1, two-part search method to explain: if the use of binary search method to do the operation, the array must be ordered. So when you start out with an unordered array, you sort the ordered array first.public class test2{public static void Main (string[] args) {--Find the location of a dataint number = 8;--Define the number of groupsint[] arr = new int[]{7,2,10,9,45,3,4};Sorting and dichotomy are used simultaneously.int[] arr = new int[]{2,3,4,7,9,10,45};--Start subscriptint start = 0;--Terminati
Import Java.util.Arrays;public class arraysdemo{public static void Main (string[] args) {int [] arraysrc1={1,3,4,5,6,2};Copy data, no value default 0;int [] arraydes1=arrays.copyof (arraysrc1,10);for (int i=0;iSystem.out.print (arraydes1[i]+ "");}Copies the specified range of data within the specified array, subscript 2-subscript 4,4-2=2 number;int [] Arraydes2=arrays.copyofrange (arraysrc1,2,4);for (int i=0;iSystem.out.print (arraydes2[i]+ "");}The comparison of the array. Compares the specifie
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
1. FileInputStream reading data One byte array at a time byte[]Use FileInputStream to read one byte array at a time:int read (byte[] b) return value : The return value is actually the number of bytes actually read.2. code example:1 PackageCom.himi.fileinputstream;2 3 ImportJava.io.FileInputStream;4 Importjava.io.IOException;5 6 7 8 /**9 * Ten * Use FileInputStream one byte array at a time: int read (byte[] b) One * Return value: The return value is actually the number of bytes actually read A
The page often needs to establish a matching, corresponding relationship to change the page display elements; You might want to use a custom attribute to add an index value.DOCTYPE HTML>HTML>Head>Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8">title>Custom Attributes Match index valuestitle>Head>Body>inputtype= "button"value= "BTN1" />inputtype= "button"value= "BTN2" />inputtype= "button"value= "Btn3" />P>AP>P>BP>P>CP>Scripttype= "Text/javascript"> varabtn=document.getElemen
attributes:L ReadyStateThe status code of the Ajax object, the status code will change at any time0: Indicates that the object is established but not initialized1: Indicates that the object has been initialized but not sent2: The Send method has been called for request3: Receiving data (Received part)4: Receive completeL onReadyStateChangeWhen the status code of an Ajax object changes, the callback function that is triggeredL StatusHTTP response Status CodeL StatusTextText of the HTTP responseL
a value computed from the hash algorithm, which is related to the address value, but not the actual address value. Ten * You can understand the value of the address. One * A * Public final Class GetClass (): Returns the run-time class for this Object - * Method of class: - * public String GetName (): Returns the entity represented by this Class object as a string the */ - Public classStudenttest { - Public Static voidMain (string[] args) { -Student S1 =NewStudent (); +System.out.print
AArrayList array =NewArrayList (); at - //add multiple string elements (containing the same content) -Array.add ("Hello"); -Array.add ("World"); -Array.add ("Java"); -Array.add ("World"); inArray.add ("Java"); -Array.add ("World"); toArray.add ("World"); +Array.add ("World"); -Array.add ("World"); theArray.add ("Java"); *Array.add ("World"); $ Panax Notoginseng //Create a new collection -ArrayList NewArray =NewArrayList (); the + //iterate through the old collection, g
required to be placed in the POST request.
2. Related attributes:
L ReadyState
The status code of the Ajax object, the status code will change at any time
0: Indicates that the object is established but not initialized
1: Indicates that the object has been initialized but not sent
2: The Send method has been called for request
3: Receiving data (Received part)
4: Receive complete
L onReadyStateChange
When the status code of an Ajax object changes, the callback function that is triggered
L Statu
example, if you want to migrate a Forum module, all its migration files are placed in the migration folder of the module, you can use the following command:
yiic migrate up --migrationPath=ext.forum.migrations
Note that when you set a boolean option such as interactive, use the following method to pass 1 or 0 to the command line:
yiic migrate --interactive=0
Configure global commands
The command line option allows us to quickly configure the migration command, but sometimes we may want to confi
$ ("#div"). Toggle ( function() { $ ("#div"). CSS ({"width": "100px" }) , function () { $ ("#div"). CSS ({"width": "200px" }); }, function() { $ ("#div"). CSS ({"width": "300px" }); Jquery Event ObjectThe Jquery event merges different browser differences, such as event.target can be used in all browsers to get the trigger without judging the browser's use of srcelement.$ ("#div"). Click (function(e) { // return event name click // return event source
PHP//1. Open a file /*The first parameter: Open the file, the second parameter indicates the mode, W write only if the open file already has, then delete this file, re-create if not, directly create fopen return is the resource type resource, we generally call He's a handle, or a resource handle.*/ $fp=fopen("Test.txt",W); //2. Writing Data $outString= "This is gaoxiong!"; fwrite($fp,$outString); //suitable for only a word, do not need to do flexible things when file_put_contents($fp
Android:selectedweekbackgroundcolor
Setselectedweekbackgroundcolor (int)
Sets the background color of the selected week
Android:showweeknumber
Setshowweeknumber (Boolean)
Set whether to show the week
Android:shownweekcount
Setshownweekcount (int)
Set the number of weeks to display
Android:unfocusedmonthdatecolor
Setunfocusedmonthdatecolor (int)
Sets the color of the month date text without focus
main class directly using the Java.exe command
Class Loader: responsible for loading the. class file into the inside and generating the corresponding class object for it . Although we do not need to care about the class loading mechanism, we understand this mechanism and we can better understand the operation of the program.The composition of the class loader:
Bootstrap ClassLoader Root class Loader
Extension ClassLoader Extension Class loader
Sysetm ClassLoader System Cl
return value -M2.invoke (obj, "hello");////call method of the person class + - // Gets the Class A member method that has a single parameter that has a public type of return value +Method m3 = C.getmethod ("getString", String.class,int.class); A // There is a return value, public object Invoke (Object Obj,object ... args) The return value is Object receive atObject ob1 = M3.invoke (obj, "Hello", 123); - System.out.println (OB1); - - // Gets a privat
"); - + //to invoke a member method with reflection A at //get byte file object -Class C =Class.forName (classname); - - //create an object without a parameter construct -Constructor con =c.getconstructor (); -Object obj =con.newinstance (); in - //Calling Methods toMethod m =C.getmethod (methodname); + M.invoke (obj); - the //after that you want to invoke which class of which method, only need to go to configur
("Zhang San", 13, "Hometown");9System.out.println (b);//Person [Name= Zhang San, age=13, address= hometown]Get the private parameter construction method by reflection and use:1 //gets the specified private constructor method2Constructor C1 = C.getdeclaredconstructor (String.class);3 4 //Public void Setaccessible (Boolean flag):5 //A value of flag of TRUE indicates that the reflected object should cancel the Java language access check when it is used. 6C1.setacces
problems.1. When the ListView is dragged, the background picture disappears into a black background. Wait until we have finished dragging our own background image to show it.Issue 1 has the following code knot to resolve Android:scrollingcache= "false"2, the top and bottom of the ListView has a black shadow.Problem 2 is resolved with the following code: android:fadingedge= "None"3, Lsitview between each item need to set a picture to do as the interval.Problem 3 is resolved with the following co
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