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Using Java to implement simple chat applet

();}catch (Exception e) {e.printstacktrace (); }}//public static void Main (string[] args) {//Qqmain main=new qqmain ();//Main.setvisible (TRUE);//}}//Chat record interfacePackage Qq1;import Javax.swing.jframe;import javax.swing.jtextarea;import java.io.file;import java.io.FileReader;  Import Java.io.bufferedreader;public class Qqchat extends jframe{private JTextArea areamess;    Public Qqchat () {areamess=new jtextarea ();    Areamess.seteditable (FALSE);    Chatfile ();    This.add (areamess)

Java Applet Getting Started example

An example of the preparation activity before: 1. To have a Java compiler, it can be the sun's JDK compiler, it can be Microsoft's vj++, or it could be a compiler developed by some other companies. 2. A text writing software, the general machine has, Notepad can be. If it is vj++, you can save this step, if the JDK, it is best to have one. 3. Browser, can be Netscape, of course, can also be Microsoft's IE, other browsers, I do not know whether to s

First Java applet

1. Enter Java Hello under DOS command with the following results:Bad command or the file name, which can be caused by:Bad command or file name (Error command or file name) Bad command or file name is incorrect for commands or file names that do not recognize the input command. You should check to make sure that the command file is found in the specified directory or on the search path specified with the path command, to ensure the correctness of the i

Java 7 Update 21 fix vulnerabilities and change applet warning information

Oracle released 21st versions of Java 7 on Tuesday. This version contains 42 security problems to fix and modify the behavior of Java programs running on the browser. 39 vulnerabilities fixed in Java 7 Update 21 (7u21) can be exploited remotely without authorization and are mentioned in Oracle statements. These vulnerabilities are more related to the

Java Simple applet app creation.

Recently because of homework, we need to use Java to do some drawing applications, and displayed on the Web page. So, I'm doing some demonstrations here. (There is a mistake, please forgive me)First, you can have the IDE write the good one package first,Here I put the required. class files into this package.Note that in Java applet Chinese, I introduced this pack

Using Java to develop a double-click execution applet

Before we used Java to write a lot of things, but it seems that there is no practical significance.Because of the meaning of the desktop applet has to have an interface, but the interface is not very good to engage in. Or there are fewer people who understand this level.Yes, you have to open up some pages to introduce AWT and swing ...Forget to put this double-click execution of the small program to contrib

Java applet of the cottage version of Super Marie

Java applet of the cottage version of Super Mariefirst, The basic function of the game1, can walk left to right (keyboard Monitoring) 2, can jump 3. Capable of firing bullets 4. Ability to detect collisions between obstacles 5. Movement of background images second, the game running interfacethree, The game roughly realize the Idea:1. form2. Add your own role3. Adding a background image4. the movement

Java connection Oracle execution stored procedure applet

The following is a small routine where the Java connection Oracle executes a stored procedure that does not return a value.packagecom.test;importjava.sql.*;p ublicclassprocedure{ Publicstaticvoidmain (String[]args) { Connectionct=null;CallableStatementcs=null; try{ class.forname ("Oracle.jdbc.driver.OracleDriver"); ct=drivermanager.getconnection ("JDBC:ORACLE:THIN:@10.8.2.73:1521:ORCL", "Scott", "123456"); cs=ct.preparecall ("{Callpro_book (?,?,?)}"

A Java-written batch rename file applet

the file suffix name uniformly?" Please enter the format (), otherwise please enter n/n: "); String input=Sc.next (); Sc.close (); if(Input.equals ("n") | | input.equals ("n")) ) {Usedefaultsuffix=true; return NULL; } Else{Usedefaultsuffix=false; Input="." +input; returninput; } } //provides static methods Public Static voidbegin () {Renametool T=NewRenametool (); T.rename (); } //Main function Public Static voidMain (string[] args) {Renametool T=NewRenametool ();

Java Applet Tic-Tac-String game-how to start again? (Leave problem)

() {SetBorder (New Lineborder (color.black,1));Addmouselistener (New Mymouselistener ());//register Listener}/**return token*/Public Char GetToken () {return token;}/**set a new token*/public void Settoken (char c) {token = c;Repaint ();}/**paint the cell*/protected void Paintcomponent (Graphics g) {Super.paintcomponent (g);if (token = = ' X ') {G.drawline (Ten, GetWidth () -10, GetHeight ()-10);G.drawline (GetWidth () -10, ten, Ten, GetHeight ()-10);}else if (token = = ' O ') {G.drawoval (Ten,

Composition of Java applet source files

The Java applet has three source files, and the suffix name is. Java,.class and. Jar. The only. java file allows you to read and modify (and, of course, you need to know a little Java programming), but. java files cannot be appli

Java Multi-threaded applet hibernation, pause, and stop

1? FalseDo you want to stop 2? FalseEnd A way to stop a thread?? Add a judgment in run and if it stops, break jumps out of the loop body.public class MyThread extends Thread { @Override public void run() { for (int i = 0; i Output result (end): 160560160561160562160563160564EndIt's already stopped, I'm quitting. ?? Although the above code can stop the thread, it will continue to execute if there is a statement later in the for.?? Therefore, the following methods

"Go" Java applet: Create your own class library in Eclipse and use it for different projects

Original source: http://blog.csdn.net/leixingbang1989/article/details/30491789Win7 Enter service to start running Services.mscIn multiple projects, the same jar package may be used, and if we build a library of our own that stores all the jar packages needed for all projects, we can avoid the hassle of duplicate imports. Take a look at the main steps and procedures of the operation.Eclipse--->preferences (preference)---->java-->build Path--->userlibir

Java drawing Applet

must be replaced with a new one.Gg = Bi. getgraphics ();// The paint brush is white by default.GG. setcolor (mycolor );// To prevent a messy image from being opened, process it.This. xbegin = 100;This. ybegin = 0;This. xend = 0;This. yend = 0;This. repaint ();}Catch (exception ex){Ex. printstacktrace ();}}}Else if (E. getsource () = This. butsave) // save{Int I = jfc. showsavedialog (this. F );If (I = jfilechooser. approve_option){Try{// Save the image// Parameter Buffer location of the image t

Appearance Mode applet Java source code

(advertisement);Charge=new charge (Checkword);Typeseting=new typeseting (advertisement);}public void Doadvertisement () {Checkword.setchargeamount ();Charge.givecharge ();Typeseting.typeseting ();}}public class Application {public static void Main (string[] args) {Clientserverfacade Clientserverfacade;String clinetadvertisement= "Moonlight Computer, Price 6356 yuan, tel: 1234567";Clientserverfacade = new Clientserverfacade (clinetadvertisement);Clientserverfacade.doadvertisement ();}}This artic

Java algorithm applet (1)

stack1.}public int pop () {int val= 0;Put the contents of the Stack1 in reverse into the Stack2while (!stack1.empty ()) {Stack2.push (Stack1.pop ());}if (!stack2.empty ()) {val = Stack2.pop ();} else {System.out.println ("Queue is empty, return default value 0");}After the implementation of the queue, but also to the contents of the Stack2 back to Stack1while (!stack2.empty ()) {Stack1.push (Stack2.pop ());}return Val;}public static void Main (string[] args) {Solution s = new solution ();S.push

Java applet 3Arrays (2015-8-27)

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

Java applet 1 (2015-8-13)

1.public class test1{public static void Main (String [] args) {/* int sum=0;for (int i=0;iif (i%2!=0) {Sum+=i*i;}}System.out.println ("The Sum of 12+32+52+...+992 is:" +sum); */int sum=0;for (int i=1;iSum+=i*i;}SYSTEM.OUT.PRINTLN (sum);}}2.public class test2{public static void Main (String [] args) {/* Double sum=0;for (int i=0;iif (i%2!=0) {sum=sum+1.0/i;}}System.out.println ("1+1/3+1/5+ ... The sum of the first 20 items is: "+sum"; */Double sum = 0;for (double i=1;isum = Sum +1/i;}System.out.p

Java applet 1 (2015-8-2)

) {Scanner scan=new Scanner (system.in);System.out.print ("Please enter five number:");Double a=scan.nextdouble ();Double b=scan.nextdouble ();Double c=scan.nextdouble ();Double d=scan.nextdouble ();Double e=scan.nextdouble ();Double sum=a+b+c+d+e;Double product=a*b*c*d*e;System.out.println ("The sum of five data is:" +sum+ "\ n Five data of the product is:" +product);}}4. Enter 3 numbers from the keyboard, an int type data, a double type, a float type data, and a sum of 3 numbers.Import Java.ut

Java Applet Digital Signature

shadow part is the exported certificate, and the end isCERTThe blue part is manually exported and placed in the corresponding folderJarPackage. You can name the shadow part by yourself. The key password entered for the first time. The certificate and signature will be exported later.JarPackage is required. The first step is to enter the name, unit, and other information required to generate the key. After the signature is complete, you can directlyJarUsed in the project. First loadApp

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