queue implementation in java

; Readerswitched.signalall (); } finally{switchingqueuelock.unlock (); } } PublicRecord Take () {Try{record Record=Queue.poll (); //If you get the switchover record, the switch queue retries if(Record = =Switch_queue_record) { if(!writerswitchsuccess) {notifywriterswitchsuccess (); } Record=Queue.poll (); } if(Record = =NULL) {taskcounter.incrbufferemptycount (); //call take

; } Else { returnfalse; } }Take the team head element　 Public void queuefront (int getfront) { if(isEmpty () = =false) { Getfront=queuelist[(front+1)%maxlen]; } Else { System.out.println ("Error:queue is Empty"); return ; } }Team Public void enQueue (int endata) { if(isfull ()

]; atFront = 0; -Rear =-1; -Items = 0; - } - - //Enter the team--first add to take in Public voidInsertLongkey) { - if(Rear = = MaxSize-1){ toRear =-1; + } -Arr[++rear] =key; theitems++; * } $ Panax Notoginseng //out of the squad--first in the plus 1 . - Public LongRemove () { the Longnum = arr[front++]; + if(Front = =maxSize) { AFront = 0; the } +items--; - returnnum; $ } $ - //Get Team head - P

; } /*** Out of the team *@return */ PublicObject Pull () {node node=First ; First=First.next; Node.next=NULL; Size--; returnNode.data; } /*** Queue Tail element *@return */ PublicObject GetLast () {if(IsEmpty ()) {return NULL; } returnLast.data; } PublicObject GetFirst () {if(IsEmpty ()) {return NULL; } returnFirst.data; } Public voidClear () { First=NULL; Last=NULL; Size=0; } /*** Traversal *@return

The queue is characterized by FIFO. Usually the queue is likened to the line to buy things, everyone is very orderly, first line people first buy things. but the priority queue is different, it does not follow the FIFO rule, but based on the priority of the elements in the queue, priority is first taken out. This is li

Data Structure-queue implementation (JAVA) For StackElement, see stack implementation. Package com. lip. datastruture. stack; public class Queue {Private StackElement Obj; // private int size for saving data; // number of elements public

Else{ + Break; - } the } *ARR[J+1] =key; $items++;Panax Notoginseng } - } the + Public LongRemove () { A returnarr[--items]; the } + - Public BooleanIsEmpty () { $ returnItems = = 0; $ } - - Public BooleanIsfull () { the returnItems = =maxSize; - }Wuyi the Public Longgetpeekmin () { - returnArr[items-1]; Wu } - About Publi

1 PackageTest;2 ImportJava.util.*;3 Public classQueue_test {4 5 Public Static voidMain (string[] args) {6 //TODO Auto-generated method stubs7 //input and character processing8Scanner scanner=NewScanner (system.in);9String string=scanner.nextline ();TenString [] String2=string.split (""); One A //Create a queue and insert a string inside the queue -QueueNewLinkedlist()

A queue is an important data structure.AlgorithmThere are very important applications in the design. In fact, the queue is also a kind of linked list. It only allows the table to start (dequeue), and the table to end (enqueue ), below is the JAVA Implementation of the queue.

) theLength[i] =Qarray.get (i). Size (); - for(inti = 0; i ) { -queueQarray.get (i); the while(length[i]--> 0) { theString str =Q.poll (); theQarray.get (Alphaindex (Str.charat (j-1)) . Offer (str); the } - } the } the for(inti = 0, aindex = 0; i //finally the while(Qarray.get (i). Size () > 0)94s[aindex++] =Qarray.get (i). Poll (); the } the the Private intAlphaindex (Charc) {98 returnAlpha

Principle:After a queue problem, the previous queue pops up and then inserts the array out of bounds. So this section is changed into a cyclic queue.The so-called circular queue is deleted to the end of the team to re-point to the team head, insert the data is full and then re-point to the team head, to achieve a loop.Run the result diagram:You can see that when

top-n problem * @author "ZHSHL" * @date2014 -10-22 * @param Test class:Package Com.algorithm.test;import com.algorithms.min_heap;/** * Minimum heap test class * @author "ZHSHL" * @date2014 -10-22 * */public clas s Min_heap_test {/** * @param args */public static void main (string[] args) {//TODO auto-generated method Stubmin_heap He Ap=new Min_heap, Heap.append (2); Heap.append (2); Heap.append (+); Heap.append (+); Heap.append (2); Heap.append (2) ; Heap.append (+); Heap.append (6); int Temp;w