-|-9|=-9,-(-3.15)=3.15,(1)整数集合{ 6,-3,-2,0,-1,-|-9|…}(2)分数集合{ 2.5,-(-3.15)…}(3)非负数集合{ 6,2.5,0,-(-3.15)…}.故答案为:{ 6,-3,-2,0,-1,-|-9|…};{ 2.5,-(-3.15)…};{ 6,2.5,0,-(-3.15)…}.