101. What is the
purpose of the System class?
The purpose of
the System class is to provide access to system resources.
102. Which
TextComponent method is used to set a TextComponent to the read-only state?
setEditable()
103. How are the
elements of a CardLayout organized?
The elements of a
CardLayout are stacked, one on top of the other, like a deck of cards.
104. Is
&&= a valid Java operator?
No, it is not.
105. Name the
eight primitive Java types.
The eight
primitive types are byte, char, short, int, long, float, double, and boolean.
106. Which class
should you use to obtain design information about an object?
The Class class
is used to obtain information about an object's design.
107. What is the
relationship between clipping and repainting?
When a window is
repainted by the AWT painting thread, it sets the clipping regions to the area
of the window that requires repainting.
108. Is
"abc" a primitive value?
The String
literal "abc" is not a primitive value. It is a String object.
109. What is the
relationship between an event-listener interface and an
event-adapter
class?
An event-listener
interface defines the methods that must be implemented by an event handler for
a particular kind of event. An event adapter provides a default implementation
of an event-listener interface.
110. What
restrictions are placed on the values of each case of a switch statement?
During
compilation, the values of each case of a switch statement must evaluate to a
value that can be promoted to an int value.
111. What
modifiers may be used with an interface declaration?
An interface may
be declared as public or abstract.
112. Is a class a
subclass of itself?
A class is a
subclass of itself.
113. What is the
highest-level event class of the event-delegation model?
The java.util.EventObject
class is the highest-level class in the event-delegation class hierarchy.
114. What event
results from the clicking of a button?
The ActionEvent
event is generated as the result of the clicking of a button.
115. How can a
GUI component handle its own events?
A component can
handle its own events by implementing the required event-listener interface and
adding itself as its own event listener.
116. What is the
difference between a while statement and a do statement?
A while statement
checks at the beginning of a loop to see whether the next loop iteration should
occur. A do statement checks at the end of a loop to see whether the next
iteration of a loop should occur. The do statement will always execute the body
of a loop at least once.
117. How are the
elements of a GridBagLayout organized?
The elements of a
GridBagLayout are organized according to a grid. However, the elements are of
different sizes and may occupy more than one row or column of the grid. In
addition, the rows and columns may have different sizes.
118. What
advantage do Java's layout managers provide over traditional windowing systems?
Java uses layout
managers to lay out components in a consistent manner across all windowing
platforms. Since Java's layout managers aren't tied to absolute sizing and
positioning, they are able to accomodate platform-specific differences among
windowing systems.
119. What is the
Collection interface?
The Collection
interface provides support for the implementation of a mathematical bag - an
unordered collection of objects that may contain duplicates.
120. What
modifiers can be used with a local inner class?
A local inner class may be final or abstract.
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