用package组织源文件时如何编译、运行(欢迎补充)

package com.yourcompany.serial;
class Client
{
    public static void main(String[] args) 
    {
         System.out.println("Client Hello World!");
    }
}

package com.yourcompany.serial;
import com.yourcompany.util.DispDate;
class Server
{
  public static void main(String[] args) 
  {
    new Client();//Server和Client属于同一个包，所以不需要导入。
    new DispDate().disp();//Server和DispDate不属于同一个包，要导入
    System.out.println("Hello World!");
  }
}

package com.yourcompany.util;
import java.util.Date;
public class DispDate 
{
  public void disp() 
  {
    System.out.println(new Date());
  }
}

<project name="jdbc" basedir="." default="run">
    <property name="src" location="src"/>
    <property name="classes" location="classes"/>
    <property name="src.serial" location="${src}/com/yourcomapny/serial"/>
  <property name="src.util" location="${src}/com/yourcomapny/util"/>
    <path id="classpath">     
        <pathelement path="classes"/>
    </path>
  <target name="init">
  <mkdir dir="${classes}"/>
  </target>
    <target name="compile" depends="init">     
        <javac destdir="${classes}"
            fork="false"
            verbose="off" 
            debug="on"
            source="1.5">
            <classpath refid="classpath"/>
          <src path="${src.serial}"/>
          <src path="${src.util}"/>
      </javac>
    </target>
    <target name="run" depends="compile">
      <input message="请输入要运行的类名（包括包名）" addproperty="run.class"/>
        <java fork="true" classname="${run.class}" classpathref="classpath">
        </java> 
  <antcall target="clean"/>
    </target>   
    <target name="clean">
        <delete dir="${classes}"/>
    </target>
</project>

   <src path="${src.serial}"/>          
   <src path="${src.util}"/>

   <src path="${src}"/>