sentiment analysis project source code in java

Iterator is often used to traverse the list as follows: listNew arraylist(); List.add ("Apple"); List.add ("banana"); List.add ("watermelon"); for (iteratorlist.iterator (); Iterator.hasnext ();) { System.out.println (Iterator.next ()); }In the Java collection, the list interface inherits the collection interface, theAbstractlist class implements the list interface, and the internal class ITR in Abstractlist imp

) {TreeSet set=NewTreeSet (); Set.add ("AAA"); Set.add ("AAA"); Set.add ("BBB"); Set.add ("Eee"); Set.add ("DDD"); Set.add ("CCC"); //Sequential Traversal TreeSetAsciteratorthroughiterator (set); //Reverse Traversal TreeSetDesciteratorthroughiterator (set); //traverse TreeSet through For-each. Not recommended! This method requires that the set be converted to an arrayForeachtreeset (set); } //Sequential Traversal TreeSet Public Static voidAsciteratorthroughiterator (TreeSet set) {System.o

map.isempty (); }　　iterator: Returns an iterator that iterates over the elements in this setPublic iterator　　boolean remove (Object o): If the specified element is present in this set, remove itpublic boolean remove (Object o) { return Map.Remove (o) ==present; }　　int size (): Returns the number of elements in this set public int size () { return map.size (); }Third, HashSet application example codepublic class hashsetdemo{public static void Main (string[] args)

Maybe we often pay attention to the characteristics of each Set in practical applications or interviews. For example, the Set cannot store duplicate elements, and cannot maintain the insertion and size order, map sets store key-value pairs and so on. However, if you want to learn Java well or have a higher goal and be proficient in Java, it is far from enough. In fact, we still need to know more about the c

through the adapter pattern, TreeMap, HashMap, The implementation classes such as Weakhashmap are implemented by inheriting Abstractmap, in addition, the hashtable of the map interface is implemented directly by the less commonly used, and vector is the collection class introduced by JDK1.0. Iterator is an iterator that iterates through the collection (cannot traverse the map, only to traverse the collection), and the collection implementation class implements the iterator () function, which r

[Java concurrent programming] 18. PriorityBlockingQueue source code analysis, PriorityBlockingQueue is an array-based thread-safe unbounded queue. Its principle and internal structure are basically the same as those of PriorityQueue, but there are multiple threads for security. 1: theoretically, it is unbounded, So add

buffer", which wakes the waiting thread on Notfull when the buffer data is read.(02) In the main function of ConditionTest2, 10 "Write Threads" are started, the data is written to Boundedbuffer continuously (0-9), and 10 "read Threads" are started, and the data is read continuously from Boundedbuffer.(03) Simple analysis of the results of the operation. 1, the P1 thread writes 1 to the buffer. at this point, the buffer data: | 1 | | |

Http://www.cnblogs.com/xrq730/p/4854813.htmlThreadlocal 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 foundationsIn the analysis of Threadlocal

();newcapacity = Integer.max_value;}Value = arrays.copyof (value, newcapacity); Copy the original data into an enlarged array to return}The reference source code, oneself in the engineering code simple realization function.byte[] bytes = new BYTE[16]; Stringbuff default initialization of source

RemoveRange (int fromIndex, int toindex) { modcount++; int nummoved = Size-toindex; System.arraycopy (Elementdata, Toindex, Elementdata, FromIndex, nummoved); Clear to let GC does its work int newSize = size-(toindex-fromindex); for (int i = newSize; i removes all elements in the list between FromIndex(inclusive) and Toindex(not included). Moves all subsequent elements to the left (decreasing their index). This call shortens the

) | | * ( First.prev==nullfirst.item!=null) */transientnode All operations around the addition and deletion of the node, see a add all the actions /***Constructsalist containingtheelementsofthespecified* Collection,intheordertheyarereturnedbythecollection ' s *iterator.** @param cthecollectionwhoseelementsaretobe placedintothislist* @throws nullpointerexception ifthespecifiedcollectionisnull*/ publiclinkedlist (collection 3. Vector ArrayList similar, the

The java. util package contains a series of important collection classes. This article will start with analyzing the source code, thoroughly studying the internal structure of a collection class, and traversing the source code implementation of the iteration mode of the set.

rejected.4. Callerrunspolicy Example 1 Import Java.lang.reflect.Field; 2 Import Java.util.concurrent.ArrayBlockingQueue; 3 Import Java.util.concurrent.ThreadPoolExecutor; 4 Import Java.util.concurrent.TimeUnit; 5 Import Java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy; 6 7 public class Callerrunspolicydemo {8 9 private static final int threads_size = 1;10 private static final in T capacity = 1;11 public static void Main (string[] args) throws Exception {13 14//Create thread pool. The ma

not allowed to contain the same elements. However, this feature limit is how to implement, we look at the source code can be at a glance.3. Source code ParsingThere is no other attribute in the A:linkedhashset class except for a serialization ID, except for a few constructors, there are no other methods, and the other

class. 　　The Submit method is used to submit the task and has the return result, declared in Executorservice and implemented in the Abstractexecutorservice class, and the Threadpoolexecutor class is not overridden. 　　The shutdown method closes the thread pool, but allows the running task to run out and place the state as shutdown. 　　the Shutdownnow method attempts to terminate the running task when the thread pool is closed, and the status is set to stop. 3 Threadpoolexecutor Class of impor

Maybe we often pay attention to the characteristics of each Set in practical applications or interviews. For example, the Set cannot store duplicate elements, and cannot maintain the insertion and size order, map sets store key-value pairs and so on. However, if you want to learn Java well or have a higher goal and be proficient in Java, it is far from enough. In fact, we still need to know more about the c

(hashmap m) { linkedhashmap) m; if (LM. Accessorder) { lm.modcount+ +; remove (); Addbefore (lm.header); } } In the LRU algorithm, the least used pages are swapped out and most recently used are likely to be used later.He determines the Accessorder attribute, if true, executes an algorithm called LRU , removes the newly accessed entry and adds it to the front of the header, so that the iteration The i

Java-based Set source code analysis The Set interface and implementation class are the simplest. The simple reason is that their implementation is based on the actual map implementation. For example, hashSet is based on hashMap, TreeSet is based on TreeMap, and CopyOnWriteArraySet is based on CopyOnWriteArrayList. Ther

SourceSource Address public static int binarySearch(int[] a, int key) { return binarySearch0(a, 0, a.length, key); } public static int binarySearch(int[] a, int fromIndex, int toIndex, int key) { rangeCheck(a.length, fromIndex, toIndex); return binarySearch0(a, fromIndex, toIndex, key); } // Like public version, but without range checks. private static int binarySearch0(int[] a, int fromIndex, int toIndex,

Run: For (iterator it = O. getsons (). iterator (); it. hasnext ();){ R = (knowledgenode) it. Next (); It. Remove (); // if it is changed to O. getsons (). Remove (r);, the concurrentmodificationexception will be thrown. } An exception occurred. It turned out to be an iterator synchronization problem. The Remove Method of the set used for calling. It is best to use the iterator method. For example, it is no problem to delete the current element using the remove () method of iterator itself. ----