Ant : As Build Tool :: Ant with Java Application

• Ant with java Application
• Examples

We’ll construct a “Calculator” program and use Ant to build and assemble it for execution and distribution. We’ll have two Java classes and a properties file involved just to make it slightly more interesting, and we’ll end up with an executable Java Archive (JAR) file that is ready to run.

In this example, We have following files as below.

F:\antExample\Example2\
            +-- build.xml
            +-- src\ 
                 +-- Calculator.java 
                 +-- TestDrive.java                     

The .java files will need to be compiled and placed in the proper package directory hierarchy. The .class files must be included in the executable JAR, and the MANIFEST.MF file must be used as the manifest for the executable JAR because it contains the magic to make a JAR execute. All four of these files must be included in a source distribution JAR file.

Create two .java file with following name in src folder

Calculator.java

package com.javaskool;

class Calculator
{
	public void Add(int a,int b)
	{
		System.out.println("Addition : "+(a+b));

	}
}

TestDrive.java

package com.javaskool;

class TestDrive 
{
	public static void main(String[] args) 
	{
		System.out.println("Ant Example");
		Calculator s1=new Calculator();
		s1.Add(45,89);

	}
}

build.xml

<?xml version="1.0"?>
<project name="firstJavaProject" default="jar">

<!--
* compile the java sources
* create a jar file
* execute
-->
<target name="clean">
	<delete dir="build/classes"/>
</target>

<target name="init" depends="clean">
	<mkdir dir="build/classes" />
</target>

<target name="compile" depends="init">
	<javac srcdir="src" destdir="build/classes" />
</target>

<target name="jar" depends="compile">
	<jar destfile="firstAntApp-1.0.jar" basedir="build/classes">
		<manifest>
			<attribute name="Main-Class" value="com.javaskool.TestDrive"/>
		</manifest>
	</jar>
</target>

</project>

Follow the screen commands for Output

<em>//build.xml and src folder in current directory as below</em>
F:\antExample\Example2>dir
 Volume in drive F is workspace
 Volume Serial Number is E846-4436

 Directory of F:\antExample\Example2

20-04-2014  17:06    <DIR>          .
20-04-2014  17:06    <DIR>          ..
20-04-2014  17:06               630 build.xml
20-04-2014  17:06    <DIR>          src
               1 File(s)            630 bytes
               3 Dir(s)   5,008,269,312 bytes free

<em>//Files in src folder</em>

F:\antExample\Example2>dir src
 Volume in drive F is workspace
 Volume Serial Number is E846-4436

 Directory of F:\antExample\Example2\src

20-04-2014  17:06    <DIR>          .
20-04-2014  17:06    <DIR>          ..
20-04-2014  17:02               135 Calculator.java
20-04-2014  17:03               193 TestDrive.java
               2 File(s)            328 bytes
               2 Dir(s)   5,008,265,216 bytes free

//Running ant , will automatically read build.xml

F:\antExample\Example2>ant
Buildfile: F:\antExample\Example2\build.xml

clean:

init:
    [mkdir] Created dir: F:\antExample\Example2\build\classes

compile:
    [javac] F:\antExample\Example2\build.xml:18: warning: 'includeantruntime' wa
s not set, defaulting to build.sysclasspath=last; set to false for repeatable bu
ilds
    [javac] Compiling 2 source files to F:\antExample\Example2\build\classes

jar:
      [jar] Building jar: F:\antExample\Example2\firstAntApp-1.0.jar

BUILD SUCCESSFUL
Total time: 7 seconds

F:\antExample\Example2>java -jar firstAntApp-1.0.jar
'java' is not recognized as an internal or external command,
operable program or batch file.

<em>//Setting Jdk path</em>
F:\antExample\Example2>set PATH=C:\Program Files\Java\jdk1.7.0_03\bin;.;

<em>//Executing java code using created jar file by ant.</em>
F:\antExample\Example2>java -jar firstAntApp-1.0.jar
Ant Example
Addition : 134

F:\antExample\Example2>