPanel() {
JPanel panel=super.getPanel();
JLabel model=new JLabel("Model");
JLabel water=new JLabel("Source of Water");
JLabel cups=new JLabel("Numbers of Cups");
JTextField modelText=new JTextField(10);
JTextField waterText=new JTextField(10);
JTextField cupsText=new JTextField(10);
panel.add(model);
panel.add(modelText);
panel.add(water);
panel.add(waterText);
panel.add(cups);
panel.add(cupsText);
return panel; // REMOVE; USED SO THIS FILE COMPILES
}
}
import java.awt.*;
import javax.swing.*;
/**
* This class models a product sold by the Gourmet Coffee store.
* It contains the following information:
* <ol>
* <li>the code of the product, a <code>String</code></li>
* <li>a short description of the product, a <code>String</code></li>
* <li>the price of the product, a <code>double</code></li>
* </ol>
*
* @author author name
* @version 1.0.0
*/
public class Product {
/* Code of the product. */
private String code;
/* Description of the product. */
private String description;
/* Price of the product. */
private double price;
/**
* Constructs a <code>Product</code> object.
*
* @param initialCode the code of the product.
* @param initialDescription the description of the product.
* @param initialPrice the price of the product.
*/
public Product(String initialCode, String initialDescription,
double initialPrice) {
code = initialCode;
description = initialDescription;
price = initialPrice;
}
/**
* Returns the code of this product.
*
* @return the code of this product.
*/
public String getCode() {
return code;
}
/**
* Returns the description of this product.
*
* @return the descripton of this product.
*/
public String getDescription() {
return description;
}
/**
* Returns the price of this product.
*
* @return price of this product.
*/
public double getPrice() {
return price;
}
/**
* Returns <code>true</code> if code of this product is
* equal to code of the argument.
* </p>
*
* @param object object with which this product is compared.
* @return <code>true</code> if code of this product is
* equal to code of the argument; <code>false</code> otherwise.
*/
public boolean equals(Object object) {
return object instanceof Product
&& getCode().equals(((Product) object).getCode());
}
/**
* Returns the string representation of this product.
*
* @return the string representation of this product.
*/
public String toString() {
return getCode() + "_" + getDescription() + "_" + getPrice();
}
/**
* Obtains a {@link JPanel} object with the information of this product.
*
* @return a <code>JPanel</code> with the information of this product.
*/
public JPanel getPanel() {
JLabel code;
JLabel description;
JLabel price;
JTextField codeText=new JTextField(10);
JTextField descriptionText=new JTextField(10);
JTextField priceText=new JTextField(10);
price=new JLabel("Price");
code=new JLabel("code");
description=new JLabel("Description");
JPanel panel=new JPanel();
panel.setLayout(new GridLayout(9,2));
panel.add(code);
panel.add(codeText);
panel.add(description);
panel.add(descriptionText);
panel.add(price);
panel.add(priceText);
return panel; // REMOVE; USED SO THIS FILE COMPILES
}
}
直接运行的错误：** Test failure 13, testing method loadCatalog: Brewer_B001_Home Coffee Brewer_150.00_Brewer 100_Pourover_6
debug的错误：** Test failure 13, testing method loadCatalog: Coffee_C001_Colombia, Whole, 1 lb_17.99_Colombia_Medium_Rich and Hearty_Rich_Medium_Full
