Section 3.4.4 of the spec says:
Threads returned by the newThread() method must implement the ManageableThread interface.

but javadoc says:
Threads returned from the newThread() method should implement the ManageableThread interface.

The spec is correct. The javadoc needs to be updated to say
Threads returned from the newThread() method must implement the ManageableThread interface.

Affected Versions

[1.0]