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2010-06-01T05:02:26Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Coffee example using decorators ==



<source lang="java">
interface Countable {
String getName();
float getCount();
}
class Book implements Countable {
public String getName() {
return "Book";
}
public float getCount() {
return 0;
}
}
abstract class Number implements Countable {
protected Countable component;
Number(Countable component) {
this.ruponent = component;
}
public float getCount() {
return component.getCount();
}
public abstract String getName();
}
class Integer extends Number {
private float value = 0.75f;
private String description = " integer";
public Integer(Countable component) {
super(component);
}
public float getCount() {
return component.getCount() + value;
}
public String getName() {
return component.getName() + description;
}
}
class Float extends Number {
private String description = " float";
public Float(Countable component) {
super(component);
}
public String getName() {
return component.getName() + description;
}
}
class Double extends Number {
private float value = 0.25f;
private String description = " double";
public Double(Countable component) {
super(component);
}
public float getCount() {
return component.getCount() + value;
}
public String getName() {
return component.getName() + description;
}
}
class Decimal extends Number {
private float value = 0.25f;
private String description = " decimal";
public Decimal(Countable component) {
super(component);
}
public float getCount() {
return component.getCount() + value;
}
public String getName() {
return component.getName() + description;
}
}
class Positive extends Number {
private float cost = 0.25f;
private String description = " positive";
public Positive(Countable component) {
super(component);
}
public float getCount() {
return component.getCount() + cost;
}
public String getName() {
return component.getName() + description;
}
}
class Negative extends Number {
private float value = -0.25f;
private String description = " negative";
public Negative(Countable component) {
super(component);
}
public float getCount() {
return component.getCount() + value;
}
public String getName() {
return component.getName() + description;
}
}
public class NumberCountableDemo {
public static void main(String[] args) {
Countable cappuccino = new Integer(new Double(new Book()));
System.out.println(cappuccino.getName().trim() + ": $" + cappuccino.getCount());
Countable cafeMocha = new Integer(new Decimal(new Negative(new Positive(new Float(
new Book())))));
System.out.println(cafeMocha.getName().trim() + ": $" + cafeMocha.getCount());
}
}</source>



== combinations and decorators ==



<source lang="java">
interface Countable {
float getValue();
String getName();
}
class Book implements Countable {
private String description = "books";
private float value = 0.75f;
public float getValue() {
return value;
}
public String getName() {
return description;
}
}
class Dog implements Countable {
private String description = "dogs";
private float cost = 1;
public float getValue() {
return cost;
}
public String getName() {
return description;
}
}
class Cat implements Countable {
private float cost = 1;
private String description = "Cat";
public float getValue() {
return cost;
}
public String getName() {
return description;
}
}
class Child implements Countable {
private float cost = 1;
private String description = "child";
public float getValue() {
return cost;
}
public String getName() {
return description;
}
}
class Cow implements Countable {
private float cost = 1.25f;
private String description = "Cow";
public float getValue() {
return cost;
}
public String getName() {
return description;
}
}
abstract class Number implements Countable {
protected Countable component;
public Number(Countable component) {
this.ruponent = component;
}
public float getValue() {
return component.getValue();
}
public String getName() {
return component.getName();
}
}
class MyBook extends Number {
private float cost = 0.75f;
public MyBook(Countable component) {
super(component);
}
public String getName() {
return component.getName() + " my books";
}
public float getValue() {
return cost + component.getValue();
}
}
class Integer extends Number {
private float cost = 0.50f;
public Integer(Countable component) {
super(component);
}
public float getValue() {
return cost + component.getValue();
}
public String getName() {
return component.getName() + " integer";
}
}
class Float extends Number {
public Float(Countable component) {
super(component);
}
public String getName() {
return component.getName() + " float";
}
}
class Double extends Number {
public Double(Countable component) {
super(component);
}
public String getName() {
return component.getName() + " double";
}
}
class Decimal extends Number {
public Decimal(Countable component) {
super(component);
}
public String getName() {
return component.getName() + " decimal";
}
}
public class CountableDemo {
public static void main(String[] args) {
Countable cappuccino = new Cat();
System.out.println(cappuccino.getName() + ": $" + cappuccino.getValue());
Countable cafeMocha = new Integer(new Float(new Cow()));
System.out.println(cafeMocha.getName() + ": $" + cafeMocha.getValue());
}
}</source>



== Creating and Extending Objects with the Decorator Patterns ==



<source lang="java">
public class MainClass {
public static void main(String args[]) {
Computer computer = new Computer();
computer = new Disk(computer);
computer = new Monitor(computer);
computer = new CD(computer);
computer = new CD(computer);
System.out.println("You"re getting a " + computer.description() + ".");
}
}
class Disk extends ComponentDecorator {
Computer computer;
public Disk(Computer c) {
computer = c;
}
public String description() {
return computer.description() + " and a disk";
}
}
class CD extends ComponentDecorator {
Computer computer;
public CD(Computer c) {
computer = c;
}
public String description() {
return computer.description() + " and a CD";
}
}
class Computer {
public Computer() {
}
public String description() {
return "computer";
}
}
abstract class ComponentDecorator extends Computer {
public abstract String description();
}
class Monitor extends ComponentDecorator {
Computer computer;
public Monitor(Computer c) {
computer = c;
}
public String description() {
return computer.description() + " and a monitor";
}
}</source>

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Admin: 1 версия

в 17:44, 31 мая 2010