simple shopping cart program in java

The basic knowledge of the sense of learning a lot, but has not been clear a project of the actual development process, so it is through this small ledger program to comb. Because the landlord is also out of the learning stage rookie, so the program may have a variety of metaphysical bugs, hope to raise it together.Key Features Consumption at a glance Record consumption information Consumer class

statement (starting at 1), the second parameter is the parameter value setPreparedstatement.setstring (1,"user aloof and pale wolf"); //issuing SQL execution queries to the database, querying the result setResultSet =Preparedstatement.executequery (); //traversing query result sets while(Resultset.next ()) {System. out. println (Resultset.getstring ("ID") +" "+ resultset.getstring ("name")); } } Catch(Exception e) {e.printstacktrace (); } finally { //Freeing Resou

.printstacktrace (); } } }); Textfield.setbounds (14, 322, 395, 24); Frame.getcontentpane (). Add (TextField); Textfield.setcolumns (10); Lblnewlabel_1=NewJLabel (); Lblnewlabel_1.setbounds (516, 314, 143, 41); Frame.getcontentpane (). Add (Lblnewlabel_1); This. SetTimer (Lblnewlabel_1); TextArea=NewJTextArea (); Textarea.setlinewrap (true); Textarea.setwrapstyleword (true); Textarea.setbounds (14, 13, 395, 296); Frame.getcontentpane (). Add (TextArea);

　Before talking about the subject, first to wordy two sentences, O () ^︶) O Alas, not to say that there is a lump in the heart, perhaps this is called obsessive-compulsive, well said I want to wordy, in fact, that is, about the Java Development Toolkit download and environment configuration. Java download into the Oracle official website to download (the specific steps will not repeat the network resources

Run a simple Java program after deploying JDK in Linux Preface The previous article explains in detail how to install a virtual machine + Linux System Under VMware and successfully deploy JDK. However, after the JDK is deployed, we determine whether the deployment is successful based on whether the "java-version" comma

This article mainly introduces how to access mysql database data and perform simple operations in Java programs, for more information about how to connect Myeclipse to the mysql database, see the previous article, this article describes how to access data in the mysql database in a Java program and perform

ObjectiveThe previous article explained in detail how to install the virtual machine +linux system in a Windows environment and successfully deployed the JDK.But after we deployed the JDK, we judged that the success of the deployment was based on whether the "java-version" command had the correct content to print, perhaps not too convincing. May be able to run a correct Java

A simple case of invoking C + + programs in a Java Web project This is a DLL program that invokes C + + through JNI technology through Java calls Before you start, learn what some JNI is. ： JNI is the abbreviation for Java Native interface, which is called

Developing a Java application typically consists of three steps :1. Create a source file with the file name extension *.java1). Using the editor (such as Notepad, the notepad++ is used), enter the following 6 lines of text:1 // A simple application example: print a line of text 2 class Hello {3 Public Static void Main (String args[]) {4 System.out.println ("Hello

Write a simple Java program with Notepad The first step:Install the JDK, and set the environment variables in place.Desktop-Computer (right-click)-Properties-Advanced system settings-environment variable-path-after variable value, and JDK installation path Plus (path is C:\Program files\

Java programs perform output in two simple ways:1. System.out.println ("content required for output"); This method can be see running a simple Java programResult diagram:2. System.out.print ("content to be exported");　1 Public classHelloWorld2 {3 //Java

First select the menu File-new-maven project and tick the "Create a simple project (skip archetype selection)" Entry:Create a new MAVEN project, first configure the Web. XML (web-inf directory) file to find So for ADD.JSP file is the main page of the addition program, its code ispageencoding= "UTF-8"%>+(Note: The value of the name attribute in the input tag must be the same as the value in the new

How to access the data in the mysql database in a Java program and perform simple operations, javamysql In the previous article, I introduced how to connect Myeclipse to the mysql database. Through this article, I will introduce how to access the data in the mysql database in Java programs and perform

= = Targetnumber) {p3isright = true;}if (p1isright| | p2isright| | P3isright) {System.out.println ("We have a winner!");System.out.println ("Player one got it right?") +p1isright);System.out.println ("Player got it right?") +p2isright);System.out.println ("Player three got it rigt?") +p3isright);System.out.println ("Game is over!");Break ;}else {System.out.println ("Player has to try again!");}}}}class player{int number = 0;Public void Guess () {Number = (int) (Math.random () *10);System.out.pr

Recently more busy, has been taking time to review some Java technology applications.Nothing to do today, based on the UDP protocol, wrote a very simple chat room program.The current job, rarely used sockets, is also a simple memory of the Java network programming.First look at the effect:The effect of the implementati

This article introduces the simple e-mail Sender program Java Implementation Code, shared for everyone to reference, the specific contents are as follows In this code, there are a few points of attention to emphasize :1, use the Socket with the SMTP mail server to obtain a connection, note the host name of the SMTP server;2, the use of the data command, if the

Recently, I have been taking the time to review some Java technology applications.Nothing to do today, based on the UDP protocol, wrote a very simple chat room program.Now work, rarely use socket, also is a Java network programming aspects of a simple memory. First look at the effect: The effect of implementation c

When writing Java simple program code, the default file name is usually the same as the class name of the main class (the class where the main method is located), and the Java code naming rules are as follows, the class name must be named by Pascal, that is, the first letter of each word is capitalized. For example, He

"Target task" through the site to collect the country's mobile phone number segment into the database table "Complete Process" 1, the beginning of the regular expression, learn to write simple regular expression 2. Get a single page content, learn basic IO stream in Java 3. Insert the data into the MySQL database table and master the basic JDBC programming. 5. Get the full URL of each city via URL stitching

an input stream +FIS =NewFileInputStream ("D:\\tengyicheng\\timg.jpg"); Adis =NewDataInputStream (FIS); at //Create an output stream -FOS =NewFileOutputStream ("D:\\tengyicheng\\myfile\\timg.jpg"); -DOS =NewDataOutputStream (FOS); - //Loop Read Input - inttemp; - while(temp = Dis.read ())!=-1){ in Dos.write (temp); - } to}Catch(IOException e) { + e.printstacktrace (); - } the finally{ * Try { $