fundamentals of microelectronics

message, int delay) {this.message = message;//Create a timertimer timer = new Timer (delay, new TimerListener ()); Timer.start ();} public void Paintcomponent (Graphics g) {super.paintcomponent (g); if (Xcoordinate > GetWidth ()) {xcoordinate =-20;} Xcoordinate + = 5;g.drawstring (message, xcoordinate, ycoordinate);} Class TimerListener implements ActionListener {/** Handle actionevent */public void actionperformed (ActionEvent e) {Repai NT ();}}}}Implementing messages moving through windows"

Manipulate the window to display the action steps in the consolePackage Chapter16;import Java.awt.event.windowevent;import Java.awt.event.windowlistener;import javax.swing.JFrame ; @SuppressWarnings ("Serial") public class Testwindowevent extends JFrame {public testwindowevent () {Addwindowlistener ( New WindowListener () {///anonymous inner class @overridepublic void windowopened (WindowEvent e) {System.out.println ("open");} @Overridepublic void Windowiconified (WindowEvent e) {System.out.prin

Readtcp () throws exception{ServerSocket Ss=null;InputStream Is=null;try {Ss=new ServerSocket (8080);Socket s1=ss.accept ();Is=s1.getinputstream ();byte [] b=new byte[10];int Len;while ((Len=is.read (b))!=-1) {String Str=new string (b, 0, Len);System.out.println (str);}} catch (IOException e) {TODO auto-generated Catch blockE.printstacktrace ();}finally{if (is!=null) {Is.close ();}if (ss!=null) {Ss.close ();}}}}------------------------------------------------------------------------------------

) { for(intj = 0; J ) {System.out.print (Data[i][j]+ " "); } System.out.println (""); } }}The results of the program run as follows:6. Using the stream to print an array, we can convert the array to a stream and print it out.code example: PackageCom.himi.printarray;Importjava.util.Arrays;/** Use stream to print an array * We can convert it to a stream and print it out. */ Public classStreamarray { Public Static voidMain (string[] args) {//Arraystring[] Arraystr =Newstring[]{"Java

12th. Graphical Interface Basics1. is that class the root of the Java GUI component? is the container Class A subclass of component? Which class is the root of the swing GUI build?Java.awt.component is the root of all Java GUI component classes.A container class, such as JFrame, is a subclass of a component.JComponent is the root of the Swing GUI component class.2.AWT components different from swing build?The components of AWT are heavy and swing components are lightweight.3.You can add a button

private, create static final class object in Class =new class (); ___ Singleton mode Inherit extends The default inherits the properties and methods of the parent class public, implicitly inheriting private, and prohibiting subclass access Method and property with the same name override, to subclass first Polymorphic Parent class object =new subclass instantiation (); Down transformation Subclass up to parent class (cast) Abstr

1. Can a button trigger the windowevent? Can a button trigger MouseEvent? Can a button trigger ActionEvent?JButton can produce mouseevent and ActionEvent. Cannot trigger WindowEvent2. Can a single source have multiple listeners? Can a listener have multiple sources? Can a listener make its own listener?YES. YES. YES3. Can internal classes be used in other classes that are not nested in him?Objects of an inner class is often created in the outer class. But the can also create an object of a inner

request. HTTP is text-oriented, so each field in the message is a number of ASCII strings, so the length of each field is indeterminate. There are two types of HTTP messages in total, requesting messages and responding messages.1) Request message2) Response message Both the request message and the response message can be divided into three parts.1) Start line2) Header LineMy habit is to call the two parts above, the message header. The following section is called the newspaper style

1. Class loadingBootstrap ClassLoader-Boot (also known as primitive) class loader, which is responsible for loading Java's core classes. Extension ClassLoader-the extension classloader, which is responsible for loading the class pack of the jar in the JRE's extended directory (Java_home/jre/lib/ext or specified by the Java.ext.dirs system properties). System ClassLoader-Systems (also known as applications) ClassLoader, which is responsible for loading-classpath or Java.class.path System Properti

1, how to get the current working directory?String path=system.getproperty ("User.dir");2. What is the difference between string x = "abc" and string x = new String ("abc")?String x= "abc"; the x variable points to a string object in the data segmentstring x = new String ("ABC") points to a string object in the heap, which must be copied into the object using a string in the data segment as a template;3. What is the difference between string and StringBuffer?String Immutable property, when we ch

This is only a brief description of TCP sockets, let us first look at how to write a simple server, here first with Linux C to achieve. Time . h > int main (int argc, char** argv) { int listenfd, CONNFD; Socketlen_t Len; struct sockaddr_in servaddr, cliaddr; Char Buff[maxline]; time_t ticks; LISTENFD = Socket (af_inet, sock_stream, 0); Bzero (servaddr, (SA *)servaddr, sizeof (SERVADDR)); Listen (LISTENFD, Listenq); for (;;) { len = sizeof (CLIADDR);

operations, using for-in, for, while, and do-while for looping. Wrapping conditions and loop variable parentheses can be omitted, but curly braces on the body of the statement are required.(6.1) for in control flowLet Indivadulscore = [70,66,80,90,56,34]var score = 0For S in Indivadulscore{If s>60{Score + = 20}else{Score + = 100}}Note: Look at the differences in the syntax of the control flow you wrote earlier(6.2)? indicates an optionalvar optionstring:string? = "Hello,world"Optionstring = = N

the callback function.Interface Intcompare{public Boolean cmp (int x,int y);} Class CMP1 implements Intcompare{public boolean cmp (int x,int y) {if (x > Y) {return true;} Else{return false;}}} Class CMP2 implements Intcompare{public boolean cmp (int x,int y) {if (x > Y) {return false;} Else{return true;}}} public class selectsort_s {public static void Selectsort (int[] A, intcompare cmp) {for (int i = 0; i The above example defines an interface intcompare that is used to compare size, whic

to let the waiting person wake up **/classStudentextendsThread {Private intscore; @Override Public synchronized voidrun () {Try{System.out.println ( This. GetName () + "Start exam ..."); Thread.Sleep (3000); System.out.println ("The exam is over and the quiz begins."); Thread.Sleep (3000); Score= (int) (Math.random () * 101); System.out.println ("The quiz is over, you can check your grades now."); This. Notify (); } Catch(interruptedexception e) {//TODO auto-generated Catch blockE.printstacktr

provided by a server.A port number is a place of access to a service that distinguishes multiple services on the same physical computer.Sockets are used to connect the client and server, and each communication session between the client and the server uses a different socket.The TCP protocol is used to implement a connection-oriented session. The network-related features in Java are defined in the java.net package.Java uses the InetAddress object to represent an IP address with two fields: Host

; isizeof(b)/sizeof(Student); i++) - { Wu b[i].show (); - } AboutCin.Get(); $}View CodeUnfortunately, the program can not be compiled successfully, why?Because: the class is an abstract concept, not an entity, and cannot contain attribute values (here is the argument of the constructor), only the object occupies a certain amount of memory space, contains a definite attribute value!See: Http://pcedu.pconline.com.cn/empolder/gj/c/0503/568909.html.3. Calls to constructors and

initial value set, the compiler automatically generates a default static constructor. The default initial value of a global variable for a simple value type is 0 because the entry function is in class B, so the program first loads B, and because Y is a static member of B, the value of Y is computed when the class is loaded, but the value of Y is found to be obtained by assigning a value, and the value of x is immediately computed. X is initialized by the static constructor of Class A, and refe

target file in place of the function: Underscore + function name, while the standard calling convention is in the form of an underscore + the name +@x, and X is returned. where x represents the number needed to clean up the stack. For example:The Windows driver needs to use the standard calling convention, and for the DriverEntry function, the system will look for [email protected] as the driver's entry, but the VS2010 default is the C language calling convention. So there is only _driverentry,

, adjusting spacing, and so on.The order of the controls can be set at design time by selecting the controls you want to set, selecting the order under the format, and then clicking the put to bottom (or top-level) command to set.The control's alignment action is designed with the SHIFT or CTRL feature to select multiple controls, select the Alignment command under formatting, and pop up the alignment menu. Choose the alignment that applies to you.Using VS2012 is relatively easy, and the basic o

written in one programming language can communicate with code written in another language. Because the type is fundamental to the CLR, Microsoft has specified a formal specification called a "Common type System" (Common type Systems, CTS) that describes the type definition and behavior.Using the rules specified by the CTS, the Assembly establishes a visual boundary for a type, and the CLR enforces (implements) these rules. In fact, there is no need to learn the CTS rules in this province, and t