jvm规范手册的说明:https://docs.oracle.com/javase/specs/jvms/se14/html/jvms-2.html#jvms-2.11.10 Method-level synchronization is performed implicitly, as part of method invocation and return (§2.11.8). A synchronized method is distinguished in the run-time constant pool's method_info struc...
public void run() { if("static_method".equals(Thread.currentThread().getName())){ synchronizedStaticMethod(); }else if("no_static_method".equals(Thread.currentThread().getName())){ synchronizedMethod(); }else if ("static_block".equals(Thread.currentThread().getName())){ synchronized(Synch...
The Java programming language provides two basic synchronization idioms:synchronized methodsandsynchronized statements. The more complex of the two, synchronized statements, are described in the next section. This section is about synchronized methods. To make a method synchronized, simply add thesynchroniz...
publicclassSynchronizedDemo{publicstaticvoidmain(String[]args){SynchronizedDemodemo=newSynchronizedDemo();demo.method1();}privatesynchronizedvoidmethod1(){System.out.println(Thread.currentThread().getId()+": method1()");method2();}privatesynchronizedvoidmethod2(){System.out.println(Thread.currentThread(...
从时间线可以看出method1和method2、method3和method4存在竞争关系。 当一个线程访问Synchronized类的一个synchronized (this)同步代码块时,其它线程对同一个Synchronized类中其它的synchronized ()同步方法的访问将是堵塞;访问synchronized (Synchronized.class)同步代码块时, static synchronized同步方法的访问将是阻塞,这说...
因此,我们称呼synchronized为对象锁,是因为它提供了对Java对象的同步访问控制,通过锁定对象来防止多个线程同时修改对象的状态,从而保证了程序的线程安全。 3、如何使用? 3.1、类的实例对象 //实例方法,锁住的是该类的实例对象 public synchronized void method(){ ...
The Java® Virtual Machine Specification针对同步方法的说明: Method-level synchronization is performed implicitly, as part of method invocation and return. A synchronized method is distinguished in the run-time constant pool’s method_info structure by the ACC_SYNCHRONIZED flag, which is checked by ...
Synchronized.java#14 = NameAndType #4:#5 // "<init>":()V#15 = Utf8 juc/Synchronized#16 = Utf8 java/lang/Object{public juc.Synchronized();descriptor: ()Vflags: ACC_PUBLICCode:stack=1, locals=1, args_size=10: aload_01: invokespecial #1 // Method java/lang/Object."<init>":()...
SynchronizedNavigableSet(INavigableSet) Method Reference Feedback Definition Namespace: Java.Util Assembly: Mono.Android.dll Returns a synchronized (thread-safe) navigable set backed by the specified navigable set. [Android.Runtime.Register("synchronizedNavigableSet", "(Ljava/util/NavigableSe...
Collections.SynchronizedCollection(ICollection) MethodReference Feedback DefinitionNamespace: Java.Util Assembly: Mono.Android.dll Returns a synchronized (thread-safe) collection backed by the specified collection. C# Sao chép [Android.Runtime.Register("synchronizedCollection", "(Ljava/util/Collection;)...