When it comes to combat tactics, BioWare isn’t very descriptive other than saying, “…the Knight is capable of achieving extraordinary feats.” Really? I never could have guessed.

But seriously, the Knight is clearly a melee combat class which will likely include some amount of minor ranged attacks.

From SWTOR.com:

For thousands of years the Knights of the Jedi Order have been the guardians of peace and justice in The Old Republic. Through disciplined training and meditation, the Jedi Knights achieve perfect union of body and mind, allowing them to meet any situation with focused, fearless attention. Strengthened by the Force, they are able to turn this training into brilliant displays of lightsaber combat inspiring allies and disheartening those who would see the Republic fall.

See Also:

• MMO News – Jedi Knight, Defender
• Crispy Gamer – Jedi Knights
• Overly Positive – Excellently Expected