The start() method of the Thread class is invoked to cause an object to begin executing asa separate thread.

Sandhya.Kishan

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• Jul 13th, 2012

The start() method is invoked to cause an object to begin executing as a separate thread.

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navneet

• Apr 12th, 2007

The subclasses of TextComponent class is TextField & TextArea

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Commas are used to separate multiple statements within the initialization and iterationparts of a for statement.

jimmy514in

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• 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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An abstract method is a method whose implementation is deferred to a subclass.

Sandhya.Kishan

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• 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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The high-level thread states are ready, running, waiting, and dead.

Sandhya.Kishan

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• 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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The read() method returns -1 when it has reached the end of a file.

gerald.amalraj

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• Dec 16th, 2007

It returns null value if its a char type and -1 if its a byte type.

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No, an object cannot be cast to a primitive value.

fcasttro

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• Mar 22nd, 2008

Ys its possibleByte b = new Byte("28"); double dd = b.doubleValue();

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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

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• 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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It is referred to as the modulo or remainder operator. It returns the remainder of dividingthe first operand by the second operand.

sujatham

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• 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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The Frame class extends Window to define a main application window that can have amenu bar.

pardeep16d

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• 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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The Object class is extended by all other classes.

Sandhya.Kishan

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• 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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A reachable object cannot be garbage collected. Only unreachable objects may begarbage collected..

sujatham

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• Jul 29th, 2007

No. An object cannot be garbage?collected?when it is reachable.

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The FontMetrics class is used to define implementation-specific properties, such asascent and descent, of a Font object.

Sandhya.Kishan

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• 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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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

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• 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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The Reader/Writer class hierarchy is character-oriented, and theInputStream/OutputStream class hierarchy is byte-oriented.

Sandhya.Kishan

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• May 7th, 2012

Character-oriented hierarchy is supported by reader/writer class where as byte-oriented hierarchy is supported by
InputStream/OutputStream class.

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A class that is declared without any access modifiers is said to have package access. Thismeans that the class can only be accessed by other classes and interfaces that are definedwithin the same package.

Chielo

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• Apr 10th, 2007

If a class declared without an access modifier,It will have what called a Default access, and can be access by members in the package.It is worthwhile to note the difference between the Default and Protected modifier as it can be confusing 

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The SimpleTimeZone class provides support for a Gregorian calendar.

Sandhya.Kishan

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• Mar 24th, 2012

Time zone that is use with a Gregorian calendar is a subclass of TimeZone which represented by SampleTimeZone class.By using the base time zone offset from GMT time zone ID and rules, for starting and ending the time of daylight we create SampleTimeZone class.

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The Map interface replaces the JDK 1.1 Dictionary class and is used associate keys withvalues.

Prabhas270

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• Jul 5th, 2008

Hi There, Map is one of the datastuctures provided by Sun.Map is an interface ,it is not extending from Collection interface as like List,Set,Queue does.There are 4 Classes which are implemented ...

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The only statements for which it makes sense to use a label are those statements that canenclose a break or continue statement.

sharmawithu

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• Aug 27th, 2011

A label is used to recognize particular area where we need to keep the break. Example: Suppose in one area you are expecting an exception then you'll keep the break then after that particular functi...

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The purpose of the System class is to provide access to system resources.

Sandhya.Kishan

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• Mar 27th, 2012

The purpose is that it provide access to externally defined properties and environment variables.It is used to read the system properties.

By using this class we can read time, and date, current running process,current Runtime.

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