data structures abstraction and design using java

cardsLookpoker ("Wind Qing", Fengqingyang);Lookpoker ("Brigitte", Linqingxia);Lookpoker ("Elina", Liuyi);Lookpoker ("Hole cards", Dipai);}public static void Lookpoker (String name, arraylistSystem.out.print (name + "The card is:");for (String S:array) {System.out.print (S + "");}System.out.println ();}}Test multiple timesOutput:The wind is the card is: Xiao Wang 8 5 Q 4 7 8 9 A 4 7 2 6 7 8 9Brigitte's cards are: Q 5 9 A 6 3 Q 7 K K K 3 10 8 6 5Elina's cards are: 2 3 A J Q J 4 K 4 6 5 J 3 2 King

); Linkedlist.removefirst (); Linkedlist.removelast (); //determine if the linked list is emptySystem.out.println (Linkedlist.isempty ());} HashMap Non-synchronous Public Static voidhashmaptest () {HashMapNewHashmap(); //adding elements to the hash tableHashmap.put ("TP", 123); Hashmap.put ("ZP", 567); System.out.println (HASHMAP); //facilitates a hash table with iterators for(IteratorHashmap.entryset (). iterator (); Iterator.hasnext ();) {EntryIterator.next (); Syst

the left to find an element that is larger than the base element, stop, the two elements are exchanged until two pointers meet, the end of the cycle * pointer point to the The position is where the datum element should be located in the collection * eg * {8,-2, 3, 9, 0, 1, 7, 6} * Benchmark * First bm=8 * end = Lengt h-1 = 7 * start=0 * End--, We found 6:8 small, end pointer stopped, current index is j=7 * start++, until element 9 stops, current index i=3 * Exchange the elements corresp

This article summarizes some of the data structures implemented in JavaBriefly:ListQueuemapSetThe data structure involved:Stack: provides push and stack (POP) functionsqueues: non-blocking methods for offer and pull, blocking methods for put and takeList : provides various functions such as add, find, remove, traverse, etc.Tree: Red-black tree, usually used for r

(String)); }Second, the use of the stack-delimiter matching.public int charat (char c) {for (int i = 0; i will ({Press into the stack once, once encountered)}] will be compared with the popup element, if it matches, then match. If not)}], the left sign of the stack pops up and the hint is where the specific right symbol type is missing. This is a tool that can be implemented using stacks.Stack of data i

usually limited to a given size. So far, you've seen through the implementation of the queue that using the offer or Add method Enqueue queue (with remove or poll to dequeue queue) is assumed that if the queue does not provide add or remove operations, then you do not have to wait for the program to execute. The Java.util.concurrent.BlockingQueue interface implements blocking. It adds a put and take method. It may be more useful to cite an example.Us

() method in the Bubblesort.java program (listing 3.1) with the Oddevensort () method . Make sure it runs in a sort of different amount of data, and that you need to figure out the number of two scans. Parity Ordering is actually useful in multiprocessor environments where the processor can process each odd pair at the same time, and then handle even pairs at the same time. Because the odd pairs are independent of each other, each pair can be compar

Recently listening to colleagues said that the use of Sparsearray instead of HashMap can improve performance, so the edge of the two classes of data structure for a simple analysis.Data structure of HashMapHashMap is a combination of arrays and linked lists (in the data structure called "chain-Table hashing"), as shown in:Photo Source: Java's HashMap and HashtableData structure of SparsearraySparsearray ref

Method Public BooleanDeleteLongvalue) { intj =find (value); if(j==Nelems) { return false; } Else { for(intK=j; k) {A[k]= A[k+1]; } nelems--; return true; } } //Binary Method Search Public intFindLongSearchkey) { intlowerbound = 0; intUpperbound = nElems-1; intCurin; while(true) {Curin= (lowerbound + upperbound)/2; if(a[curin]==Searchkey) { returnCurin;//found it } Else if

)? {???????? This.ddata?=?ddata;???????? This.idata?=?idata,????}???? Public?void?displaylink ()? {???????? System.out.println ("{"? +?idata?+? ",?"?) +?ddata?+ "}");????}}Simple test Cases:Package?com.xingej.algorithm.datastructure.linkedlist.singlelinkedlist;import?org.junit.test;/**?*? single-linked list test? *[email protected]?erjun?2017 December 8? Morning 9:00:54?*/public?class? Linklisttest? {[email protected]???? Public?void?test ()? {???????? Linklist?list?=?new? Linklist ();???????? ?

=currentlink.next;} System.out.println (""); System.out.print ("Linklist.displaylist () Finish");}}public class Linklistapp {public static void main (string[] args) {linklist thelinklist =new linklist (); Thelinklist.insertlink (9, 999, 999.999); Thelinklist.displaylist (); Thelinklist.insertfirst (22, 22.22); Thelinklist.insertfirst (33.33), Thelinklist.insertfirst (44.44), Thelinklist.insertfirst (55, 55.55); Thelinklist.displaylist (); Thelinklist.insertlink (2, 333, 333.333); Thelinklist.di

));}} //Look at cardsLookpoker ("Wind Qing", Fengqingyang);Lookpoker ("Brigitte", Linqingxia);Lookpoker ("Elina", Liuyi); lookpoker ("hole cards", Dipai);}public static void Lookpoker (String name, arraylistSystem.out.print (name + "The card is:");for (String S:array) {System.out.print (S + "");}System.out.println ();}} Test multiple timesOutput: The wind of the card is: Xiao Wang ♦8♥10♦5♣q♥4♣7♣8♠9♦a♠4♥7♠2♦6♠7♥8♣9Brigitte's cards are: ♦q♥5♥9♠a♠6♣3♠q♦7♦10♠k♦k♣k♥3♠10♠8♥6♠5Elina's cards are: ♥2♠3♥

(Array.get (x)); } NBSP;NBSP;} Look at the cardsLookpoker ("Wind Qing", Fengqingyang);Lookpoker ("Brigitte", Linqingxia);Lookpoker ("Elina", Liuyi); lookpoker ("hole cards", Dipai);}public static void Lookpoker (String name, arraylistSystem.out.print (name + "The card is:");for (String S:array) {System.out.print (S + "");}System.out.println ();}} Test multiple timesOutput: The wind is the card is: Xiao Wang 8? 10? 5? Q. 4? 7? 8? 9? A 4? 7 2? 6? 7? 8? 9Brigitte's cards are:? Q. 5? 9? A? 6? 3?

Com.guodiantong.mvc.domain.Customer; Import Com.guodiantong.mvc.impl.CustomerDaoJdbcImpl; public class Customerservlet extends HttpServlet {Customerdao customerdao=new customerdaojdbcimpl (); @Override protected void doget (HttpServletRequest req, HttpServletResponse resp) throws Servletexception, IOException {DoPost (req, resp); } @Override protected void DoPost (HttpServletRequest req, HttpServletResponse resp) throws Servletexception, Ioexcep tion {String servletpath=req.getservletp

, each object of the system should focus on the discrete abstraction in the problem domain. So ideally, an object would only do one thing. This also brings a lot of benefits in development: it provides reusability and maintainability, and is a good foundation for refactoring.So almost all design patterns are based on this basic design principle. The origin of the

Java from junior programmer to architect video, document, architecture design, large Web site architecture analysis, big Data analysis data, build high concurrency, high-powered architecture design materials need to contact me. Many catalogs are not listed (there are many ca

1, the entity component is just one of the implementation choices in the EJB layer. Entity components should not be exposed to client software. The Web tier and other EJB client software should never directly access entity components. It should only deal with a session component layer consisting of a session component that implements the application of business logic. This not only keeps the flexibility in application design and implementation, but al

[Java 8] Using Lambda expressions for DesignUse Lambda expressions for Design In the previous articles, we have seen how Lambda expressions make code more compact and concise. This article mainly introduces how Lambda expressions change program design and how to make programs more lightweight and concise. How to make t

Object | design | data | Data synchronization using PUBLISH/SUBSCRIBE design pattern to achieve data synchronization between objects Applications often need to change and exchange data