Awk's answer may probably work, but for some reason, it's not working for me. Then i found this (a bit different) answer by Googling.
1. Download “bin” Release from <
2. Extract & copy/move the whole folder (apache-ant-1.9xxxxx) into `/opt/`. So there will be `/opt/apache-ant-1.9xxxxxx/`
3. Make a Symlink: `ln -s /opt/apache-ant-1.9.xxxxx /opt/ant`
4. Make another Symlink: `ln -s /opt/ant/bin/ant /usr/bin/ant`
5. Set `ANT_HOME` into the Environment `vi /etc/environment` and add this line: `ANT_HOME=/opt/ant` _(without trailing slash)_
6. Re-login to initiate the Environment.
That one perfectly works for me.