// patterns/recyclec/RecycleC.java// (c)2017 MindView LLC: see Copyright.txt// We make no guarantees that this code is fit for any purpose.// Visit http://OnJava8.com for more book information.// Adding more objects to the recycling problem// {java patterns.recyclec.RecycleC}package patterns.recyclec;import patterns.trash.*;import java.util.*;// A List that admits only the right type:class Tbin<T extends Trash> extends ArrayList<T> {Class<T> binType;Tbin(Class<T> type) {binType = type;}@SuppressWarnings("unchecked")boolean grab(Trash t) {// Comparing class types:if(t.getClass().equals(binType)) {add((T)t); // Downcast to this TBin's typereturn true; // Object grabbed}return false; // Object not grabbed}}class TbinList<T extends Trash>extends ArrayList<Tbin<? extends T>> { // [1]boolean sort(T t) {for(Tbin<? extends T> ts : this)if(ts.grab(t))return true;return false; // bin not found for t}void sortBin(Tbin<T> bin) { // [2]for(T aBin : bin)if(!sort(aBin))System.err.println("Bin not found");}}public class RecycleC {static Tbin<Trash> bin = new Tbin<>(Trash.class);public static void main(String[] args) {// Fill up the Trash bin:ParseTrash.fillBin("trash", bin);TbinList<Trash> trashBins = new TbinList<>();trashBins.add(new Tbin<>(Aluminum.class));trashBins.add(new Tbin<>(Paper.class));trashBins.add(new Tbin<>(Glass.class));// add one line here: [*3*]trashBins.add(new Tbin<>(Cardboard.class));trashBins.sortBin(bin); // [4]trashBins.forEach(Trash::sumValue);Trash.sumValue(bin);}}/* Output: (First and Last 10 Lines)Loading patterns.trash.GlassLoading patterns.trash.PaperLoading patterns.trash.AluminumLoading patterns.trash.Cardboardweight of patterns.trash.Aluminum = 89.0weight of patterns.trash.Aluminum = 76.0weight of patterns.trash.Aluminum = 25.0weight of patterns.trash.Aluminum = 34.0weight of patterns.trash.Aluminum = 27.0weight of patterns.trash.Aluminum = 18.0...________...________...________...________...weight of patterns.trash.Aluminum = 93.0weight of patterns.trash.Glass = 93.0weight of patterns.trash.Paper = 80.0weight of patterns.trash.Glass = 36.0weight of patterns.trash.Glass = 12.0weight of patterns.trash.Glass = 60.0weight of patterns.trash.Paper = 66.0weight of patterns.trash.Aluminum = 36.0weight of patterns.trash.Cardboard = 22.0Total value = 1086.0599818825722*/
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。