class Car implements Serializable { }  <br /> class Ford extends Car { }  <br /> 如果试图序列化一个Ford实例,结果为()  
A、编译失败
B、一个对象被序列化
C、两个对象被序列化
D、运行时异常被抛出
A、编译失败
B、一个对象被序列化
C、两个对象被序列化
D、运行时异常被抛出
A、 0, 0,0 B、 150, 60, 0 C、 Compilation fails. D、 150, 150, 150 E、 An exception is thrown at runtime.
A、public void HH{…} B、public class Move(){…} C、public class void number{} D、public class Car{…}
A、 insert a call to this() in the Car constructor B、 insert a call to this() in the MeGo constructor C、 insert a call to super() in the MeGo constructor D、 insert a call to super(vin) in the MeGo constructor E、 change the wheelCount variable in Car to protected F、 change line 3 in the MeGo class to super.wheelCount = 3;
A、A. Jar A B、B. Jar B C、C. Jar C D、D. Jar D E、E. Jar E
A、class Widget{Sprocket s;};class Gadget extends Widget{Spring s;} B、class Widget{};class Gadget extends Widget{Spring s1; Sprocket s2;} C、class Widget{Sprocket s1; Spring s2;};class Gadget extends Widget{} D、class Gadget{Spring s;};class Widget extends Gadget{Sprocket s;} E、class Gadget{};class Widget extends Gadget{Sprocket s1; Spring s2;} F、class Gadget{Spring s1; Sprocket s2;};class Widget extends Gadget{}
A、 Compilation of both classes will fail. B、 Compilation of both classes will succeed. C、 Compilation of class a will fail. Compilation of class b will succeed. D、 Compilation of class a will fail. Compilation of class a will succeed.
A、insert a call to this() in the Car constructor B、insert a call to this() in the MeGo constructor C、insert a call to super() in the MeGo constructor D、insert a call to super(vin) in the MeGo constructor E、change the wheelCount variable in Car to protected F、change line 3 in the MeGo class to super.wheelCount=3
A、 class A { public A(int x) {} } B、 class A {} class B extends A { B() {} } C、 class A { A() {} } class B { public B() {} } D、 class Z { public Z(int) {} } class A extends Z {}