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POinternet site Java Applet with firebird database
 

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  1. POinternet site Java Applet with firebird database
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    <p>i have some project to make for mys self, but i can not resolve a puzzle :) for example i have such a code, but it is nor working on my website</p> <p>it throws: <code>NoClassDefFoundError</code></p> <ol> <li><p>I create file .java and link it with database(?)</p> <pre><code>package firebird; import java.sql.*; public class Firebird { public static void main(String[] args) throws ClassNotFoundException { String pathToDatabase; String userName; String password; String sql; sql = "SELECT * FROM EMPLOYEE"; password = "masterkey"; userName = "sysdba"; pathToDatabase = "C:/Program Files/Firebird/Firebird_2_5/examples/empbuild/EMPLOYEE.FDB"; try { Class.forName("org.firebirdsql.jdbc.FBDriver"); } catch(ClassNotFoundException cnfe) { System.out.println(cnfe.toString()); System.out.println("org.firebirdsql.jdbc.FBDriver not found"); } // Retrieve a connection. try { Statement stmt = null; ResultSet rst = null; Connection conn = DriverManager.getConnection( "jdbc:firebirdsql:localhost/3050:" + pathToDatabase, userName, password); try { stmt = conn.createStatement(); rst = stmt.executeQuery(sql); int columnCount = rst.getMetaData().getColumnCount(); int recordIndex = 0; while(rst.next()) { recordIndex++; System.out.println("Record: " + recordIndex); for (int i=1;i&lt;=columnCount;i++) { System.out.print(rst.getMetaData().getColumnName(i)); System.out.print(": "); System.out.println(rst.getString(i)); } } } finally { // close the database resources immediately, rather than waiting // for the finalizer to kick in later if (rst != null) { rst.close(); } if (stmt != null) { stmt.close(); } conn.close(); } } catch(SQLException se) { System.out.println(se.toString()); } } } </code></pre></li> <li><p>I compile code with console and get .class file</p></li> <li><p>I create a .html file with following code:</p> <pre><code>&lt;HTML&gt; &lt;HEAD&gt; &lt;TITLE&gt;Java_DB&lt;/TITLE&gt; &lt;/HEAD&gt; &lt;BODY&gt; Svetainė parašyta su java ir joje duombazė &lt;BR&gt;&lt;BR&gt; &lt;applet code="Firebird.class" width="1000" height ="500"&gt; &lt;/BODY&gt; &lt;/HTML&gt; </code></pre></li> </ol>
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    1. USgalvakojis
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    1. COAre you using an IDE? It depends on how you are running the application. You can debug it by following this - http://javareferencegv.blogspot.com/2013/10/debugging-javalangnoclassdeffounderror.html
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      1. USGaurav Varma
 

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