idvd 09

of the Entity class:1, the attributes of the entity class are generally decorated with private . 2, according to business needs and packaging requirements for the attributes of the entity class to provide a getter/setter method, responsible for reading and assigning properties, general use of public decoration. 3, the entity class to provide a non-parametric construction method, according to business needs to provide a corresponding parameter construction method. 4, entity class best implement

. When set to absolute positioning, out of the document flow, does not occupy a single line, not affected by the floating2. When set to absolute positioning, the orientation of the element is affected by the top,left,right,bottom of the form.position:relative;1. When set to relative positioning, there is no out-of-document flow2. When set to relative positioning, the orientation is relative to the parent tag of the element, and since the label is not out of the document flow, the label around it

3. Set the background imageBackground-image:url (relative path)----123.jpgPicture Stretch covered: background-size:coverPaving Direction: background-repeat:repeat-x/repeat-y/no-repeat (horizontal full/longitudinal/not full display upper left corner )Picture azimuth: background-position:10px 20pxImage fixed: background-attachment:fixed--------when the content on the background image is larger than the background picture, you can make the picture fixedMultiple picture azimuth calls: background-pos

the object Li_lei.The nature of an object can also be called by other methods, similar to the invocation of a class property, as in the Printgender () method.SummarizeInvoking a class property through self__init__ (): Automatically executes when an object is createdThe difference between a class property and the nature of an objecthttp://www.biyinjishi.com/products/a65-b6535/Http://www.biyinjishi.com/products/a65-b6550/http://www.biyinjishi.com/products/a65-b6560/http://www.biyinjishi.com/produ

, which hides all out-of-scope content. such as:　　3.scrollSetting the overflow value to scroll will hide the contents of the box, but it will provide a scroll bar to scroll inside the box to see what remains. Such as:It is worth noting that the use of scroll will produce both horizontal and vertical two scroll bars, if only one of the content needs to be Overflow-x:hidden;overflow-y:hidden; To control the hiding of scroll bars! Such as: Overflow-x:hidden; Overflow-x:hidden;

the form's top left-right bottom.2. Relative positioning positon:relative(1), when set to relative positioning when not out of the document flow, will be affected by the float (float).(2), when set to relative positioning, the azimuth (top left right bottom) is relative to the parent tag of the element, because the label is not separated from the document flow so that the label around it is occupied position.3, fixed positioning positon:fixed(1), when set to fixed positioning, out of the docume

[C # advanced series] 09 attributes, Attributes can be divided into non-parameter attributes and parameter attributes (I .e., indexer ). The advantages of attributes over fields are not only encapsulation, but also some additional operations during reading and writing, caching some values or delaying the creation of some internal objects, it is also suitable for accessing fields in thread-safe mode. The most basic attributes will not be discussed. Bas

----used to specify the destination window or frame (_blank returns information displayed in the newly opened browser window, _self the current browser window)③ form ElementsType=reset Reset Button controlsType=submit SubmitType=image imageType=checkbox check boxType=radio Radio BoxType=file File Upload ControlType=hidden Hidden Fields④ drop-down boxchange check: Size: Set the sizes of the Select ⑤ Multi-line input box textareaRows and cols: Sets the height and width of the multiline input boxm

stringToString () {returnMy. ToString (); } }Microsoft recommends that all generic parameter names start with T, as if the interface is the same as I, which is a generic specification for encoding.4 What are the primary and secondary constraints of genericsEach generic parameter can have at most one primary constraint, and the primary constraint for generics is that the specified generic parameter must be or inherit from a reference type, with two special primary constraints: class an

whether to use Get or post:Get: Simple and fast, most cases availablePost Unable to use cache file (update file or database on server) Send a large amount of data to the server (POST has no data volume limit) Post is more stable and more reliable than GET when sending user input with unknown characters 2. Get response ResultsTwo: ResponseText (get the response data in string form) Responsexml (get the response data in XML form), these two are also XMLHttpRequest object met

----intercepts the character, which does not include the character that terminates the position, and the second parameter defaults from the start position to the end of the string.4.SUBSTR----intercept n lengths from the starting position5.indexOf----Gets the position of the first occurrence of a character, if there is a second argument s, indicating the first occurrence of this character from S6.lastindexof-----Ibid, the difference lies in looking forward from behind.7.PARSEINT----string Conver

Overflow PropertiesAll major browsers support the overflow property. The overflow property specifies what happens when the content overflows the element box. Value Describe Visible The default value. The content is not trimmed and is rendered outside the element box. Hidden The content is trimmed and the rest is not visible. Scroll The content is trimmed, but the browser displays scroll bars to see the rest of the

not recommended, especially for beginners. This also completely violates the idea of the separation of content and display.3. CSS AnnotationsComments for CSS:/* */HTML annotations:JavaScript Comments:/* *//4. CSS Text style ⑴ fontfont-family: "Microsoft Yahei";　　⑵ Text Sizefont-size:24px;　　⑶ text colorcolor:red;　　⑷ text thicknessfont-weight:800;　　⑸ text underline, strikethrough, top dash, no dashText-decoration:underline;　　Text-decoration:line-through;　　Text-decoration:overline;　　Text-decoratio

=0;for (var i=1;i101; i++) {isum+=i; }alert (isum);Interpretation: The same example 10(4)break: Jump out of the entire for loop body"Example 12"var isum=0;for (var i=1;i101; i++) {if (I==5) {break; } isum+=i; }alert (isum);Interpretation: When i==5, break jumps out of the for loop body, so the isum=1+2+3+4=10 is directly output　　(5)continue: Jump out of the loop under current conditions and proceed backwards"Example 13"var isum=0;for (var i=1;i101; i++) {if (I==5) {continue; } isum+=i; }

JAVA programming (09) ----- the initial application of Object design, the tortoise and the hare race 1. The common attributes and methods of turtles and rabbits are made into parent classes to avoid repeated code Package com. lovo;/*** class: Animal * @ author Abe * attribute: name of the day on which the step is from the total distance to sleep */public class Animal {protected String name; protected int step; protected int distance; protected int sl

arrayobj.pop (); Removes the last element and returns the element value Arrayobj.shift (); Removes the first element and returns the element value, and the elements in the array are automatically moved forward arrayobj.splice (Deletepos,deletecount); Removes the specified number of DeleteCount elements from the specified position, Deletepos, and returns the removed element 5, The Intercept and merge Arrayobj.slice of the array (start, [end]); Returns the part of the array as an array, noting th

2016/09/21 Java keyword final, 2016 final1. final class The final class cannot be inherited and has no subclass. The methods in the final class are final by default. The final class cannot be inherited. Therefore, the member methods of the final class have no chance to be overwritten. By default, they are all final.2. final Method The final method cannot be inherited by the quilt class, but can be inherited.3. final variable The final modified member

, less than or equal to, greater than or equal to, and greater than the given key. class 3rd, gets the keyset. Navigablekeyset, Descendingkeyset get the key set of the positive sequence/reverse order respectively. 4th class, gets a subset of key-value pairs. 6 DictionaryDictionary is defined as follows:Public abstract class DictionaryNavigablemap is the interface for key-value pairs defined by JDK 1.0, and it also includes basic functions for manipulating key-value pairs.Dictionar

-style:Italic;Color:Red;}/*#style2就是id选择器*/#style2{font-size:30px;Background-color:Silver;Color:Black;}/*#style2 Span is the parent-child selector, #style2是父, span is the child*/#style2 span{Font-style:Italic;Color:Red;}/*#style2 Span is a parent-child selector, #style2是父, span is a child, also contains a hierarchical relationship*/#style2 span span{font-size:50px;}The benchmark here is this: in the CSS file, the . class file is defined later, which shows its effect : for example, the. Style4 de

Open the new Java Package WizardYou can use the New Java Package Wizard to create a Java package. The Java Package Wizard opens in the following ways: By clicking on the "File" menu and selecting New > Package Select > Package in the Package Explorer by right-clicking the mouse Click the package button () on the tool bar If you are creating a child package, select the parent package before opening the Create Java Package Wizard so that the Name field has the value of the parent pac