ant build gives package does not exist error

Question

I am using ant build function on linux to compile a java program. I have three java files and I'm trying to import them to my main.java file but I get an error saying

/home/ggaz1/Ser321/Assigns/Assign2/src/main.java:4 error: package Assign2.src does not exist 

here is the build.xml file. the path to it is

/home/ggaz1/Ser321/Assigns/Assign2

<?xml version="1.0"?>
<project name="Movie Library."
         default="targets" basedir="."
         xmlns:dn="antlib:org.apache.ant.dotnet"
         xmlns="antlib:org.apache.tools.ant"
         xmlns:cpptasks="antlib:net.sf.antcontrib.cpptasks">

   <property name="src.dir" value="src"/>
   <property name="build" value="classes"/>
   <property environment="env"/>
   <property name="user" value="${env.USERNAME}"/>

   <target name="targets">
      <echo message="Targets are clean, prepare, build, execute, and targets"/>
   </target>

   <path id="compile.classpath">
      <pathelement location="${build}"/>
   </path>

   <target name="prepare">
      <mkdir dir="${build}" />
   </target>

   <target name="clean">
      <delete dir="${build}" failonerror="false"/>
   </target>

   <target name="build" depends="prepare">
      <javac srcdir="${src.dir}"
             includeantruntime="false"
             destdir="${build}">
        <src path="src"/>
         <classpath refid="compile.classpath"/>
      </javac>
   </target>

   <target name="execute.java" depends="build"
           description="Run the program">
         <echo message="command line execute: java -cp classes main, MovieDescription, MovieLibrary" />
         <java classname="main" fork="yes">
           <classpath refid="compile.classpath"/>
         </java>
   </target>
</project>

thanks in advance

Answer 1

You actually don't have any packages. All your Java source code files are located in the src folder. The src folder is the root of your packages. If you want a package assign2 you have to create a folder in src called assign2 and you should place all Java files which belong to the assign2 package into that folder.

Assuming your Main class itself is without a package and your classes MovieDescription and MovieLibrary are in package assign2 .

Then your file layout should look like:

--src
   |
   +---- Main.java
   |
   +---- assign2
            |
            +---- MovieDescription.java
            |
            +---- MovieLibrary.java

Then Main.java doesn't have any package declarartion.

Im MovieDescription.java and MovieLibrary.java the package declaration should be:

package assign2;
[...]

And the imports in Main.java look like:

import assign2.MovieLibrary;
import assign2.MovieDescription;

Maybe you should have a look at the Oracle Java Tutorial, Lesson: Packages .

And according to the Java naming conventions you should use only names starting with lower case letters for packages and variables. Classes should start always with an upper case letter.