标签：run int tom current highlight his rri err ted
Java中自增自减操作不具原子性，在多线程环境下是线程不安全的，可以使用使用AtomicInteger原子类代替i++，i--操作完成多线程线程安全操作。
下面是等于i++多线程的自增操作代码：
public class AtomicIntegerTest {
private static AtomicInteger count = new AtomicInteger(0);
public static void add() {
for (int i = 0; i < 10000; i++) {
System.out.println(count.incrementAndGet());
}
}
public static void main(String[] args) {
for (int i = 0; i < 8; i++) {
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
AtomicIntegerTest.add();
}
});
thread.start();
}
}
}
incrementAndGet()方法源码（JDK1.8）：
/**
* Atomically increments by one the current value.
*
* @return the updated value
*/
public final int incrementAndGet() {
return unsafe.getAndAddInt(this, valueOffset, 1) + 1;
}
标签：run int tom current highlight his rri err ted
原文地址：https://www.cnblogs.com/tangquanbin/p/10111449.html
