The synchronized and volatile modifiers
The synchronized and volatile modifiers
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Synchronized modifier:-The synchronized modifier is used in multithreaded programming to control access to critical sections in the program.
Volatile modifier:-In java the volatile modifier only applies to instance variables just like the transient modifier.
The variables declared volatile are subject to asynchronous modifications.
Synchronized modifier
The synchronized modifier is used in multithreaded programming to control access to critical sections in the program.The synchronized keyword used to indicate that a method can be accessed by only one thread at a time.
The synchronized keyword used to indicate that a method can be accessed by only one thread at a time. The synchronized modifier is generally used mainly in threading environment.
Volatile modifier
In java the volatile modifier only applies to instance variables just like the transient modifier.
The variables declared volatile are subject to asynchronous modifications. Thus we can say that,
declaring a variable volatile tells the compiler that this variable might be changed unexpectedly by other part of the program.
Synchronized Syntax
public synchronized void showDetails() // any of the four modifiers are used with synchronized .
{
.......
}
Volatile Syntax
public static final int VOLATILE
{
.......
}
//The int value representing the volatile modifier.
VOLATILE MODIFIER
public class MyRunnable implements Runnable
{
private volatile boolean active; // declaring volatile variable
public void run()
{
active = true;
while (active) // line 1
{
// some code here
}
}
public void stop()
{
active = false; // line 2
}
}
Synchronized modifier
public synchronized void showDetails()
{
.......// some code written here
}
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