怎么配置J2EE tutorial 中的例子？

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Building the Examples
Most of the tutorial examples are distributed with a configuration file for asant, a portable build tool contained in the J2EE 1.4 Application Server, that is an extension of the Ant tool developed by the Apache Software Foundation (http://www.apache.org). asant contains additional tasks that interact with the J2EE 1.4 Application Server adminstration utility asadmin. Directions for building the examples are provided in each chapter.

In order to run the asant scripts, you must configure your environment and properties files as follows:

Add <JAVA_HOME>/bin to the front of your path.

Add <J2EE_HOME>/bin and <J2EE_HOME>/share/bin to the front of your path so that J2EE 1.4 Application Server scripts (asadmin, asant, deploytool, and wscompile) override other installations.
Set the j2ee.home property in the file<INSTALL>/j2eetutorial14/examples/common/build.properties to the location of your J2EE Application Server installation. The build process uses the j2ee.home property to include the J2EE library archive, <J2EE_HOME>/lib/j2ee.jar, in the classpath. If you wish to use an IDE or the javac compiler to build J2EE applications, you must add this JAR to your classpath.

我看不明白Set the j2ee.home property in the file<INSTALL>/j2eetutorial14/examples/common/build.properties
怎么配置j2ee.home property ？怎么打开build.properties 文件？？？