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POadding jars to your program
 

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    <p>i have a simple Demo.java file in <strong>D:\jarConcepts</strong> directory:</p> <pre><code>import javax.swing.* ; class Demo{ public static void main(String args[]){ JFrame frame = new JFrame("") ; frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE) ; Class c = null ; try{ c = Class.forName("com.mysql.jdbc.Driver") ; //com.mysql.jdbc.Driver class is in a jar file //whose class path is set in the environment variable(explicitly done by me) //when i am executing Demo.class using java command, it displays frame with OK title //but if i execute this by creating a jar, it enables to load the //com.mysql.jdbc.Driver class, //thus displaying frame with Sorry title frame.setTitle("OK") ; } catch(ClassNotFoundException cnfe){ frame.setTitle("Sorry") ; } frame.setVisible(true) ; } } </code></pre> <p><strong>I prepared a manifest.txt file in D:\jarConcepts with following text :</strong></p> <p>Main-Class: Demo</p> <p>Class-Path: C:\Program Files\MySQL\MySQL Tools for 5.0\java\lib\mysql-connector-java-5.0.4-bin.jar</p> <p><strong>when, i create a jar file from the same directory using</strong></p> <p>jar -cvfm Demo.jar manifest.txt .class</p> <p><strong>following is the output :</strong></p> <p>added manifest adding: Demo.class(in = 743) (out= 505)(deflated 32%)</p> <p><strong>But, when i execute the jar file generated, it shows an error message,</strong></p> <p>Could not find the main class. Program will exit.</p> <p><strong>i don't understand why this is happening, coz, when i creating the jar file with the following manifest code :</strong></p> <p>Main-Class: Demo</p> <p><strong>i am getting a perfectly executable Demo.jar, the only problem is that it is not loading the Driver class from the ] class path and when i am trying to add the path in the manifest, it's not working...... plz help.......</strong></p>
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