AtomicStampedReference使用

//    ,       
public AtomicStampedReference(V initialRef, int initialStamp)
//    
public V getReference()
//     
public int getStamp()
//                            ,                 
public boolean compareAndSet(V   expectedReference,
                                 V   newReference,
                                 int expectedStamp,
                                 int newStamp)
//              ,            
public boolean attemptStamp(V expectedReference, int newStamp)
//              
public void set(V newReference, int newStamp) 

ここではdemoと書きます.

public static void main(String[] args) {

        String str1 = "aaa";
        String str2 = "bbb";
        AtomicStampedReference reference = new AtomicStampedReference(str1,1);
        reference.compareAndSet(str1,str2,reference.getStamp(),reference.getStamp()+1);
        System.out.println("reference.getReference() = " + reference.getReference());

        boolean b = reference.attemptStamp(str2, reference.getStamp() + 1);
        System.out.println("b: "+b);
        System.out.println("reference.getStamp() = "+reference.getStamp());

        boolean c = reference.weakCompareAndSet(str2,"ccc",4, reference.getStamp()+1);
        System.out.println("reference.getReference() = "+reference.getReference());
        System.out.println("c = " + c);
    }

  :
reference.getReference() = bbb
b: true
reference.getStamp() = 3
reference.getReference() = bbb
c = false
c     false ,