今天学习AtomicStampedReference类,该类是JUC原子包中的类,通过单元测试代码把所有public api方法跑了一遍,大致了解了底层实现
package test.java.util.concurrent.atomic;
import java.util.concurrent.atomic.AtomicStampedReference;
import org.junit.Test;
/**
* AtomicStampedReference的测试类
*
* @author zqw
* @date 2020-06-20 23:04:34
*/
public class AtomicStampedReferenceTest {
/**
* 构造函数,参数一为要标记的对象引用
* 参数二为标记布尔值
* toString 返回ObjectclassName@hashCode()
* void
* @throws
* @date 2020/6/20 21:40
*/
@Test
public void testConstruct0()throws Exception{
AtomicStampedReferenceTest test=new AtomicStampedReferenceTest();
AtomicStampedReference testObj=new AtomicStampedReference(test,123);
System.out.println(testObj.toString());
}
/**
* 获取引用对象
* @throws
* @date 2020/6/20 21:40
*/
@Test
public void testGetReference(){
AtomicStampedReferenceTest test=new AtomicStampedReferenceTest();
AtomicStampedReference testObj=new AtomicStampedReference(test,123);
System.out.println(testObj.getReference());
}
/**
* 获取引用对象标记值
* @throws
* @date 2020/6/20 21:40
*/
@Test
public void testGetStamp(){
AtomicStampedReferenceTest test=new AtomicStampedReferenceTest();
AtomicStampedReference testObj=new AtomicStampedReference(test,123);
System.out.println(testObj.getStamp());
}
/**
* 获取引用对象标记值
* @throws
* @date 2020/6/20 21:40
*/
@Test
public void testGet(){
AtomicStampedReferenceTest test=new AtomicStampedReferenceTest();
AtomicStampedReference testObj=new AtomicStampedReference(test,123);
int[] intArrs=new int[]{123333,321};
System.out.println(testObj.get(intArrs));
System.out.println();
}
/**
* CompareAndSet和WeakCompareAndSet相同
* 将引用对象根据期望的值判断,true则设置成新值和新标记值
* false则不设置
* @throws
* @date 2020/6/20 21:40
*/
@Test
public void testWeakCompareAndSet(){
AtomicStampedReferenceTest test=new AtomicStampedReferenceTest();
AtomicStampedReferenceTest test1=new AtomicStampedReferenceTest();
AtomicStampedReference testObj=new AtomicStampedReference(test,123);
System.out.println(testObj.weakCompareAndSet(test,test1,123,321));
System.out.println(testObj.getReference());
System.out.println(testObj.getStamp());
}
/**
* CompareAndSet和WeakCompareAndSet相同
* 将引用对象根据期望的值判断,true则设置成新值和新标记值
* false则不设置
* @throws
* @date 2020/6/20 21:40
*/
@Test
public void testCompareAndSet(){
AtomicStampedReferenceTest test=new AtomicStampedReferenceTest();
AtomicStampedReferenceTest test1=new AtomicStampedReferenceTest();
AtomicStampedReference testObj=new AtomicStampedReference(test,123);
System.out.println(testObj.compareAndSet(test,test1,123,321));
System.out.println(testObj.getReference());
System.out.println(testObj.getStamp());
}
/**
* 将引用对象设置成新值和新标记值
* @throws
* @date 2020/6/20 21:40
*/
@Test
public void testSet(){
AtomicStampedReferenceTest test=new AtomicStampedReferenceTest();
AtomicStampedReferenceTest test1=new AtomicStampedReferenceTest();
AtomicStampedReference testObj=new AtomicStampedReference(test,123);
testObj.set(test1,321);
System.out.println(testObj.getReference());
System.out.println(testObj.getStamp());
}
/**
*改变引用对象标记值
* @throws
* @date 2020/6/20 21:40
*/
@Test
public void testAttemptStamp(){
AtomicStampedReferenceTest test=new AtomicStampedReferenceTest();
AtomicStampedReference testObj=new AtomicStampedReference(test,123);
testObj.attemptStamp(test,321);
System.out.println(testObj.getStamp());
}
}