private static final AtomicInteger i = new AtomicInteger(1); javaintegeratomic 20th Jun 2018, 10:49 AM Star Lord 1 Answer Answer + 1 It allows you to use Atomic operations. If you have multi threading application than simple increment like i++ may end with wrong result. That's why it'...
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shift= 31 -Integer.numberOfLeadingZeros(scale); }//.../*** Sets the element at position {@codei} to the given value. * *@parami the index *@paramnewValue the new value*/publicfinalvoidset(inti,intnewValue) { unsafe.putIntVolatile(array, checkedByteOffset(i), newValue); } } 从上...
这样就保证了一致性,而我们看到变量的值value使用voliate修饰的,保证了数据的内存可见性(一个线程修改其他线程可见)。所以多个线程并发的时候这个类代替Integer能够保证安全。 这个操作非常像数据库的乐观锁,给每个表添加一个version版本号,修改数据后要持久化先查询看版本号一致不,一致的话则持久化,不一致则重新获取值...
Added in 9. Java documentation forjava.util.concurrent.atomic.AtomicInteger.weakCompareAndSetAcquire(int, int). Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative Commons 2.5 Attribution ...
Java documentation for java.util.concurrent.atomic.AtomicInteger.compareAndSet(int, int). Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License. Applies to Produ...
Java documentation for java.util.concurrent.atomic.AtomicIntegerArray.getAndAdd(int, int). Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License. Applies to...
Atomic classes are not general purpose replacements forjava.lang.Integerand related classes. They donotdefine methods such asequals,hashCodeandcompareTo. (Because atomic variables are expected to be mutated, they are poor choices for hash table keys.) Additionally, classes are provided only for thos...
The atomic compareAndSet method also has these memory consistency features, as do the simple atomic arithmetic methods that apply to integer atomic variables. To see how this package might be used, let's return to the Counter class we originally used to demonstrate thread interference: class ...
所属专辑:Java Tutorials 音频列表 1 Float/Integer in details 12 2019-01 2 j.u.c.atomic.DoubleAccumulator/DoubleAdder in details 20 2019-01 3 java.lang.Double in details — English 7 2019-01 4 java.lang.Byte in details — English