In what Albert King described as "a nice coincidence," the New Jersey Nets used two of their first three picks in the first round of the NBA draft yesterday to select Maryland's Buck Williams and King.

Williams, listed at 6 feet 8 and a center Maryland, was the third player chosen overall. King, a 6-6 forward, was New Jersey's second choice and the 10th player selected.

"If Williams had gone one or two, we would have taken King," Net Coach Larry Brown said after the team had also announced that Indiana center Ray Tolbert was their third first-round pick. "Needless to say, we're all pretty surprised and happy. We went for size and strength after watching the playoffs."

As expected, the Dallas Mavericks used their No. 1 pick in the draft to take De Paul's all-American, Mark Aguirre. Detroit, picking second, selected Indiana's superb point guard, Isiah Thomas.

The only other Washington-area player picked in the first round was Jeff Lamp, Virginia's all-America guard, who was Portland's first selection and the 15th player chosen overall.

Washington-area players taken in the first four rounds included Tracy Jackson, formerly of Paint Branch High School and Notre Dame, who was Boston's second-round pick and the 25th player selected overall. Claude (Little Stretch) Gregory, formerly of Coolidge High School and Wisconsin was one of Washington's three second-round choices and the 41st player selected.

Russell (Boo) Bowers, American University's all-time leading scorer, was Cleveland's third-round choice and its second pick in the draft. He was the 59th player selected overall Maryland's Ernest Graham, the 68th player picked, was the third-round choice of Philadelphia and Virginia's Lee Raker was a fourth-round pick of San Diego, the 77th player selected.

Larry Spriggs, a 6-7 forward from Howard, was taken in the fourth round by Houston. Spriggs, the 81st player taken, is only the second Howard player ever drafted. Gerald Glover was a fifth-round draft pick by Atlanta in 1978, but did not make the team.

Altanta made a last-minute deal with Chicago Monday, exchanging its sixth pick for the Bulls' fourth, which it used to get North Carolina forward Al Wood.

The Celtics raised a few eyebrows when they took Danny Ainge, 6-5 all-America guard from Brigham Young, in the second round. He is under a three-year Toronto Blue Jay contract that prohibits him from negotiating for a pro basketball contract. Ainge is hitting .181.

Williams and King said they were elated to remain teammates and to join two other ACC players, Mike Gminski and Mike O'Koren, with the Nets. However, Maryland Coach Lefty Driesell was disappointed that they weren't picked higher.

"I just hope I can help the Nets," said Williams, who knows he was chosen for his rebounding prowess. "Rebounding is my game and I take pride in it."

Other Washington area players selected yesterday included Mike Pepper of Flint Hill and North Carolina (San Diego, sixth); Jo Jo Hunter of Mackin and Colorado (Milwaukee, sixth); Greg Nance of Dunbar and West Virginia (Detroit, seventh); Greg Manning of Maryland (Denver, seventh); Lewis Lattimore of Virginia (Milwaukee, seventh); Mike Frazier of Georgetown (Atlanta, 10th) and Kenny Matthews of Dunbar and N.C. State (Boston, 10th).

In the ninth round the Golden State Warriors picked 7-foot-8, 303-pound Chibi Okayama of Osaka University.