Accessing the database using Java applets (reprint)

accessing databases using Java applets
Learn any program language, of course, with the database, Java just born, the support of the database is not very good, after several years of development, its support for the database has been fully reached the ripe situation. Because this is mainly to introduce Java applets applet, therefore, it is not possible to use a large space to introduce the knowledge of the database, how to build and design a database, or please find some books to see their own! Here, I can't.
Here we use the Microsoft Access database as an example to illustrate how to implement a database open and read knowledge.
First step:
Use Microsoft Access to create a database, which is what I use for this example.
The second step: that is, the process of editing.
1 define variables, and the variables are defined as follows:
TextArea thevisits=new TextArea (6,80);
Displaying the contents of a database
TextField thestatus=new TextField ("", 80);
Displays information about opening the database. Equivalent to the status bar of the program
Connection theconnection; How to connect to a database
Statement thestatement; Represents a database command sent to the database for execution
ResultSet Theresult; Read the result of the data, which is the result of the database return
ResultSetMetaData Themetadata;
Contains useful information about returning results after the execution of a database command.
String Thedatasource; Contains the name of the database or data source being accessed, expressed as a URL.
String theuser; User name of the database
String Thepassword; Password for the database