问题:How many objects are eligible for garbage collection once
execution has reached the line
labeled Line A?
String name;
String newName = "Nick";
newName = "Jason";
name = "Frieda";
String newestName = name;
name = null;
//Line A
A. 0
B. 1
C. 2
D. 3
E. 4
我觉得是C
回答：我认为答案是D
String newName = "Nick";
newName = "Jason"; "Nick"不再使用，可以回收
name = "Frieda";
String newestName = name;
newestName 此时为"frida",失去了对"Jason";的使用
name = null;置为空，可以回收  | 
