what is esb in java

class Thread2 implements Runnable {@Overridepublic void run () {synchronized (multithread.class) {Syste M.out.println ("Enter thread2 ..."); System.out.println ("Thread2 notify other thread can release wait status."); MultiThread.class.notify ();/* Because the Notify method does not release the lock, the THREAD2 calls the following sleep method to rest for 10 milliseconds. But Thread1 still won't run. Because the THREAD2 does not release the lock, Thread1 cannot get the lock.*/system.out.printl

Previously learned Thread-safe Classes:Stringbuffer: A variable sequence of characters for thread Safety. A String string buffer that is similar to, but cannot be modified.Vector: Vector classes can implement an array of objects that can grow.Hashtable: This class implements a hash table that maps the keys to the corresponding Values. Any non- null object can be used as a key or a Value.1 // Thread-safe Classes 2 New StringBuffer (); 3 New vector(); 4

The Equals and Hashcode methods in Java are in object objects, so each object has these two methods, and most of the time we need to override both methods in order to implement the specific requirementsThe Equals and Hashcode methods are commonly used in the same class for comparisons, especially when comparing elements in a set collection The Equals method returns true for two objects, hashcode must be the same Hashcode the same two objects,

]; Boolean oldalthashing = usealthashing; Usealthashing |= sun.misc.VM.isBooted () (newcapacity >= holder.alternative_hashing_threshold); Boolean rehash = oldalthashing ^ usealthashing; Transfer (newtable, rehash);//Transfer method table = newtable; threshold = (int) math.min (newcapacity * loadfactor, maximum_capacity + 1); }You can see that the maximum value of the threshold threshold is i

compilation type of the object is changed to the object type, but its run-time type is still its own type.2. As a result, it is necessary to//1 the collection element into the specific target type, and the "java.lang.ClassCastException" exception can easily occur.So is there any way that the collection can remember th

To say super is to say this first.2. Can be used inside a non-static member of a class to represent the current object. At this point, this is a final normal variable, which has a static type, which is the class C itself; it has a dynamic type, which is the type of the current object. You can call member functions on i

Recently, when I read the Jackson source, I found that there was a code return type written by Question: What are the differences between the declarations of the following 2 methods Public object DoSomething (Object obj) {...} public Answer:Single from the above 2 method declarations-no difference. Either t or obj, you can only invoke parameters and return values of type object.But based on the 2 methods above, if you have a class that uses generics:

class, unnecessarily increasing the compiler resolution cost, and accessing it directly with the class name. Ali as far as possible do not define variables in the interface, if you must define variables, it must be related to the interface method. Don't show magic numbers in the program. Summary : The constants in a Java project define a final class and have a private constructor method, the demo code is a

}); AExecutors.newsinglethreadexecutor (). Execute (Newrunable ( -{ Public voidrun () { - } the});There are two ways to implement it, usingNew Thread ()AndNew Thread (runnable)form, the first kind of direct callThreadOfRunmethod, so we tend to useThreadSubclass, which isNew Subthread ()。 The second kind of tuneUseRunnableOfRunMethod.There are two ways to implement this, namely, inheritanceThreadClasses and implementationsRunnableInterfaceUseSynchronizedKeyword Retouching synchronization met

public static void Printcoll (ArraylistIteratorwhile (It.hasnext ()){System.out.println (It.next (). toString ());}？ and T both represent the type of uncertainty, but if it is T, then the function can operate on t, such as while it can be written like thisT t = It.next ();System.out.println (t); T custom generics and? Wildcard generics 1. There is only one place in the entire class that uses generics, and

An object-serialized interface in which the object of a class is serializable only if it implements the serializable interface. So if you want to serialize objects of some classes, these classes must implement the Serializable interface. In fact, serializable is an empty interface with no specific content, and its purpose is simply to identify the object of a cla

What is the adaptation class for java-7.6 adaptation design patterns? Or the adaptation interface? In this chapter, let's discuss the adaptation issue? To put it bluntly, you can use any object to call a method, and this object only needs to comply with certain protocols. The implementation of this protocol has two methods: inheritance and interface, but interfac