package com.umbrella.km;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
public class MyContainer {
volatile List list = new ArrayList();
public void add(Object o) {
list.add(o);
}
public int size() {
return list.size();
}
@Test
public void test() {
MyContainer mc = new MyContainer();
new Thread(() -> {
for (int i = 0; i < 10; i++) {
System.out.println("add " + i);
mc.add(new Object());
try {
TimeUnit.SECONDS.sleep(1);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}, "t1").start();
new Thread(() -> {
while (true) {
if (mc.size() == 5) {
break;
}
}
System.out.println("t2 stop");
}, "t2").start();
}
public static void main(String[] args) {
MyContainer mc = new MyContainer();
new Thread(() -> {
for (int i = 0; i < 10; i++) {
System.out.println("add " + i);
mc.add(new Object());
try {
TimeUnit.SECONDS.sleep(1);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}, "t1").start();
new Thread(() -> {
while (true) {
if (mc.size() == 5) {
break;
}
}
System.out.println("t2 stop");
}, "t2").start();
}
}现在想要在t1线程的长度为5时，t2线程就终止。但只有main函数能正确执行，Junit的测试类就不行，为什么呢？
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