Hi all;
I am new to the ant and I used following java example and it worked,
when I used it with ant.
package oata;
public class HelloWorld{
public static void main(String[] args){
System.out.println("Hello Ant");
}
}

Build file is
<project>

<target name="clean">
<delete dir="build"/>
</target>

<target name="compile">
<mkdir dir="build/classes"/>
<javac srcdir="src" destdir="build/classes"/>
</target>

<target name="jar">
<mkdir dir="build/jar"/>
<jar destfile="build/jar/HelloWorld.jar" basedir="build/classes">
<manifest>
<attribute name="Main-Class" value="oata.HelloWorld"/>
</manifest>
</jar>
</target>

<target name="run">
<java jar="build/jar/HelloWorld.jar" fork="true"/>
</target>

</project>

(source: http://ant.apache.org/manual/tutorial-HelloWorldWithAnt.html)
I am using jdk1.5.0 and apache ant 1.6.2

But when it runs in the command prompt using following command, it gave
me following error messages.

E:\build\jar>java -jar HelloWorld.jar
Exception in thread "main" java.lang.UnsupportedClassVersionError:
oata/HelloWor
ld (Unsupported major.minor version 49.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)

Please help me to solve this problem
Thanks