我正在尝试创建一个程序，该程序将一直运行直到用户停止它。它集中在圣诞老人的工作室，我有圣诞老人，九个驯鹿和十一个精灵。十一个精灵必须制造100个玩具（有5％失败的机会，圣诞老人帮助），九个驯鹿必须从假期返回。当两件事都发生时，圣诞老人送出玩具。在此之后，九只驯鹿去度假，精灵们必须再创造100多只玩具。这是我的代码：
main.java
public class Main {
private static Santa santa;
public Semaphore elfSemaphore = new Semaphore(1);
public Semaphore reindeerSemaphore = new Semaphore(1);
public volatile int toyList = 100;
public volatile int reindeersOnHoliday = 9;
public static void main(String[] args){
Main main = new Main();
santa = new Santa(main);
Reindeer dasher = new Reindeer("Dasher", main);
Reindeer dancer = new Reindeer("Dancer", main);
Reindeer prancer = new Reindeer("Prancer", main);
Reindeer vixen = new Reindeer("Vixen", main);
Reindeer comet = new Reindeer("Comet", main);
Reindeer cupid = new Reindeer("Cupid", main);
Reindeer dunder = new Reindeer("Dunder", main);
Reindeer blitzen = new Reindeer("Blitzen", main);
Reindeer rudolph = new Reindeer("Rudolph", main);
Elf elfOne = new Elf("Jim", main);
Elf elfTwo = new Elf("John", main);
Elf elfThree = new Elf("Eamonn", main);
Elf elfFour = new Elf("Eoin", main);
Elf elfFive = new Elf("Ronan", main);
Elf elfSix = new Elf("Seamus", main);
Elf elfSeven = new Elf("Rebecca", main);
Elf elfEight = new Elf("Orla", main);
Elf elfNine = new Elf("Tina", main);
Elf elfTen = new Elf("Filly", main);
Elf elfEleven = new Elf("Jess", main);
santa.start();
dasher.start();
dancer.start();
prancer.start();
vixen.start();
comet.start();
cupid.start();
dunder.start();
blitzen.start();
rudolph.start();
elfOne.start();
elfTwo.start();
elfThree.start();
elfFour.start();
elfFive.start();
elfSix.start();
elfSeven.start();
elfEight.start();
elfNine.start();
elfTen.start();
elfEleven.start();
}
public void wakeSanta(String reason) throws InterruptedException {
santa.setReasonForWake(reason);
}
}
elf.java
public class Elf extends Thread{
Random rng = new Random();
String name;
Main main;
public Elf(String name, Main main){
this.name = name;
this.main = main;
}
public void run(){
while(true){
try {
makeToy();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
private void makeToy() throws InterruptedException{
main.elfSemaphore.acquire();
if (main.getToyList() != 0){
if(rng.nextInt(99) <= 4){
System.out.println(name + " failed in making a toy! They went to Santa for help.");
main.wakeSanta("problem");
}else{
main.setToyList(main.getToyList() - 1);
System.out.println(name + " created a toy! Toys remaining: " + main.getToyList());
}
} else {
main.wakeSanta("toys");
}
main.elfSemaphore.release();
}
}
reindeer.java
public class Reindeer extends Thread {
String name;
boolean onHoliday;
Main main;
public Reindeer(String name, Main main){
this.name = name;
this.onHoliday = true;
this.main = main;
}
public void run(){
while(true){
if(onHoliday){
try {
returnFromHoliday();
if(name.equals("Rudolph") && main.getReindeersOnHoliday() == 0){
main.wakeSanta("reindeers");
}
} catch (InterruptedException e) {
e.printStackTrace();
}
} else {
if (main.getReindeersOnHoliday() == 9){
onHoliday = true;
}
}
}
}
private void returnFromHoliday() throws InterruptedException {
onHoliday = false;
System.out.println(name + " says: I'm back from holiday!");
main.reindeerSemaphore.acquire();
main.setReindeersOnHoliday(main.getReindeersOnHoliday() - 1);
main.reindeerSemaphore.release();
}
}
santa.java
public class Santa extends Thread {
Main main;
private boolean isSleeping = true;
private String reasonForWake = "";
public Santa(Main main){
this.main = main;
}
public void run(){
while(true){
if(!isSleeping){
if(reasonForWake.equals("reindeer")){
if(main.getToyList() == 0){
System.out.println("*****************************\nTime for Santa to deliver presents!\n*****************************");
deliverPresents();
} else{
isSleeping = true;
}
} else if (reasonForWake.equals("problem")){
try {
main.elfSemaphore.acquire();
main.setToyList(main.getToyList() - 1);
System.out.println("Santa has helped an elf fix a problem. Toys left: " + main.getToyList());
isSleeping = true;
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
main.elfSemaphore.release();
}
} else { //toys
if(main.getReindeersOnHoliday() == 0){
System.out.println("*****************************\nTime for Santa to deliver presents!\n*****************************");
deliverPresents();
}
else {
isSleeping = true;
}
}
}
}
}
public void setReasonForWake(String reasonForWake) {
isSleeping = false;
this.reasonForWake = reasonForWake;
}
private void deliverPresents(){
isSleeping = true;
main.setReindeersOnHoliday(9);
main.setToyList(100);
}
}
它可以使用一年，但它似乎卡在run()的{{1}}中，并且从未实际传递玩具，这意味着它永远不会循环。我觉得main，elf和reindeer中的代码非常坚固，但我不确定圣诞老人。任何人都可以提供有关如何使其可靠循环的见解吗？