AtomicInteger

AtomicInteger

java.util.concurrent.atomic

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Java 5.0

serializable

This threadsafe class holds an int value. It extends java.lang.Number , but unlike the Integer class, it is mutable. Access the int value with the get( ) method and the various methods inherited from Number . You can set the value with the set( ) method or through various atomic methods. In addition to the basic compareAndSet( ) and weakCompareAndSet( ) methods, this class defines methods for atomic pre-increment , post-increment, pre-decrement and post-decrement operations as well as generalized addAndGet( ) and getAndAdd( ) methods. addAndGet( ) atomically adds the specified amount to the stored value and returns the new value. getAndAdd( ) atomically returns the current value and then adds the specified amount to it.

Figure 16-98. java.util.concurrent.atomic.AtomicInteger

 public class  AtomicInteger  extends Number implements Serializable {  // Public Constructors  public  AtomicInteger  ( );        public  AtomicInteger  (int  initialValue  );  // Public Instance Methods  public final int  addAndGet  (int  delta  );        public final boolean  compareAndSet  (int  expect  , int  update  );        public final int  decrementAndGet  ( );        public final int  get  ( );        public final int  getAndAdd  (int  delta  );        public final int  getAndDecrement  ( );  default:0  public final int  getAndIncrement  ( );  default:-1  public final int  getAndSet  (int  newValue  );        public final int  incrementAndGet  ( );        public final void  set  (int  newValue  );        public final boolean  weakCompareAndSet  (int  expect  , int  update  );  // Public Methods Overriding Number  public double  doubleValue  ( );        public float  floatValue  ( );        public int  intValue  ( );        public long  longValue  ( );  // Public Methods Overriding Object  public String  toString  ( );   }