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What is the difference between a MenuItem and a CheckboxMenuItem
The CheckboxMenuItem class extends the MenuItem class to support a menu item thatmay be checked or unchecked.
Ashwinshenoy7
- May 9th, 2011
For understanding purpose,Menu Item and check box menu items could be considered as classes.Menu item is a parent class, check box menu item is a sub class(child class) that inherits from the menu ite...
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Can an anonymous class be declared as implementing an interface and extending aclass
An anonymous class may implement an interface or extend a superclass, but may not bedeclared to do both.
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Name three subclasses of the Component class.Box.Filler, Button, Canvas, Checkbox, Choice, Container, Label, List, Scrollbar, orTextComponent
jimmy514in
- Jul 5th, 2010
Directly known subclasses of component: Button Canvas Checkbox Choice Container Label List Scrollbar TextComponent
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What is the GregorianCalendar class
The GregorianCalendar provides support for traditional Western calendars.
Sandhya.Kishan
- Mar 27th, 2012
GregorianCalendar is a concrete implementation of a Calendar for Gregorian calendar.Traditional Western calendars are supported by the GregorianCalender.It has two standard eras BC and AD.Only the current era recognizes the implementation of this calender class.
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Which Container method is used to cause a container to be laid out and redisplayed
Validate()
Sandhya.Kishan
- Jul 13th, 2012
Validate() method is used to cause a container to be laid out and redisplayed in java programming.
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What method is invoked to cause an object to begin executing as a separate thread
The start() method of the Thread class is invoked to cause an object to begin executing asa separate thread.
Sandhya.Kishan
- Jul 13th, 2012
The start() method is invoked to cause an object to begin executing as a separate thread.
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How are commas used in the intialization and iteration parts of a for statement
Commas are used to separate multiple statements within the initialization and iterationparts of a for statement.
jimmy514in
- Jul 5th, 2010
For initialization of x and y integersfor(int x=10,y=20;x<100;x++,y--){//the loop to be executed}
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What is an abstract method
An abstract method is a method whose implementation is deferred to a subclass.
Sandhya.Kishan
- Mar 27th, 2012
Method which is define in the class without implementation is call as Abstract Method. Abstract Method must be define with abstract keywords.
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What are the high-level thread states
The high-level thread states are ready, running, waiting, and dead.
Sandhya.Kishan
- Mar 27th, 2012
The thread states are 1.Ready state-This state signifies that the thread is ready for execution. 2.Running state-A thread in running state has access to the CPU i.e.,the thread is being executed. 3.Wa...
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What value does read() return when it has reached the end of a file
The read() method returns -1 when it has reached the end of a file.
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Can a Byte object be cast to a double value
No, an object cannot be cast to a primitive value.
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What is the difference between a static and a non-static inner class
A non-static inner class may have object instances that are associated with instances ofthe class's outer class. A static inner class does not have any object instances.
dapatel
- Jul 4th, 2011
A non-static inner class may have object instances that are associated with instances of the class's outer class. A static inner class does not have any object instances.
Dhananjay Singh
- Sep 12th, 2005
The static inner classes can be accessed with out creating it's objects or we can access static inner classes with direct class name but in the case of non-static inner classes access we have to create the object of that class.
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What is the % operator
It is referred to as the modulo or remainder operator. It returns the remainder of dividingthe first operand by the second operand.
sujatham
- Jul 29th, 2007
1.For integer remainder operation, where only integer operands are involved, evaluation of the expression (x % y) always satisfies the following relation:x == (x / y) * y...
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What is the difference between a Window and a Frame
The Frame class extends Window to define a main application window that can have amenu bar.
pardeep16d
- Nov 28th, 2007
Frame can be part of the window but window can not part of the frame. like e.g. when you will create frames with the help of HTML at that time you see many frames in a one window but we can't make a window in frame so we can say fram is a part of window.i think so ........
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Which class is extended by all other classes
The Object class is extended by all other classes.
Sandhya.Kishan
- Mar 24th, 2012
The object class is the super class of every class and it is extended by all the other classes.
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Can an object be garbage collected while it is still reachable
A reachable object cannot be garbage collected. Only unreachable objects may begarbage collected..
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What is the difference between the Font and FontMetrics classes
The FontMetrics class is used to define implementation-specific properties, such asascent and descent, of a Font object.
Sandhya.Kishan
- Mar 24th, 2012
Font class is used to set or retrieve the screen fonts.The Font class maps the characters of the language to their respective glyphs. The FontMetrics class defines a font metrics object, which encapsu...
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What happens when a thread cannot acquire a lock on an object
If a thread attempts to execute a synchronized method or synchronized statement and isunable to acquire an object's lock, it enters the waiting state until the lock becomesavailable.
acevedogalan
- Feb 25th, 2011
It goes to blocked state as it can not continue.but the cpu scheduler will wake him up once in a while .every time he wakes up he will try to get the lock again until he can finally get it.if he never...
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