Javamex

Java programming and performance

Discussion of medium to advanced level topics of Java programming, including Java performance.

Latest Activity

George Mourtasagas added a discussion
Find password with dictionary attack
I have 2 files , one zip file and one txt file. I want to find out the password of the zip file with the help of txt file.In txt file I have some words and one of them is the right password.The problem is here , when I put the right word at the firs…
on Sunday
George Mourtasagas is now a member of Javamex
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on Sunday
Magnus Eriksson replied to Sven Turnau's discussion 'Not blocking character input'
As far as I know there is no portable solution to this problem (some "consoles" do not even send the characters before you press CR)....
February 3
Magnus Eriksson updated their profile
February 3
Magnus Eriksson updated their profile photo
February 3
Magnus Eriksson replied to Ian Atha's discussion 'Clock cycles overhead of native methods'
The Java native call mechanism is sadly so slow (at least measured in clock-cycles!) that I very much doubt you can make this kind of measurements in a meaningful way from Java - i.e. just the variations in how fast all the "blumbing" execute will s…
February 3
Magnus Eriksson replied to Roman Romm's discussion 'Volatile arrays in Java'
Studying the description of volatile in the Java language spec you absolutely get the impression that "volatile" only apply to a single primitive value (int, boolean etc) and a pointer is of course a special case of this. From this one can assume th…
February 3
Magnus Eriksson replied to Cory's discussion 'Classmexer agent throwing illegalaccess error'
Yes this tool would be much more valuable (for instance as a learning tool) if the source where available. I am also curious what license these program have? Can I freely use it as part of a commercial application? What does "copyright" of a binary…
February 3
Magnus Eriksson is now a member of Javamex
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February 3
Guru Paladi is now a member of Javamex
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January 10
airell, aesctun and adalric joined Javamex
January 8
Malcom is now a member of Javamex
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January 3
Suzan is now a member of Javamex
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January 2
Ian Atha added a discussion
Clock cycles overhead of native methods
Greetings. In The overhead of native calls you measured the overhead involved in making a native call in clock cycles. I was wondering if you could talk a bit about how you measured that. Thank you very much, ian.
December 9, 2009
Ian Atha is now a member of Javamex
Welcome Them!
December 9, 2009
BianBian added a discussion
The volatile keyword in Java 5
I have read the stuff about this question in this website. But I'm still confused about the DCL(Double-Checked locked). I don't know how it works well after java 5. Here is the code of DCL: public class MyFactory { private static volatile MyFactory…
November 26, 2009
 

Forum

George Mourtasagas

Find password with dictionary attack

Started by George Mourtasagas in Java Performance Feb 7.

Sven Turnau

Not blocking character input 2 Replies

Started by Sven Turnau in Getting Started with Java. Last reply by Magnus Eriksson Feb 3.

Ian Atha

Clock cycles overhead of native methods 1 Reply

Started by Ian Atha in Java Performance. Last reply by Magnus Eriksson Feb 3.

Roman Romm

Volatile arrays in Java 2 Replies

Started by Roman Romm in Java Performance. Last reply by Magnus Eriksson Feb 3.

Cory

Classmexer agent throwing illegalaccess error 1 Reply

Started by Cory in Miscellaneous Java Topics. Last reply by Magnus Eriksson Feb 3.

BianBian

The volatile keyword in Java 5

Started by BianBian in Java Threading and Concurrency Nov. 26, 2009.

Michael R. Dunlavey

On thread profiling 2 Replies

Started by Michael R. Dunlavey in Java Performance. Last reply by Michael R. Dunlavey Nov. 24, 2009.

Günter

Classmexer gives wrong results 2 Replies

Started by Günter in Miscellaneous Java Topics. Last reply by Neil Coffey Nov. 3, 2009.

EDH

Concurrent Hashmap 3 Replies

Started by EDH in Collections, Data Structures and Algorithms. Last reply by EDH Oct. 27, 2009.

Nigel

PBE questions and clarifications

Started by Nigel in Java Cryptography Jul. 6, 2009.

 
 

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