Enum implements the vending machine

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Enum vending machine 1. Define the input commands accepted by the vending machine:

Package Com.enumtest.enumstatemac;import Java.util.arrays;import Java.util.Random; Public enumInput {nickel (5), DIME (Ten), QUARTER ( -), DOLLAR ( -), Toothpaste ( $), CHIPS ( the), SODA ( -), SOAP ( -), Abort_transaction { Public int amout() {Throw NewRuntimeException ("Abort.amout ()"); }}, STOP {//Last instance         Public int amout() {Throw NewRuntimeException ("Shut.amout ()"); }    };//Commodity price    int value; Input (int value) { This.value=value; } Input () {}intAmount () {return value; }StaticRandom Rand =NewRandom ( -); Public StaticInputrandomselection() {//Dont include STOP:        returnVALUES () [Rand.nextint (values (). Length-1)]; } Public Static void Main(string[] args) {    }}

2. Vending Machine class

Package Com.enumtest.enumstatemac;importStaticNet.mindview.util.print.*;import Java.util.enummap;import Java.util.iterator;import Java.util.logging.Logger; Import Net.mindview.util.textfile;import com.java.array.generator.Generator;enumCategory {//define Category enum instanceMoney (Input.nickel, Input.dime, Input.quarter, Input.dollar), Item_selection (Input.toothpaste, Input.CHIPS, Input.soda, Input.soap), Quit_transaction (input.abort_transaction), Shut_down (input.stop);//Initialize Input instance    PrivateInput[] values;    Category (Input ... types) {values = types; }Private StaticEnummap<input, category> categories =NewEnummap<input, category> (Input.class);//Fill categories < input, according to the corresponding menu of input >    Static{ for(Category c:category.class.getenumconstants ()) for(Input type:c.values) categories.put (type, c); }//Get the appropriate category menu according to the input     Public StaticCategory categorize (input input) {returnCategories.get (input); }} Public  class vendingmachine {    //default machine state is resting    Private Staticstate state = state.resting;//default machine amount =0 coin amount    Private Static intAmount =0;Private StaticInput selection =NULL;enumstateduration {TRANSIENT}//Tagging enum    The Status enumeration instance of the machine is as follows:    //Standby Status Coin status shipment status Change status interrupt operation status    enumState {//Different reactions according to the input content        //Standby status will be performed:RESTING {voidNext (Input input) {Try{System.out.println ("Now state:"+ State +"Resting:input:"+ input); Thread.Sleep (10000L); }Catch(Interruptedexception e) {//TODO auto-generated catch blockE.printstacktrace (); }Switch(Category.categorize (input)) {//If the input is an amount of 1. Coin amount Setting 2. Machine status set to coin                 CaseMoney:amount + = Input.amount (); state = Adding_money; Break;// break to where                //If the shutdown                 CaseShut_down:state = TERMINAL;//Why???                default:                }            }        },//If the machine is in coin state will be executed:Adding_money {voidNext (Input input) {Try{System.out.println ("Now state:"+ State +"Adding_money:input:"+ input); Thread.Sleep ( theL); }Catch(Interruptedexception e) {//TODO auto-generated catch blockE.printstacktrace (); }Switch(Category.categorize (input)) {//Continue coin Operation                 CaseMoney:amount + = Input.amount (); Break;//Select item Operation                 CaseItem_selection:selection = input;//Insufficient amount                    if(Amount < Selection.amount ()) Print ("Insufficient money for"+ selection);Else                        //Shipping statusstate = dispensing; Break;//Cancel Operation                 CaseQuit_transaction:// changestate = Giving_change; Break;//Off                 CaseShut_down:state = TERMINAL;default:                }            }        },//ShippingDispensing (stateduration.transient) {voidNext () {Try{System.out.println ("Now state:"+ State +"Dispensing:input:"); Thread.Sleep ( theL); }Catch(Interruptedexception e) {//TODO auto-generated catch blockE.printstacktrace (); }//shipping, charge, set to change statusPrint"Here's your"+ selection);                Amount-= Selection.amount ();            state = Giving_change; }}, Giving_change (stateduration.transient) {voidNext () {Try{System.out.println ("Now state:"+ State +"Giving_change:input:"); Thread.Sleep ( theL); }Catch(Interruptedexception e) {//TODO auto-generated catch blockE.printstacktrace (); }//Change to standby                if(Amount >0) {print ("Your Change:"+ amount); Amount =0;            } state = RESTING; }}, TERMINAL {voidOutput () {print ("halted"); }        };Private BooleanIstransient =false; State () {} state (Stateduration trans) {istransient =true; }//Operation status: Standby state coin Status This method must be overridden        voidNext (Input input) {Throw NewRuntimeException (" only Call"+"Next (input input) for non-transient states"); }//In machine non-automatic operation state: Shipment Status Change Status This method must be overridden        voidNext () {Throw NewRuntimeException ("Only call Next () for"+"stateduration.transient states"); }voidOutput () {print ("Over amount:"+ amount); }    }//vending machine static method    Static voidRun (generator<input> gen) { while(state = state.terminal) {Input inputtemp = Gen.next ();if(NULL= = Inputtemp/ * Restrict return to an operation in input * /) {return; } state.next (Inputtemp/ * Restrict return to an operation in input * /);//Returns the input Operation                                                          //corresponding            //If the previous operation is a standby status, that is, there will be an action = next operation (call next (para), transient            //set to True).              while(state.istransient)//state.istransient representative has next actionState.next ();        State.output (); }    } Public Static voidMain (string[] args) {//Get an InputGenerator<input> Gen =NewRandominputgenerator ();if(Args.length = =1)//Input operation command to complete command initializationGen =NewFileinputgenerator (args[0]);    Run (gen); }}//For a basic sanity check: class randominputgenerator implements Generator<Input > {     PublicInput Next () {returnInput.randomselection (); }}//Create Inputs from a file of '; ' -separated Strings: class fileinputgenerator implements Generator<Input> {    Privateiterator<string> input; PublicFileinputgenerator (String fileName) {input =NewTextfile (FileName,";"). iterator (); }//Restrict return to an operation in input     PublicInput Next () {if(!input.hasnext ())return NULL; String Inputnext = Input.next (). Trim ();if(Inputnext = =NULL||"". Equals (Inputnext)) {System.out.println ("The order is illegal.");returnInput.abort_transaction;        } Input inputgenerated = enum.valueof (Input.class, Inputnext); System.out.println (inputgenerated);returninputgenerated; }}

3. Other helper classes and related interfaces:

package com.java.array.generator;publicinterface Generator<T> {    T next();}

//: Net/mindview/util/textfile.javaPackage Net.mindview.util;import Java.io.*;import java.util.*; Public classTextfile extends Arraylist<string> {//Read a file as a single string:   Public StaticStringRead(String fileName) {StringBuilder SB =NewStringBuilder ();Try{BufferedReaderinch=NewBufferedReader (NewFileReader (NewFile (FileName). Getabsolutefile ());Try{String s; while(s =inch. ReadLine ())! =NULL) {sb.append (s); Sb.append ("\ n"); }      }finally{inch. Close (); }    }Catch(IOException e) {Throw NewRuntimeException (e); }returnSb.tostring (); }//Read a file, split by any regular expression:   Public textfile(String fileName, String splitter) {Super (Arrays.aslist (read (fileName) split (splitter)));//Regular expression split () often leaves an empty    //String at the first position:    if(Get(0). Equals ("") Remove (0); }//normally read by lines:   Public textfile(String fileName) { This(FileName,"\ n"); }  }

Enum implements the vending machine