是怎么做到确保的，为什么我觉得每次运行的时候utteranceCount 这个成员都在变化
package zh.codegym.task.task16.task1608;
/*
政治辩论中的学问
*/
public class Solution {
public static int totalSpeechCount = 200;
public static int utterancesPerSpeech = 1000000;
public static void main(String[] args) throws InterruptedException {
Politician chump = new Politician("笨蛋");
Politician dustbin = new Politician("垃圾箱");
Politician schooner = new Politician("大篷车");
chump.join();
while (chump.getSpeechCount() + dustbin.getSpeechCount() + schooner.getSpeechCount() < totalSpeechCount) {
}
System.out.println(chump);
System.out.println(dustbin);
System.out.println(schooner);
}
public static class Politician extends Thread {
private volatile int utteranceCount;
public Politician(String name) {
super(name);
start();
}
public void run() {
while (utteranceCount < totalSpeechCount * utterancesPerSpeech) {
utteranceCount++;
}
}
public int getSpeechCount() {
return utteranceCount / utterancesPerSpeech;
}
@Override
public String toString() {
return String.format("%s 说了 %d 次", getName(), getSpeechCount());
}
}
}