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OneCodeOneTimeOneCodeOneTime
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Tij generic 170530 (#4)
* 170537-Generic * 0528-Generic * Chapter-15-Generic-btp0530
1 parent 3018663 commit 9604e80

9 files changed

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‎src/btp/oneP/ApplyTest.java‎

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package btp.oneP;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.List;
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public class ApplyTest {
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public static void main(String[] args) throws NoSuchMethodException, SecurityException {
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List<Shape> shapes = new ArrayList<Shape>();
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for(int i=0;i<10;i++){
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shapes.add(new Shape());
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}
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Apply.apply(shapes, Shape.class.getMethod("rotate"));
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Apply.apply(shapes, Shape.class.getMethod("resize", int.class), 5);
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List<Square> squares = new ArrayList<Square>();
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for(int i=0;i<10;i++){
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squares.add(new Square());
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}
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Apply.apply(squares, Square.class.getMethod("rotate"));
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Apply.apply(squares, Square.class.getMethod("resize", int.class), 5);
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Apply.apply(new FilledList<Shape>(Shape.class,5), Shape.class.getMethod("rotate"));
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Apply.apply(new FilledList<Shape>(Square.class,18), Shape.class.getMethod("resize", int.class),15);
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SimpleQueue<Shape> shapeQ = new SimpleQueue<Shape>();
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for(int i=0;i<5;i++){
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shapeQ.add(new Shape());
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shapeQ.add(new Square());
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}
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Apply.apply(shapeQ, Shape.class.getMethod("rotate"));
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}
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}
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class Apply{
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public static <T,S extends Iterable<? extends T>> void apply(S seq,Method f,Object...args){
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try{
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for(T t:seq){
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f.invoke(t, args);
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}
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}catch(Exception e){
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throw new RuntimeException();
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}
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}
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}
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class Shape{
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public void rotate(){
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System.out.println(this+" rotate");
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}
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public void resize(int newSize){
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System.out.println(this+" resize"+newSize);
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}
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}
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class Square extends Shape{}
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class FilledList<T> extends ArrayList<T>{
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public FilledList(Class<? extends T> type,int size){
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try{
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for(int i = 0;i<size;i++){
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this.add(type.newInstance());
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}
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}catch(Exception e){
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throw new RuntimeException();
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}
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}
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}
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class SimpleQueue<T> implements Iterable<T>{
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private LinkedList<T> storage = new LinkedList<T>();
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public void add(T t){
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this.storage.offer(t);
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}
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public T get(){
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return this.storage.poll();
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}
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@Override
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public Iterator<T> iterator() {
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return this.storage.iterator();
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}
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}
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‎src/btp/oneP/Decoration.java‎

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package btp.oneP;
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import java.util.Date;
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public class Decoration {
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public static void main(String[] args) {
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TimeStamped t = new TimeStamped(new Basic());
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TimeStamped t2 = new TimeStamped(new SerialNumbered(new Basic()));
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//t2.getSerialNumber();//Not available
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System.out.println(t2.getStamp());
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SerialNumbered s = new SerialNumbered(new Basic());
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SerialNumbered s2 = new SerialNumbered(new TimeStamped(new Basic()));
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SerialNumbered s3 = new SerialNumbered(new TimeStamped(new Basic()));
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System.out.println(s.getSerialNumber());
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System.out.println(s2.getSerialNumber());
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System.out.println(s3.getSerialNumber());
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//s2.getStamp();//Not available
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}
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}
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class Basic{
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private String value;
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public void set(String value){
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this.value = value;
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}
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public String get(){
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return value;
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}
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}
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class Decorator extends Basic{
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protected Basic basic;
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public Decorator(Basic basic){
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this.basic = basic;
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}
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public void set(String val){
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basic.set(val);
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}
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public String get(){
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return basic.get();
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}
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}
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class TimeStamped extends Decorator{
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private final long timeStamp;
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public TimeStamped(Basic basic) {
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super(basic);
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timeStamp = new Date().getTime();
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}
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public long getStamp(){
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return timeStamp;
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}
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}
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class SerialNumbered extends Decorator{
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private static long counter = 1;
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private final long serialNumber = counter++;
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public SerialNumbered(Basic basic) {
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super(basic);
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}
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public long getSerialNumber(){
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return serialNumber;
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}
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}

‎src/btp/oneP/DecoratorTest.java‎

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package btp.oneP;
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import java.util.ArrayList;
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import java.util.List;
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public class DecoratorTest {
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@SuppressWarnings("static-access")
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public static void main(String[] args) {
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OriginalCoffee originalCoffee = new OriginalCoffee();
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double priceMilk = 10.0;
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Milk milkCoffee = new Milk(originalCoffee,priceMilk);
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milkCoffee.mixing();
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System.out.println("当前咖啡中的配料："+milkCoffee.foodList);
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System.out.println("当前咖啡价格："+milkCoffee.getPrice());
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System.out.println("---------------------------");
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double priceMatcha = 20.0;
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Matcha matchaCoffee = new Matcha(milkCoffee,priceMatcha);
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matchaCoffee.mixing();
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System.out.println("当前咖啡中的配料："+matchaCoffee.foodList);
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System.out.println("当前咖啡价格："+matchaCoffee.getPrice());
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System.out.println("---------------------------");
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double priceChocolate = 30.0;
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Chocolate chocolateCoffee = new Chocolate(matchaCoffee,priceChocolate);
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chocolateCoffee.mixing();
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System.out.println("当前咖啡中的配料："+chocolateCoffee.foodList);
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System.out.println("当前咖啡价格："+chocolateCoffee.getPrice());
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System.out.println("---------------------------");
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}
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}
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/**
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* 装饰品和被装饰器的共同接口
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*
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*/
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interface CoffeeTaste{
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//返回价格
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double getPrice();
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//搅拌咖啡
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void mixing();
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}
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/**
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* 原始的被装饰器
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*
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*/
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class OriginalCoffee implements CoffeeTaste{
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private String name;
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public OriginalCoffee(){
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name = "原味咖啡";
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System.out.println("原味咖啡的价格是：50");
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}
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@Override
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public double getPrice() {
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//原味咖啡的价钱
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return 50;
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}
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@Override
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public void mixing() {
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System.out.println("--搅拌咖啡");
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}
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}
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/**
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* 装饰品的共同父类
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*
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*/
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abstract class SnacksAndDesserts implements CoffeeTaste{
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public static List<String> foodList= new ArrayList<String>();
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//小食和甜品的价格
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private double additionalPrice;
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//要加入小食和甜品的咖啡
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CoffeeTaste coffeeTaste;
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public SnacksAndDesserts(CoffeeTaste coffeeTaste,double additionalPrice){
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this.coffeeTaste = coffeeTaste;
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this.additionalPrice = additionalPrice;
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}
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//返回价格
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@Override
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public double getPrice() {
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double priceNow = coffeeTaste.getPrice()+additionalPrice;
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return priceNow;
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}
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abstract void add();
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}
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/**
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* 牛奶类
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*
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*/
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class Milk extends SnacksAndDesserts{
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public Milk(CoffeeTaste coffeeTaste, double additionalPrice) {
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super(coffeeTaste, additionalPrice);
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System.out.println("O(∩_∩)O~~牛奶的价格是："+additionalPrice);
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}
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@Override
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void add() {
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System.out.println("--咖啡中加入牛奶");
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SnacksAndDesserts.foodList.add("牛奶");
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}
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@Override
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public void mixing() {
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add();
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System.out.println("--牛奶加入咖啡中搅拌");
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}
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}
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/**
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* 抹茶类
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*/
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class Matcha extends SnacksAndDesserts{
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public Matcha(CoffeeTaste coffeeTaste, double additionalPrice) {
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super(coffeeTaste, additionalPrice);
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System.out.println("O(∩_∩)O~~抹茶的价格是："+additionalPrice);
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}
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@Override
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void add() {
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System.out.println("--咖啡中混入抹茶");
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SnacksAndDesserts.foodList.add("抹茶");
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}
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@Override
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public void mixing() {
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add();
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System.out.println("--抹茶加入咖啡中搅拌");
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}
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}
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/**
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* 巧克力类
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*/
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class Chocolate extends SnacksAndDesserts{
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public Chocolate(CoffeeTaste coffeeTaste, double additionalPrice) {
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super(coffeeTaste, additionalPrice);
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System.out.println("O(∩_∩)O~~巧克力的价格是："+additionalPrice);
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}
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@Override
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void add() {
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System.out.println("--咖啡中加入巧克力");
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SnacksAndDesserts.foodList.add("巧克力");
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}
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@Override
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public void mixing() {
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add();
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System.out.println("--咖啡加入咖啡中搅拌");
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}
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}

‎src/btp/oneP/DogsAndRobots.java‎

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package btp.oneP;
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public class DogsAndRobots {
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public static void main(String[] args) {
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PerformingDog d = new PerformingDog();
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Robott r = new Robott();
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Communicate.perform(d);
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Communicate.perform(r);
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}
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}
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interface Performs{
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void speak();
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void sit();
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}
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class PerformingDog extends Dog implements Performs{
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@Override
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public void speak() {
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System.out.println("Woof!");
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}
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@Override
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public void sit() {
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System.out.println("Sitting!");
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}
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public void reproduce(){}
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}
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class Robott implements Performs{
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@Override
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public void speak() {
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System.out.println("Click!");
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}
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@Override
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public void sit() {
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System.out.println("Clank!");
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}
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public void oilChange(){}
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}
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class Communicate{
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public static <T extends Performs> void perform(T performs){
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performs.speak();
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performs.sit();
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}
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//下面和上面的一样，不构成重载
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/*public static void perform(Performs p){
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p.speak();
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p.sit();
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}*/
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}

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