Ant to implement Java compiler and run __java

 

Continue to learn ant today. For simplicity's sake, use ant to do a common trilogy of Java programs: writing, compiling, and running.

1 According to yesterday's learning results, to do a project should first plan the engineering structure. So first layout file structure: Src folder put source files, classes put the compiled files.
2. Write a simple source file Helloworld.java content is to print Hello world a few words then put in the SRC folder
3. Write Build.xml and place it on the same level directory as the SRC folder. The contents and comments of Build.xml are as follows:

<?xml version= "1.0" encoding= "UTF-8"?>
<project name= "HelloWorld" default= "Run" basedir= "." >

<property name= "src" value= "src"/>
<property name= "Dest" value= "Classes"/>

<!--initialization, create classes folders to prevent the compilation of good class files-->
<target name= "Init" >
<mkdir dir= "${dest}"/>
</target>

<!--compiled, Sredir indicates the original file directory, destdir indicate where to put the compiled. -->
<!--Note: Sredir does not use the indicated filename, I think the filename should default to the project name. -->
<!--denpends= "Init" means to run init this target--> first
<target name= "Compile" depends= "init" >
<javac srcdir= "${src}" destdir= "${dest}"/>
</target>

<!--running command is actually a Java command. Indicates the class name to run, and the path-->
<target name= "Run" depends= "compile" >
<java classname= "HelloWorld" classpath= "${dest}"/>
</target>

</project>

4. Enter the project directory, input ant command to complete the process of compiling to run. After modifying the source file, it is convenient to ant again directly.
so far, you've got an overview of Ant's Role and basic build process. More detailed in-depth knowledge in the future can be learned in the learning and practice and mastered.