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Can a for statement loop indefinitely
Yes, a for statement can loop indefinitely. For example, consider the following:for(;;) ;
Sandhya.Kishan
- Apr 24th, 2012
For(i=0::)
{
}
Tis is an example where the for loop runs indefinitely. -
What is the immediate superclass of the Applet class
Panel
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What are wrapped classes
Wrapped classes are classes that allow primitive types to be accessed as objects.
Sandhya.Kishan
- Apr 24th, 2012
Wrapped class is a private class defined with other class.The values once assigned in this class cannot be changed.It converts value of one data typr to other data type.
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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 operandby the second operand.
Sandhya.Kishan
- Apr 23rd, 2012
It is a reminder operator.
if r = x % y, then a non-negative q exist, such that
x = q*y + r.
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What is the relationship between the Canvas class and the Graphics class
A Canvas object provides access to a Graphics object via its paint() method.
Sandhya.Kishan
- Apr 23rd, 2012
The graphics class object can be accessed by the paint() method which is provided by the canvas class object.
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What is the range of the char type
The range of the char type is 0 to 2^16 - 1.
sunny
- Apr 22nd, 2012
In java char define with 2 byte not 1 byte i. e. 0 to 65536
Sandhya.Kishan
- Apr 14th, 2012
The char data type ranges from 128 to 127 and it requires 1 byte to store a particular character.
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Which Java operator is right associative
The = operator is right associative.
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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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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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To what value is a variable of the String type automatically initialized
The default value of an String type is null.
Sandhya.Kishan
- Apr 20th, 2012
Null value is the default value to which the string type is automatically initilised.
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Name two subclasses of the TextComponent class
TextField and TextArea
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What are the high-level thread states
The high-level thread states are ready, running, waiting, and dead.
Sandhya.Kishan
- Apr 18th, 2012
The high level states of a thread are ready state,running state,waiting state and dead state.
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What is an abstract method
An abstract method is a method whose implementation is deferred to a subclass.
Sandhya.Kishan
- Apr 18th, 2012
A method which has method declaration and definition but no method body is known as an abstract method i.e it is a method without any implementation(without braces, and followed by a semicolon),
abstract void add(int X, int Y);
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How do u ping in java
jan.cajthaml
- Apr 14th, 2012
Its quite simple. You need to do this two steps. First send Packet with seq=0 ack=0 flag=1 and data 1 Then wait until the server confirms you this packet, that mean wait until you receive the packet...
me
- Feb 5th, 2007
Ping is based on ICMP. Java has no support for this. They have UDP and TCP sockets. In Java 5 there is an isAlive call that says if a host is alive or not, but is not a ping. You could do the same...
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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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Which class is the immediate superclass of the MenuComponent class
Object
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What is the immediate superclass of Menu
MenuItem
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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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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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What class is the top of the AWT event hierarchy
The java.awt.AWTEvent class is the highest-level class in the AWT event-classhierarchy.
Sandhya.Kishan
- Apr 14th, 2012
The AWT event hierarchy is
java.lang.object ----> java.util.Eventobject ----> java.awt.AWTevent ----> java.awt.event.Hierarchyevent.
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