单项选择题
A.what classes are instantiated from.
B.an instance of a class.
C.a blueprint for creating concrete realization of abstractions.
D.a reference to an attribute.
E.a variable.
单项选择题 Amethodis()
单项选择题 1. public class X { 2. public object m () { 3. object o = new float (3.14F); 4. object [] oa = new object [1]; 5. oa[0]= o; 6. o = null; 7. oa[0] = null; 10. return o; 9. } 10. } When is the float object created in line 3, eligible for garbage collection?()
多项选择题 public class MethodOver { private int x, y; private float z; public void setVar(int a, int b, float c){ x = a; y = b; z = c; } } Which two overload the setVar method?()