When a Java object becomes unreachable to the program, then
it is subjected to garbage collection. The main use of
garbage collection is to identify and discard objects that
are no longer needed by a program so that their resources
can be reclaimed and reused.
When an object is no longer referred to by any
variable,java automatically reclaims memory used by that
object.This is known as garbage collection.
System.gc() method may be used to call it explicitly.
Hi...
GarbageCollector: Whenever an object is no longer used in
the program at that time the garbage collector reclaims the
memory of an object.It is controlled by the JVM ,The JVM
runs periadically by using "mark" and "sweep"algorithms.
Instead of "destructor" in c++ , java supports garbage
collector.
garbage collecton in java means, if a particular object in
a program is not being refered since long time then it will
be automatically deleted with the help of garbage collector
so that some amount of memory is saved.we can explicitily
call it by adding a method system.gc()in the program.so in
this case there is no need to use'destructor'to destroy the
objects.
When an object has of no use in a program then it has to be
discarded to free the occupied space by it so that other
object can fill the space.That is what Garbaghe collection
is.
when we remove the object that it will be stored particular
memory space these are known as garbage collection.
It is finalize method is used in the garbage collection.
garbage collection is process run thruogh out the java
programe ,when we class creation takes place after that we
have to instantiate that class ,if we can not gives refrence
to this object then that will be find out by garbage
collector and that will collect by garbage collector.
when an object in memory is no longer refered by a variable,
the garbage collector automatically move it to garbage
collection.
instead of calling destructor JVM do it automatically, as we
use destructor in c++ to destroy the object.
Garbage collection is a thread, that runs to reclaim the
memory by destroying objects which object is cannot be
referenced anymore.
Deleting Dynamically created objects from the memory.
Finalize method used to achieve garbage collection.
By using Runtime.gc() or System.gc() the object will be
garbage collected.
10. class Nav{
11. public enum Direction { NORTH, SOUTH, EAST, WEST }
12. }
13. public class Sprite{
14. // insert code here
15. }
Which code, inserted at line 14, allows the Sprite class to
compile?
a)Direction d = NORTH;
b)Nav.Direction d = NORTH;
c)Direction d = Direction.NORTH;
d)Nav.Direction d = Nav.Direction.NORTH;
why we import both packages java.awt.*; and java.awt.event.*;
as java.awt.*; can import all classes na. then what is the
need of importing java.awt.event.*; ?
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