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When a thread is created and started, what is its initial state
A thread is in the ready state after it has been created and started.
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Can an anonymous class be declared as implementing an interface andextending a class
An anonymous class may implement an interface or extend a superclass, but may not bedeclared to doboth.
Sandhya.Kishan
- May 11th, 2012
An anonymous class simultaneously cannot be declared as implementing an interface and extending a class but it may implement an interface or extend a superclass.
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What is the range of the short type
The range of the short type is -(2^15) to 2^15 - 1.
Sandhya.Kishan
- Apr 14th, 2012
The range of short data type is 32,768 to 32,767 and it uses 2 bytes to store a particular value or a number.
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What is the immediate superclass of Menu
MenuItem
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What is the purpose of finalization
The purpose of finalization is to give an unreachable object the opportunity to performany cleanupprocessing before the object is garbage collected.
Sandhya.Kishan
- Jul 24th, 2012
The purpose of finalization is to provide opportunity to an object which is unreachable to perform any cleanup process . This activity is done before the object is garbage collected.Finalization is used to invoke finalized() method
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Which class is the immediate superclass of the MenuComponent class
Object
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What invokes a thread's run() method
After a thread is started, via its start() method or that of the Thread class, the JVMinvokes the thread'srun() method when the thread is initially executed.
Sandhya.Kishan
- May 11th, 2012
A thread starts its process by invoking the start() method, this start() method invokes the run() method.
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Name three subclasses of the Component class
Box.Filler, Button, Canvas, Checkbox, Choice, Container, Label, List, Scrollbar, orTextComponent
Sandhya.Kishan
- Apr 14th, 2012
The three subclasses of component classes are Canvas class,panel class and applet class.
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What is the GregorianCalendar class
The GregorianCalendar provides support for traditional Western calendars.
Sandhya.Kishan
- Apr 24th, 2012
The GregorianCalendar class is a standard calendar which is supported by java.It contains constructors like GregorianCalendar() representing the moment it was created, the GregorianCalendar(int year, ...
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Which Container method is used to cause a container to be laid out andredisplayed
Validate()
Sandhya.Kishan
- Apr 20th, 2012
The Validate() method is used to cause a container to be laid out anderdisplay.
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What is the purpose of the Runtime class
The purpose of the Runtime class is to provide access to the Java runtime system.
Sandhya.Kishan
- Jun 2nd, 2012
The runtime class provides access to the java runtime system, it provides runtime information memory availability, invoking the garbage collector.It provides facilities such as Reading data through key board,Running non-java programs from within a java application etc.
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How many times may an object's finalize() method be invoked by the garbagecollector
An object's finalize() method may only be invoked once by the garbage collector.
Sandhya.Kishan
- Apr 20th, 2012
Only once the garbage collector can invoke the objects finalize() method.
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What is the purpose of the finally clause of a try-catch-finally statement
The finally clause is used to provide the capability to execute code no matter whether ornot an exception isthrown or caught.
Sandhya.Kishan
- Jul 24th, 2012
The purpose is that,when an exception is caught during program execution,code written in finally clause will be executed ,irrespective of what type of error has occurred.
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What is the argument type of a program's main() method
A program's main() method takes an argument of the String[] type.
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Which Java operator is right associative
The = operator is right associative.
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Can a double value be cast to a byte
Yes, a double value can be cast to a byte.
Sandhya.Kishan
- May 11th, 2012
Any data type can be typecasted to any other data type and hence we can type cast a double value to a byte.
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What must a class do to implement an interface
It must provide all of the methods in the interface and identify the interface in itsimplements clause.
Sandhya.Kishan
- Jul 23rd, 2012
A class should provides the definition to all the methods declared in the interface to implement an interface.
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What method is invoked to cause an object to begin executing as a separatethread
The start() method of the Thread class is invoked to cause an object to begin executing asa separate thread.
Sandhya.Kishan
- Jun 2nd, 2012
To cause an object to begin executing as a separate thread we should invoke the start() method present in the thread class.
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Name two subclasses of the TextComponent class
TextField and TextArea
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Which containers may have a MenuBar
Frame
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