libreoffice basic programming

Fill menu in the upper-right corner//Click eventsToolbar.setonmenuitemclicklistener (NewToolbar.onmenuitemclicklistener () {@Override Public BooleanOnmenuitemclick (MenuItem item) {Switch(Item.getitemid ()) { Caser.id.action_settings://........ CaseR.id.action_refresh://........} toast.maketext (Getapplicationcontext (),"Zcx", Toast.length_short). Show (); return true; } });4. Set Theme Style Defines the Theme.AppCompat.Light.NoActionBar of toolbar theme inheritanc

40 48 5 6 64 72 9 18 27 36 45 54 63 72 81Break forRowinchRange (1, 10): forColinchRange (1, 10): Prod= row *ColifCol = = 5: Break ifProd : Print(' ', end ="') Print(Row * col,' ', end="') Print() Result:1 2 3 4 2 4 6 8 3 6 9 12 4 8 12 16 5 10 15 20 6 12 18 24 7 14 21 28 8 16 24 32 9 18 27 36Contiune forRowinchRange (1, 10): forColinchRange (1, 10): Prod= row *ColifCol = = 5: Continue ifProd : Print(' ', end ="')

Public Static voidMain (string[] args) {6Eventqueue.invokelater (NewRunnable () {7 Public voidrun () {8Simpleframe frame=Newsimpleframe ();9 frame.setdefaultcloseopration (jframe.exit_on_close);TenFrame.setvisible (true); One } A }); - } - } the - classSimpleframeextendsJFrame { - Private Static Final intdefault_width=300; - Private Static Final intdefault_height=200; + PublicSimpleframe () { - setSize (default_width,default_height); + } A}By default, the

block a group of threads until an event occursLatching is used to wait for events while fences are used to wait for other threads. Latching is a one-time object that cannot be reset once it enters the terminating stateVi. building an efficient and scalable result cacheFirst, the HashMap is considered, and the Sychronized method is used to satisfy the atomicity–> performance is poor, only one thread at a time to perform the calculation, using Concurrenthashmap to improve performance, without usi

voidhandleoperator (String text) {/*make a judgment of arithmetic operation*/ Switch(operator) { Case"+": Resultnum+ = Double.parsedouble ( This. Result.gettext ()); Break; Case"-": Resultnum-= Double.parsedouble ( This. Result.gettext ()); Break; Case"*": Resultnum*= double.parsedouble ( This. Result.gettext ()); Break; Case"/": Resultnum/= double.parsedouble ( This. Result.gettext ()); Break; Case"=": Resultnum= Double.parsedouble ( This. Result.gettext ()); Break; }

JOBSS: A Java EE-based open source application server, JBoss code follows the LGPL license and can be used free of charge in any commercial application. JBoss is a container and server that manages EJBS and supports the specifications of EJB 1.1, EJB 2.0, and EJB3. However, the JBoss Core service does not include web containers that support servlet/jsp, and is typically used with Tomcat or jetty bindings. Characteristics:1. The JMX micro-kernel service as its bus structure;2. Service-oriented ar

as an IDE for Java development, Eclipse has been around for many years now, and its rich features, ease of operation and increased productivity have been favored by the vast majority of developers.When you open eclipse, there is an English word in the bottom right of the interface eclipse, which is the code name of Eclipse, each version code is different.-------Here are excerpts from the Web----------Eclipse has been using Jupiter's satellites as a version name since 3.1, for example:Europa: Io

loop;Continue resumes from the top of the loop after exiting the loop1.5.7 Switch statementswitch (expression): {Case value1:StatementBreakCase Value:2StatementBreakDefaultStatement}1.5.8 with statementsThe function of the WITH statement is to set the scope of the code to a specific objectWith (expression) statement;1.5.9 Label StatementUse the Label statement to add tags to your code for future useLabel:statement;1.6 Functions(1). Disclaimerfunction functionname (arg0,arg1,arg2,..., ArgN) {Sta

First, underfined and null1. When declaring a variable using VAR, but not initializing it, the value of this variable is underfinedA 2.null value represents an empty object pointer, and if the defined variable is used in the future to hold the variable, it is better to initialize the variable to null instead of the other valueThe 3.underfined value is derived from null so alert (null==underfined)//trueTwo, Boolean type1.Boolean only two literal literals can only be written as true, False and not

Linux Print("From client msg:%s"%data) Conn.send (Data.upper ())#Send Message exceptException: Breakconn.close ()#Hang up the phonePhone.close ()#turn off the machine#ClientImportsocketclient=Socket.socket (socket.af_inet, socket. Sock_stream) Client.connect (("127.0.0.1", 8080))#Dial Phone whiletrue:msg= Input (">>>:") Client.send (Msg.encode ("Utf-8")) Data= CLIENT.RECV (1024) Print(data) client.close ()v. UDP-based socketsUDP is non-linked, starting at which end will not

1. Use the shell or Python to write a square (oldboy4.sh) to receive the number entered by the user.For example: with the + number implementation[Email protected]:~/script$ vim Oldboy_squarel.SH[email protected]:~/script$./oldboy_squarel.SHPlease Enter a number:4++++++++++++++++++++++++++++++++[email protected]:~/script$CatOldboy_squarel.SH#/biin/Bashread-P"Please Enter a number:"Num for((i=0;i)){ for((j=0;j2; j + +)) { Echo-N"+" } Echo}2. Write a isosceles triangle (oldboy2_

subclass. To execute the constructor of the parent class, you need to call Parent::construct () in the constructor method of the child class. Method overrides: If a method inherited from a parent class does not meet the requirements of a subclass, it can be overridden, a procedure called method overrides, also known as a method. 4. Access control The access control of a property or method is implemented by PHP by adding the keyword public (publicly), protected (protected), or

Assigning values to variablesThe commonly used variable assignment is to use "=" to assign values.1 int 2;However, if you assign a floating-point number to I, it will result in a loss of precision, preferably in C + + using the initialization list of the way "{}" to assign a value to the variable, so as to ensure that some types of information loss may cause the conversion of the type1 #include 2usingnamespace std; 3 4 int Main () {5 int I {2.3}; 6 return 0 ; 7 }For example, the compile

execution results +++++++++++++++++public class Paramtest{public static void Main (string[] args){Person Person=new person ();Person.change (person);int age=person.age;System.out,println (age);int i=10;Person.change2 (i);System.out.println (i);}}Class Person{int age = 20;public void change (person person){Person=new person ();person.age=30;}public void Change2 (int.){age=40;}}Name of class with hump identification: AddthreeintName of method first letter to lowercase addthreeint (int a,int b)Pro

TCP Transmission (Transmission Control Protocol): The TCP protocol is a connection-oriented, reliable byte-stream service. Before the client and server Exchange data with each other, a TCP connection must be established between the two parties before the data can be transmitted. It sends an error-free stream of bytes from one host to other hosts on the Internet. At the sending side is responsible for the transfer of the upper stream of bytes into the message segment to the lower layer. The recei

and sent to the browser together. Both ASP and JSP are WEB server-oriented technologies, and client browsers do not require any additional software support. ASP's programming language is the scripting language such as VBScript, JSP uses Java, this is the most obvious difference between the two. In addition, there is a more fundamental difference between ASP and JSP: The two language engines handle embedded program code in a page in a completely diff

(expression-list) indicates a call to a constructor. If Simple-type-name is a base type, the expression list must be a single expression, and the expression indicates that the value of the expression will be converted to the underlying type. This class casts an expression to mimic a constructor. Because this form allows the use of the same syntax to construct basic types and classes, it is particularly useful when defining template classes. The Cas

Python is an increasingly popular scripting language today, it is simpler than Java, more powerful than PHP, and also applicable to the development of desktop applications, in Ubuntu, is a necessary script engine, so it is necessary to learn, the article here only for a certain programming basis, It is better to be familiar with PHP or JavaScript users, if there is no basis for novice suggestions to find more detailed tutorials to learn. Python varia

The fold,foldbykey,treeaggregate of the basic RDD operator for Spark programming, Treereduce1) Fold def fold (zerovalue:t) (OP: (T, T) + t): T This API operator receives an initial value, the fold operator passes in a function, merges two values of the same type, and returns a value of the same type This operator merges the values in each partition. Each partition is merged with a zerovalue as the initial

The join,rightouterjoin of the basic RDD operator for Spark programming, Leftouterjoin1) Join def Join[w] (other:rdd[(k, W)]): rdd[(k, (V, W))] def Join[w] (other:rdd[(k, W)], Numpartitions:int): rdd[(k, (V, W)) ] def Join[w] (other:rdd[(k, W)], Partitioner:partitioner): rdd[(k, (V, W))] Make an inner connection to the value of the RDD for the type of the key value, as key. The value type returned is also