sentiment analysis project source code in java

); } }CopyonwritearraylistCopyonwritearraylist is a tool class in Java and contracted, and is introduced in jdk1.5, and its content is sufficient to write an article, so it is no longer open. Just a brief description of it.Its basic idea can be seen from the name, when the writing operation. A copy is copied and the write is made to the copy.The read and traverse operations occur on the replica that exists at the moment the operation occurs.

contiguous in heap memory, so the LinkedList class features: Access to elements is not efficient, but the insertion and deletion of elements is efficient, because the node change point can be achieved. 　　The implementation class of map I just say a hashmap,treemap is not said, is added in the time, there is a certain order, but it is not important, you can use the tool class collections class method to implement the ordering of the collection elements.the bottom of the HashMap is achieved by th

of initialcapacity and a load factor of 0.75.HashMap (int initialcapacity, float loadfactor): Creates a HashMap with the specified initial capacity, specified load factor.The HashMap base constructor hashmap (int initialcapacity, float loadfactor) has two parameters, which are the initial capacity initialcapacity and the load factor loadfactor.The maximum capacity of the initialcapacity:hashmap, which is the length of the underlying array.Loadfactor: Load factor loadfactor is defined as: the nu

real specific subclass, it is embodied in the way of the inner class.3. The source of the iterator:1 Public InterfaceIterator {2 BooleanHasnext ();3 Object Next ();4 }5 6 Public Interfaceiterable {7 Iterator Iterator ();8 }9 Ten Public InterfaceCollectionextendsiterable { One Iterator Iterator (); A } - - Public InterfaceListextendsCollection { the Iterator Iterator (); - } - - Public classArrayListImplementsList { + PublicIterator It

Source code analysis: Memory Allocation of Java objects (1) Java objects are allocated in two ways: Fast allocation and slow allocation. The lock-free pointer collision technology is used to distribute the objects in the new generation Eden zone, the slow distribution has d

the Noclassdeffounderror is reported.another way to specify a classpath:The class bytecode file is made into a jar package and placed in the lib/ext/directory of the JRE so that it can be found directly at execution time without the need to specify CLASSPATH.Class Loaders and ClasspathFrom the previous article we learned that the ClassLoader uses three by default:1,bootstrap ClassLoader, starting the ClassLoader, is responsible for loading the core class (that is, the class at the beginning of

understanding of string and the source code analysisHere I answer a xiaoguanzi, why just said string and char are closely related. Because the Java string is a sequence of char values (which is actually the final char array). This is well documented in the source code:/***/

Java thread pool Learning (5) -- ThreadPoolExecutor source code analysis Through the previous chapter, we learned how to create a thread pool through ThreadPoolExecutor. Next we will analyze the source code of ThreadPoolExecutor t

stopallcomponents () stop order. I believe everyone is very easy to understand. is to start the component through Supervisor.supervise. It is also important to note that a certain amount of time is required after the channel component is started in order for all channel to be started.Besides, why stop and start first? Due to the fact that you want to load the configuration file dynamically. Once you have loaded the configuration file, you need to start all the components again. So stop all of i

, TreeMap, HashMap, Weakhashmap and other implementation classes are implemented by inheriting Abstractmap, in addition, the less commonly used Hashtable directly implement the map interface, which and vector are JDK1.0 introduced in the collection class.Iterator is an iterator that iterates through a collection (it cannot traverse the map, only to traverse collection), and collection implements the iterator () function, which returns a iterator object that iterates through the collection. Listi

, TreeMap, HashMap, Weakhashmap and other implementation classes are implemented by inheriting Abstractmap, in addition, the less commonly used Hashtable directly implement the map interface, which and vector are JDK1.0 introduced in the collection class.Iterator is an iterator that iterates through a collection (it cannot traverse the map, only to traverse collection), and collection implements the iterator () function, which returns a iterator object that iterates through the collection. Listi

Java Collection of dry goods-inventory list source code analysis, dry goods inventory listPreface In the previous article, we analyzed ArrayList in detail. Today we will talk about 'arraylist. What is the difference between them? The biggest difference is that the underlying data structure is implemented differently. A

(command)) {//Here is a task in the queue, and if unsuccessful, the worker is added (encapsulates the thread object)int recheck = Ctl.get ();if (! isrunning (Recheck) Remove (command))Reject (command);else if (workercountof (recheck) = = 0)Addworker (null, FALSE);}else if (!addworker (command, FALSE))Reject (command);}The above link mentions: Offer () returns immediately after placing an element in the queue, and if it happens that the element was taken away by another thread, the Offer method

parent class, */void addentry (int hash,k key, V value, int Bucketindex) { Createentry (hash, key, value, bucketindex); Remove eldest entry if instructed, else grow capacity if appropriate entry* */private void Addbefore (entryThe traversal iteration uses a doubly linked list to iterate through the interface directly, not here. Be able to see the source code very easy to Understand.

see a 11. * Consistent snapshot:if modcounts change during a traversal 12. * of segments computing size or checking containsvalue, then 13. * We might have a inconsistent view of state so (usually) 14. * Must retry. A.*/16.transient intModcount; 17. 18./*** The table is rehashed when its size exceeds this threshold. * (The value of this field was always */23.transient intthreshold; 24. 25./*** the Per-segment table. .*/28.transient volatileHashentry[] table;

() {returnRemovefirst (); } PublicE Removefirst () {FinalNodeFirst ; if(f = =NULL) Throw Newnosuchelementexception (); returnUnlinkfirst (f); } PrivateE Unlinkfirst (nodef) {//assert F = = First f! = null; FinalE element =F.item; FinalNodeF.next; F.item=NULL; F.next=NULL;//Help GCFirst =Next; if(Next = =NULL) Last=NULL; ElseNext.prev=NULL; Size--; Modcount++; returnelement; }The first element is deleted, the head node is also explained before;4. Other (summary)ArrayLis

native voidNotifyall();Public final native voidwait(LongTimeoutthrowsInterruptedexception;Public final voidwait(LongTimeout, intNanosthrowsinterruptedexception {if(Timeout 0) {throw NewIllegalArgumentException ("Timeout value is negative"); }if(Nanos 0|| Nanos >999999) {throw NewIllegalArgumentException ("nanosecond timeout value out of range"); }off(Nanos >=500000|| (Nanos! =0 Timeout = =0)) {timeout++; } Wait (timeout); }Public final voidwait()throwsinterruptedexceptio

(): Terminates the Timer(8) Boolean java.util.TimerTask.cancel (): Terminates the TimerTaskamong these schedulexxx methods, except (1) (2), the other is able to invoke the task repeatedly, the basic difference is the difference between schedule and scheduleatfixedrate. The schedule () method is more focused on maintaining the stability of the interval time: guaranteed to be called once every period time.The Scheduleatfixedrate () method is more focused on keeping the operating frequency stable

Java Split method source code Analysis1 PublicString[] Split (charsequence input [,intlimit]) {2 intindex = 0;//Pointers3 Booleanmatchlimited = limit > 0;//whether to limit the number of matches4ArraylistNewArraylist//Match result Queue5Matcher m = Matcher (input);//The character to be cut (string) matches the object, where is the pattern? 6 7 //ADD

Java BlockingQueue source code analysis, javablockingqueueIntroduction BlockingQueue is a multi-thread security blocking queue provided by Java concurrent. Its sub-classes include javasblockingqueue and ArrayBlockingQueue.Key APIs When it comes to queues, the insertion and d