container.png
同步容器不一定是线程安全的
比如
package io.haitaoc.concurrency.example.syncContainer;
import io.haitaoc.concurrency.annotation.NotThreadSafe;
import java.util.Vector;
@NotThreadSafe
public class VectorExample2 {
private static Vector<Integer> vector = new Vector<>();
public static void main(String[] args) {
while (true) {
for (int i = 0; i < 10; i++) {
vector.add(i);
}
Thread thread1 = new Thread() {
public void run() {
for (int i = 0; i < vector.size(); i++) {
vector.remove(i);
}
}
};
Thread thread2 = new Thread() {
public void run() {
for (int i = 0; i < vector.size(); i++) {
vector.get(i);
}
}
};
thread1.start();
thread2.start();
}
}
}
remove和get操作顺序不同导致错误，需要在调用端进行额外线程同步处理才能使其安全
