synchronized Questions
1
Solved
How does one go about synchronizing a method across JVM's?
My example is a web application that restricts a user name from being logged in more than once (in other words, the first user can log on...
Feeney asked 15/10, 2013 at 20:2
2
Solved
After reading a bunch of questions / articles on this topic there is still one thing unclear to me.
From what I understand (and please correct me if I'm wrong) is that the value of a variable can ...
Subtorrid asked 26/9, 2013 at 14:11
1
Solved
Trying to visualize and understand synchronization.
What are the differences between using a static lock object (code A) and a non-static lock object (code B) for a synchronized block?
How does...
Puma asked 21/8, 2013 at 11:58
6
this is a passage from JavaDoc regarding ConcurrentHashMap. It says retrieval operations generally do not block, so may overlap with update operations. Does this mean the get() method is not thread...
Gastronomy asked 19/2, 2013 at 0:18
2
Solved
I was reading the JVM specification to try to figure out how to properly handle monitors. The example they give in the relevant section looks like this:
0 aload_1 // Push f
1 dup // Duplicate it o...
Erogenous asked 15/8, 2013 at 9:30
3
Solved
When a Java member needs to be thread-safe, we do like the following:
public synchronized void func() {
...
}
This syntax equivalent to:
public void func() {
synchronized(this) {
.....
Painkiller asked 16/7, 2013 at 5:46
1
Solved
Sometimes I wrote the following code to synchronized a routine:
@synchronized(objToBeSync){ .... }
When two threads try to access the sync block at the same time, one will block the others, unti...
Kandicekandinsky asked 1/7, 2013 at 3:10
3
Solved
I am still pretty new to the concept of threading, and try to understand more about it. Recently, I came across a blog post on What Volatile Means in Java by Jeremy Manson, where he writes:
Whe...
Protozoan asked 14/6, 2013 at 12:30
4
In Java, if a synchronized method contains a call to a non-synchronized, can another method still access the non-synchronized method at the same time? Basically what I'm asking is everything in the...
Goosegog asked 1/3, 2012 at 23:34
3
Solved
I have a UIViewController and a Category for adding methods to the UIViewController. There is a method in the category:
@implementation UIViewController (AlertAnimationsAndModalViews)
-(void)someAd...
Flick asked 23/5, 2013 at 8:4
3
Solved
I have superclass Point and a synchronized method draw(). Will the subclasses of Point inherit synchronized if I override method draw() in them or I have to always write it?
Lex asked 14/4, 2013 at 11:3
2
Solved
If i create a new thread inside a synchronized block, will the block remain locked till the thread execution is also complete?
If not, then till when would it remain locked?
String sLine;
onClick...
Fasciation asked 10/4, 2013 at 12:52
3
Solved
I read some java code, and found these functions:
synchronized void setConnected(boolean connected){
this.connected = connected;
}
synchronized boolean isConnected(){
return connected;
}
I wo...
Celebration asked 5/4, 2013 at 7:20
2
Since c is already synchronzied collection, and it's thus thread safe. But why do we have to use synchronized(c) again for the iteration? Really confused. Thanks.
" It is imperative that the user ...
Facelift asked 3/4, 2013 at 20:57
2
Solved
When we use synchronized keyword in java, which synchronization primitive is used exactly? Lock, Semaphore, Monitor, Mutex ?
EDIT : How JVM implements the lock at the native level ?
Grugru asked 28/3, 2013 at 14:31
3
Is there a synchronized Queue class in Java? I'm looking for something like Vector (which is synchronized) vs ArrayList (which is not), but instead of implementing the List interface, I'm loo...
Celio asked 17/3, 2013 at 12:40
6
I asked here a question about iterating over a Vector, and I have been answered with some good solutions. But I read about another simpler way to do it. I would like to know if it is good solution....
Naturalist asked 15/3, 2013 at 17:48
3
I'm using Vector instead of ArrayList to make a list safe in multi-threaded enviroment. But I keep getting ConcurrentModificationException when I trying to add items to the Vector while itera...
Quennie asked 15/3, 2013 at 16:44
2
Solved
Let's say I have a synchronized method on some class:
abstract class Foo {
public synchronized void foo() { // synchronized!
// ...
};
}
and I overrode it without using the synchronized modif...
Maxinemaxiskirt asked 12/3, 2013 at 23:53
2
Solved
Why doesn't the code below lead to a deadlock? I mean after i call getNumber(.) the object of the class Test should be locked, so I shouldn't be able to access getNumber2(.).
class Test() {
...
Godspeed asked 4/3, 2013 at 14:34
1
Solved
Looking at the Java Virtual Machine Specification and compiled code tells us how "synchronized" blocks are implemented in java. The following code:
public void testSync()
{
Object obj = getSomeOb...
Unloose asked 27/2, 2013 at 20:10
6
Solved
This article talks about Java's "synchronized" keyword.
...
private int foo;
public synchronized int getFoo() { return foo; }
public synchronized void setFoo(int f) { foo = f; }
If a caller...
Calcine asked 27/2, 2013 at 17:50
2
Solved
Part of porting a Java application to C# is to implement a synchronized message buffer in C#. By synchronized I mean that it should be safe for threads to write and read messages to and from it.
I...
Brisbane asked 22/2, 2013 at 15:28
3
Solved
In putting together a simple "Clock" application I discovered that Android requires you to use android.os.Handler that lives in Thread A in order to update View objects in Thread A with the results...
Docila asked 4/3, 2011 at 18:58
3
I have two threads. The first thread calls the setX method, the second one calls the getX method. Do I have to set the methods synchronized although i have only one writing thread? And can i also s...
Oder asked 28/1, 2013 at 19:39
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