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:" +index);} NBSP;ELSENBSP;{SYSTEM.OUT.PRINTLN ("No target value found:" +tagvalue);}} /*** the method of finding binary method */publicstaticintbinaryseach (int[]arr,int Tagvalue) {//Look for the first subscript of the range intfirstindex=0;//look for the last subscript of the range intlastindex=arr.length -1;//If the first subscript is larger than the last subscript, there is no need to look again, ending the Loop while (FirstindexThis article from the "Genius Union Education Official Blog" bl

store the linked list privatenodelast=null;// is used to store the collection length Privateint size=0;//method of adding elements Publicvoidadd (objectobj) {//Create node object nodenode= newnode ();//node stores the added element node.element=obj;//determines whether the first node is nullif (first== NULL) {//The first node for the description is the first time that the element is added first=node;//sets the first and last nodes to their own first.pre=node; First.next=node;} Determines whethe

* @author Genius Alliance - Yukun */classthreadcextendsthread{privateobjectobj; PUBLICNBSP;THREADC (Objectlocalobject) {this.obj=localobject;} @Overridepublic voidrun () {/** Call the Notify method, you must obtain the lock that invokes the Notify method object in a synchronous manner * Otherwise, the illegalmonitorstateexception exception will occur * in this case, the obj call Notify (Obj.notify ()) is used here * So the synchronization should also be obj (synchronized (obj) ) */synchronized

class object to 8this.setpriority (8);}} Package thread.priority;/** * Create Child threads * @author Genius Federation-Yukun */public class Sonthread extends Fatherthread {public static void Main (string[] args) {//Create Sonthread object and invoke the Start method with the created object to start the thread new Sonthread (). Start (); @Overridepublic void Run () {/* * uses the keyword this to call the GetPriority method, gets the priority of the current thread * and System.out.println the pr

Let's get to it.Math class: Mathematical class, including ABS () absolute value, sin () sine function, cos () cosine function, etc.Random class: Gets the stochastic number of various data typesExample: Import java.util.random;/** * Demo get random number * @author Genius Federation-Yukun */public class Mathdemo {public static void main (string[] Arg s) {//Create the Random object random random = new random ();//Gets a double of type 0 to 1 for a double D = random.nextdouble (); System.out.printl

array array3 (only in ascending order) Arrays.sort (ARRAY3); System.out.println ("---------- sorted array ----------");//Iterate through the sorted array array3arraytostring (ARRAY3); SYSTEM.OUT.PRINTLN ("----- using dichotomy (binary) to find elements -----");//using dichotomy to find elements in an array, the lookup array must be sorted in ascending order int Index=arrays.binarysearch (array3,4); System.out.println ("4 in the array array3 subscript is:" +index);} /*** converts an array to a s

List.add (f); List.add (s);//To use a member specific to the object, the type conversion fatherf1= (Father) list.get (0) must be enforced; F1.work (); sons1= (Son) list.get (1); S1.play ();/******************* used a generic collection ************* /system.out.println ("-----------------------------");/** create generic collection objects, you can use ArrayList, You can also use linkedlist* Note: *1, generics can only use reference types, cannot use basic data types * such as:listGeneric SetPa

the linked list privatenodelast=null;// is used to store the collection length Privateint size=0;//method of adding elements Publicvoidadd (objectobj) {//Create node object nodenode= newnode ();//node stores the added element node.element=obj;//determines whether the first node is nullif (first== NULL) {//The first node for the description is the first time the element is added first=node;//sets the last node of the first node to its own first.next=node;} Determines whether the last node is Nul

); List.add (s);//You must force type conversion Father f1 = (Father) When you want to use members that are specific to the object List.get (0); F1.work (); son S1 = (son) list.get (1); S1.play ();/******************* uses the generic collection ********************/system.out.println ("-------- ---------------------"); */* Create generic collection objects, you can use ArrayList, or you can use LinkedList * Note: * 1, generics can only use reference types and cannot use basic data types * For e

private node fi RST = null;//is used to store the last node of the linked list private node end = null;//used to store the collection length private int size = 0;//method to add elements public void Add (Object obj) {/ /Create Node object nodes node = new node ();//node stores the added element node.element = obj;//Determines whether the first node is nullif (primary = = NULL) {//First node is the first time the element is added. = node;//Sets the first and last nodes of a node to their own fir

node fi RST = null;//is used to store the last node of the linked list private node end = null;//used to store the collection length private int size = 0;//method to add elements public void Add (Object obj) {/ /Create Node object nodes node = new node ();//node stores the added element node.element = obj;//Determines whether the first node is nullif (primary = = NULL) {//First node is the first time the element is added. = node;//Sets the latter node of the first node to its own first.next = n

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