sentiment analysis project source code in java

The interface and implementation class of set is the simplest, and the simple reason is that its implementation is based on the actual map implementation. such as HashSet based on Hashmap,treeset based on Treemap,copyonwritearrayset based on Copyonwritearraylist.Therefore, it realizes the brief analysis. First look at the following class diagram:SetThe meaning of the set interface is that it contains equal elements, and equality is determined by the E

end, most parents have to be disappointed with the reality, with only a handful of so-called "winners" exceptions. They also sigh that children have been too bitter these years, not to enjoy the happiness and sunshine. Fourth place: Don't cherish your partner (57%) Drunk side know wine thick, love the party know heavy. Feelings, always have not know how to cherish, lost after the precious. Mankind can never invent two kinds of substances, one is indifferent water, and the second is regret medi

Java concurrency series [7] ---- CountDownLatch source code analysis, CountDownLatch is a useful tool class. With it, we can intercept one or more threads so that they can be executed after a certain condition is ripe. It provides a counter internally. When constructing a lock, you must specify the initial value of the

The CAS algorithm is mentioned several times in this paper, and a simple description of CAs (non-blocking algorithm) is first described. CAS has 3 operands, memory value V, old expected value A, new value B to modify. If and only if the expected value A and memory value v are the same, the memory value V is modified to B, otherwise nothing is done.Concurrentlinkedqueue is a thread-safe queue. He uses a non-blocking algorithm (CAS) to implement thread-safe. Concurrentlinkedqueue is a line-free se

() {//Create an empty stack} PublicEPush(EItem) {//into the stackAddElement (item);returnItem;}//out of the stackPublic synchronizedEPop() {EObj;intlen = size ();obj = Peek ();Removeelementat (Len-1);returnObj;}//returns the top element of the stack, but not the stackPublic synchronizedEPeek() {intlen = size ();if(len = =0)throw NewEmptystackexception ();returnElementAt (Len-1);}//determine if the stack is emptyPublic BooleanEmpty() {returnSize () = =0;}//finds the element and returns the stack

Threadlocal Source Code AnalysisThreadlocal is actually quite simple, because there are three public methods in the class: set (T value), get (), remove (). The first analysis of the source clearly know threadlocal is what to use, reuse, the final summary, explain threadlocal take such ideas. Three theoretical foundati

thread on Notempty. publicpoll() { finalthis.lock; lock.lock(); try { return0null : extract(); finally { lock.unlock(); } }The poll method returns null directly when the queue is detected as empty, otherwise the team head element is removed. PublicEPoll(LongTimeout, timeunit unit)throwsinterruptedexception {LongNanos = Unit.tonanos (timeout);FinalReentrantlock lock = This. Lock; Lock.lockinterruptibly ();Try{ while(Count = =0)

--cand C ++ programming resources. 9. http://www.codecogs.com/--codecogsis a collaborative open-source code library with a combination of numbers in c/c. Http://www.google.com/codesearch? Q = programming ++ lang: c cs_r = lang: c -- C source code of Google Code. 11. http://

(collection;//Remove objects that are not included in the collection default voidReplaceAll(unaryoperatorE> operator) {objects.requirenonnull (operator);FinallistiteratorE> li = This. Listiterator (); while(Li.hasnext ()) {Li.set (Operator.apply (Li.next ())); } }@SuppressWarnings({"Unchecked", "Rawtypes"})default voidSort(COMPARATORSuperE> C) {object[] a = This. ToArray (); Arrays.sort (A, (Comparator) c); listiteratorE> i = This. Listiterator (); for(Object e:a) {i.n

consistency problem that it faces. Hopefully in the end, there is a deep understanding of "weak consistency," which makes it much easier to understand why "weak consistency" has created a lot of complexity in coding. weak consistency of Concurrenthashmap weak consistency of case1:clear function Clear execution is complete, and there are still elements in the map.Reason: Because each segment is locked separately and the next segment is clear, the last segment lock is released, at which point the

returns the computed Hashcode value:1 public class comhashcode{2 public static void Main (string[] args) throws Exception {3 Comhashcode a = new Comh Ashcode (); 4 Comhashcode B = new Comhashcode (); 5 System.out.println (A.hashcode ()); 870919696 6 System.out.println (B.hashcode ()); 298792720 7 8 Long num1 = new Long (8), 9 long num2 = new Long (8), System.out.println (Num1.hashcode ( )); 811 System.out.prin

Java =, equals (), hashCode () Source Code AnalysisComparison of = and equals () is often encountered in java programming or interviews. I looked at the source code and summarized it with the actual programming. 1. = in

Source code analysis of java Collection classes: Map (2), javamap This section mainly discusses the differences and usage of Several implementation classes of the Map interface.1. Thread Security Hashtable is thread-safe (similar to Stringbuffer and Vector), but not others. As for why, read some previous articles, whic

array whose value is located by the hash of the key, and then the Equals method to determine whether the value exists.Five otherHash method Finalinthash (objectk) {inth=hashSeed; if (0!=hkinstanceofstring) { returnsun.misc.hashing.stringhash32 ((String) k); }h^=k.hashcode ();// thisfunctionensuresthathashcodesthatdifferonlyby //constantmultiplesateachbitpositionhavea bounded//numberofcollisions (approximately8at Defaultloadfactor) .h^= (h>>>20) ^ (h>>>12);returnh^ (h>>> 7) ^ (hGT;GT;GT;NBSP;4)

) { for(intindex = 0; index ) if(Elementdata[index] = =NULL) {fastremove (index); return true; } } Else { for(intindex = 0; index ) if(O.equals (Elementdata[index])) {fastremove (index); return true; } } return false; }　Set/get method//Assigning a value to a specified position element PublicE Set (intindex, E Element) {Rangecheck (index);//Check Array statusE OldValue = elementdata (index);//check to show array subscript

, then minus 1, Then to occupy the public resources. If the semaphore has a value of 0, the thread blocks itself until another thread releases the public resource.On the semaphore we define two operations: Acquire (Fetch) and release (release). When a thread invokes the acquire operation, it either succeeds in acquiring the semaphore (the semaphore minus 1), or waits until the wired path releases the semaphore or times out. Release (released) actually adds 1 to the semaphore and then wakes up th

And then the front object-oriented ~ today is about the string class: In fact, the string class also contains a lot of object-oriented knowledge ~First of all, ask a question: we in the development process, if you want to use a class, it is necessary to create objects, this sentence is no problem ~ ~ in the actual development of the time is really this, only to create an object to really use a common class, we generally create objects, Almost all class creation objects are created with the New k

　1. Introduction through an essay above we know that the bottom of hashset is implemented by map, so what is map? How is the bottom layer implemented? Here we analyze the source code, to see the specific structure and implementation. The Map collection class is used to store element pairs (called "Keys" and "values"), where each key is mapped to a value. Map.entry is its inner class, which describes the key

I. Implementation within the ArrayList ArrayList internal is achieved through the object[]. Two. SOURCE Analysis: (1). Construction method Public ArrayList () { array = emptyarray.object; } public ArrayList (int capacity) { if (capacity ArrayList has 3 constructs method, first look first, array is a member variable, it is object[] type, when we are in new an empty parameter A

First, HashSet Overview:HashSet implements the set interface, which is supported by a hash table (actually a hashmap instance). It does not guarantee the set's iteration order, especially it does not guarantee that the order is constant. This class allows the use of NULL elements.Second, the realization of HashSet:For HashSet, it is based on the implementation of HashMap, hashset the underlying use HashMap to save all elements, so hashset implementation is relatively simple, related hashset oper