[Java] Fichier Ant et jar executable

Bonjour,

je ne comprends pas très bien comment se crée les fichiers

J'explique comment j'ai fait.
J'ai crée un répertoire Exo dans lequel, il y a 2 sous-répertoire src, classes ainsi que mon fichier Main.java
src contient les .java
classes doit contenir les .class

Dans src, il y a 2 fichiers Link et LinkedLink.
Dans ces fichiers, j'ai écrit sur la première ligne :

package src.Link;

pour le fichier Link.java

package src.LinkedLink;

pour le fichier LinkedLink.java

Dans le fichier Main.java,j'ai mis sur la 1ère ligne :

import src.Link;
import src.LinkedLink;

Je voudrais savoir comment faire créer ces fichiers avec la manière que j'ai décrit.

Merci

Cet exemple est tiré du lien suivant mais je n'y comprend rien...
http://ant.apache.org/manual/CoreTasks/jar.html

Examples

  <jar destfile="${dist}/lib/app.jar" basedir="${build}/classes"/>

jars all files in the ${build}/classes directory into a file called app.jar in the ${dist}/lib directory.

  <jar destfile="${dist}/lib/app.jar"
       basedir="${build}/classes"
       excludes="**/Test.class"
  />

jars all files in the ${build}/classes directory into a file called app.jar in the ${dist}/lib directory. Files with the name Test.class are excluded.

  <jar destfile="${dist}/lib/app.jar"
       basedir="${build}/classes"
       includes="mypackage/test/**"
       excludes="**/Test.class"
  />

jars all files in the ${build}/classes directory into a file called app.jar in the ${dist}/lib directory. Only files under the directory mypackage/test are used, and files with the name Test.class are excluded.

  <jar destfile="${dist}/lib/app.jar">
    <fileset dir="${build}/classes"
             excludes="**/Test.class"
    />
    <fileset dir="${src}/resources"/>
  </jar>

jars all files in the ${build}/classes directory and also in the ${src}/resources directory together into a file called app.jar in the ${dist}/lib directory. Files with the name Test.class are excluded. If there are files such as ${build}/classes/mypackage/MyClass.class and ${src}/resources/mypackage/image.gif, they will appear in the same directory in the JAR (and thus be considered in the same package by Java).

  <jar destfile="test.jar" basedir=".">
    <include name="build"/>
    <manifest>
      <attribute name="Built-By" value="${user.name}"/>
      <section name="common/class1.class">
        <attribute name="Sealed" value="false"/>
      </section>
    </manifest>
  </jar>

This is an example of an inline manifest specification. Note that the Built-By attribute will take the value of the Ant property ${user.name}. The manifest produced by the above would look like this:

Manifest-Version: 1.0
Built-By: conor
Created-By: Apache Ant 1.5alpha

Name: common/class1.class
Sealed: false