From the javadocs:


"There are nine predefined |Class| objects to represent the eight
primitive types and void. These are created by the Java Virtual Machine,
and have the same names as the primitive types that they represent,
namely |boolean|, |byte|, |char|, |short|, |int|, |long|, |float|, and
|double|.

These objects may only be accessed via the following public static final
variables, and are the only |Class| objects for which this method
returns |true|."

Thus:

Boolean.TYPE.isPrimitive();

should return true.

All in all it seems rather useless to me.