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February 12, 2014 12:43
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package com.javarush.test.level16.lesson05.task02
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package com.javarush.test.level16.lesson05.task02; | |
import java.util.ArrayList; | |
import java.util.List; | |
/* Horse Racing | |
Разберись, что делает программа. | |
Реализуй метод calculateHorsesFinished. Он должен: | |
1. Посчитать количество финишировавших лошадей и возвратить его. Используй метод isFinished(). | |
2. Если лошадь еще не пришла к финишу (!isFinished()), то: | |
2.1. Вывести в консоль "Waiting for " + horse.getName(). | |
2.2. Подождать, пока она завершит гонку. Подумай, какой метод нужно использовать для этого. | |
*/ | |
public class Solution { | |
public static int countHorses = 10; | |
public static void main(String[] args) throws InterruptedException { | |
List<Horse> horses = prepareHorsesAndStart(); | |
while (calculateHorsesFinished(horses) != countHorses) { | |
} | |
} | |
public static int calculateHorsesFinished(List<Horse> horses) throws InterruptedException { | |
int countFinished = 0; | |
//add your implementation here - добавь свою реалзацию тут | |
for (int i = 0; i < horses.size(); i++) | |
{ | |
if (horses.get(i).isFinished()) | |
{ | |
countFinished++; | |
} | |
else if (horses.get(i).isFinished() != true) | |
{ | |
System.out.println("Waiting for " + horses.get(i).getName()); | |
horses.get(i).join(); | |
} | |
} | |
return countFinished; | |
} | |
public static class Horse extends Thread { | |
public Horse(String name) { | |
super(name); | |
} | |
private boolean isFinished; | |
public boolean isFinished() { | |
return isFinished; | |
} | |
public void run() { | |
String s = ""; | |
for (int i = 0; i < 1001; i++) { //delay | |
s += new String("" + i); | |
if (i == 1000) { | |
s = " is finished!"; | |
System.out.println(getName() + s); | |
isFinished = true; | |
} | |
} | |
} | |
} | |
public static List<Horse> prepareHorsesAndStart() { | |
List<Horse> horses = new ArrayList<Horse>(countHorses); | |
String number; | |
for (int i = 1; i < countHorses + 1; i++) { | |
number = i < 10 ? ("0" + i) : "" + i; | |
horses.add(new Horse("Horse_" + number)); | |
} | |
for (int i = 0; i < countHorses; i++) { | |
horses.get(i).start(); | |
} | |
return horses; | |
} | |
} |
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