boolean variable getting method keywords

[Jingxian Zhou]

If a java bean had a boolean variable named tankFull, how would you provide getters and setters for it ?
A.public boolean isTankFull(){return tankFull;}public void setTankFull(boolean tabkFull){this.tankFull = tabkFull;}
B.public boolean getTankFull(){return tankFull;}public void setTankFull(boolean tabkFull){this.tankFull = tabkFull;}
C.public boolean getTankFull(boolean tankFull){return tankFull;}public void setTankFull(boolean tabkFull){this.tankFull = tabkFull;}
D.public boolean gettankFull(){return tankFull;}public void settankFull(boolean tabkFull){this.tankFull = tabkFull;}
E.None of the above   

Answer:A,
Explanation :
The correct option is a java bean naming standard

I selected A and B。
Why B is not the correct answer?

Thanks!


PS:
This question quoted from CertPal SCJP1.6 Moke Exam

[Christophe Verré]

Please QuoteYourSources. Where does this question come from ? If it's a book, which book. If it's a mock, which mock.

[Christophe Verré]

If the question is about JavaBeans (it looks like it), the convention for boolean getters is to name them "isXXXX", not "getXXXX".

From the JavaBeans spec:
8.3.2 Boolean properties

In addition, for boolean properties, we allow a getter method to match the pattern:

public boolean is<PropertyName>();

This "is<PropertyName>" method may be provided instead of a "get<PropertyName>" method, or it may be provided in addition to a "get<PropertyName>" method. In either case, if the "is<PropertyName>" method is present for a boolean property then we will
use the "is<PropertyName>" method to read the property value. An example boolean property might be:

public boolean isMarsupial();
public void setMarsupial(boolean m);

[Jingxian Zhou]

 If the property is not a boolean, the getter method's prefix must be get. For
example, getSize()is a valid JavaBeans getter name for a property named
"size." Keep in mind that you do not need to have a variable named size
8 Chapter 1: Declarations and Access Control
(although some IDEs expect it). The name of the property is inferred from the
getters and setters, not through any variables in your class. What you return
from getSize() is up to you.
■ If the property is a boolean, the getter method's prefix is either get or is. For
example, getStopped() or isStopped() are both valid JavaBeans names for
a boolean property.   

Above quote from SCJP Study Guide(Exam 310-065)


So,I think B maybe correct

[Jingxian Zhou]

Christophe Verré wrote:Please QuoteYourSources. Where does this question come from ? If it's a book, which book. If it's a mock, which mock.

First,thank you for reply.

Er..I hope you do not reply this every time.

[Christophe Verré]

One day I'll learn to read what I post The specification says "This "is<PropertyName>" method may be provided instead of a "get<PropertyName>" method", so answer B looks right too.

Er..I hope you do not reply this every time.

As long as you quote your sources

[Jingxian Zhou]

Christophe Verré wrote:One day I'll learn to read what I post The specification says "This "is<PropertyName>" method may be provided instead of a "get<PropertyName>" method", so answer B looks right too.

Er..I hope you do not reply this every time.

As long as you quote your sources

Thanks a lot!

This question quoted from CertPal SCJP1.6 Moke Exam

I explained quote。。。