How to execute /bin/sh with commons-exec?

This is what I'm doing:

import org.apache.commons.exec.*;
String cmd = "/bin/sh -c \"echo test\"";
new DefaultExecutor().execute(CommandLine.parse(cmd));

This is the output:

/bin/sh: echo test: command not found

What am I doing wrong?

This one works for me:-

    CommandLine command = new CommandLine("/bin/sh");
    command.addArguments(new String[] {
            "-c",
            "echo 'test'"
    },false);
    new DefaultExecutor().execute(command);