k means clustering java source code

This article describes a Python-based batch conversion method that implements Java source code from ANSI to UTF-8. Share to everyone for your reference. Specific as follows: Like with eclipse of the great gods, may accidentally code becomes ANSI code, need to convert to Utf

() bye! Frog disposedisposing Description Eats bugsdisposing characteristic Croaksamphibian disposedisposing Description Both Water and landdisposing characteristic can live in Wateranimal disposedisposing Description Animal not vegetabledisposing Characteristic have heartlivingcreature disposedisposing Description Basic Living creaturedisposing characteristic is AliveSOURCE parsingEach class in the hierarchy containscharacteristicAndDescriptionThese two types of member objects, and they must a

Graphic Java IO: 2. Source Code of FilenameFilter, iofilenamefilter Writer: BYSocket) Weibo: BYSocket Bean flap: BYSocket FaceBook: BYSocket Twitter: BYSocket From the previous illustration of Java IO: 1. The File source code did

Writer:bysocket (mud and brick pulp carpenter)Micro-Blog: BysocketWatercress: BysocketFaceBook: BysocketTwitter: Bysocketfrom the previous article diagram Java IO: First, File source code did not finish all the file things. This time about FilenameFilter, the filter file Think in Java wrote: More specifically,

performance.The diagram below is the entire expansion process I've summed up: 3.ArrayList iterators ArrayList's iterator has two main itr and Listitr, but in jDK1.8 also added a arraylistspliterator, below learn ITR and LISTITR source code analysis. (1) Itr: can only traverse backwards Private class Itr implements iterator From the source, you can

, method three with the underscore a function name assembled together.Package com.seaboat.cpp;public class invokecpp{static{System.loadlibrary ("Test");}public native void Hello (String str);public static void Main (string[] args) {New Invokecpp (). Hello ("Hello");}}After the discussion of JNI back to the point, to see the JDK native method first to the OPENJDK source down, its directory structure as follows, Jdk/src basically contains most of the JD

Java-source code analysis Today, when I checked the source code of the listing list, I encountered a pitfall. When I studied the source code, I found that the shortlist is a linear link

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

Java multi-thread programming 7: deadlock (source code) Source code downloadIn multi-threaded programming, thread deadlock is also an interesting issue. However, the possibility of deadlock is very small. For this reason, we may not be very familiar with it. But deadlock is

congruential (Congruential method) is a very common method of generating random numbers, which is used in many programming languages, the most obvious is Java, and Java.util.Random class is one of the congruence method--linear with congruential (Linear Congruential method), in addition to the multiply with congruential (multiplicative congruential method) and mixed with congruential (Mixed congruential method). OK, now let's open the

Learn Java NIO design through the Http11NioProtocol source code of Tomcat Tomcat's Http11NioProtocol uses Java NIO technology to implement high-performance Web servers. This article analyzes the source code of Http11NioProtocol to

the perspective of APP app1, we regard integration with external app app3 based on the requirement-response mode as a "synchronous service" activity, the notification is regarded as an "Asynchronous receipt" activity. That is to say, in request-response and notification, our reference point application app1 becomes a service provider (service endpoint) and receives messages from the client. In this article, you will learn how to implement these two modes in such applications (assuming that they

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. ----

Java. util. concurrent package source code reading 11 ThreadPoolExecutor, threadpoolexecutor First, let's look at the execute method of ThreadPoolExecutor. This method can reflect what happened after a Task is added to the thread pool: Public void execute (Runnable command) {if (command = null) throw new NullPointerException ();/* if the number of running worker

Set the steps as follows: 1. Point "window"-> "Preferences"-> "Java"-> "Installed JREs" 2. At this point "installed JREs" Right is the list pane, listing the JRE environment in the system, select your JRE, and then click "Edit ..." on the edge, and a window (edit JRE) appears. 3. Select this entry for the Rt.jar file: "C:\Program Files\java\jre_1.5.0_06\lib\rt.jar" The "+" number on the left of the po

| key. equals (k ))){V oldValue = e. value;E. value = value;E. recordAccess (this );Return oldValue;}} ModCount ++;AddEntry (hash, key, value, I );Return null;}Get Method [Java]? Public V get (Object key ){If (key = null)Return getForNullKey ();Int hash = hash (key. hashCode ());For (Entry E! = Null;E = e. next ){Object k;If (e. hash = hash (k = e. key) = key | key. equals (k )))Return e. value;}Return null;} Public V get (Object key ){If (key = nul

default. HashMap expansion capacity is the current capacity doubling that is: capacity*2,hashtable expansion capacity is capacity doubling +1 that is: capacity*2+1 (about the expansion and filling factor will be said later) 4. The hash algorithm of the two is different, HashMap is first to the key (key) Hashcode code, and then the code worthy of high and low to Do (and) operations, the

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)

In Java programming or interview often encounter = =, equals () comparison. I looked at the source code, the actual programming summary.1. = == = In Java is the address that compares two objects in the JVM. Better understand. Look at the following code:1 Public classcomaddr

= mouseevent.button1)//left, Middle key for BUTTON2 re Turn inputevent.button1_mask; if (Button = = Mouseevent.button3)//Right key return inputevent.button3_mask; return-100; } The whole program is here to come to an end. The above program does not implement the encapsulation of the machine human thread. Complete the code can be used in the following site resources to download my resources: Http://xiazai.jb51.net/201608/yuanma/