Comment 4 for bug 908679

I had the same problem:
$ freemind
[warning] /usr/bin/freemind: No java runtime was found
[error] /usr/bin/freemind: Unable to find an appropriate java runtime. See java_wrappers(7) for help

It turned out, that $JAVA_HOME was not set.

For my Java-Installation (Sun), the following command worked to set the $JAVA_HOME variable:

$ JAVA_HOME=/opt/java/32/jre1.6.0_30/
$ export JAVA_HOME

To make this setting static, you might use the following command:

$ sudo bash -c "echo JAVA_HOME=/opt/java/32/jre1.6.0_30/ >> /etc/environment"