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  • Some more multitasking java issues

    - by owca
    I had a task to write simple game simulating two players picking up 1-3 matches one after another until the pile is gone. I managed to do it for computer choosing random value of matches but now I'd like to go further and allow humans to play the game. Here's what I already have : http://paste.pocoo.org/show/200660/ Class Player is a computer player, and PlayerMan should be human being. Problem is, that thread of PlayerMan should wait until proper value of matches is given but I cannot make it work this way. When I type the values it sometimes catches them and decrease amount of matches but that's not exactly what I was up to :) Logics is : I check the value of current player. If it corresponds to this of the thread currently active I use scanner to catch the amount of matches. Else I wait one second (I know it's kinda harsh solution, but I have no other idea how to do it). Class Shared keeps the value of current player, and also amount of matches. By the way, is there any way I can make Player and Shared attributes private instead of public and still make the code work ? CONSOLE and INPUT-DIALOG is just for choosing way of inserting values. class PlayerMan extends Player{ static final int CONSOLE=0; static final int INPUT_DIALOG=1; private int input; public PlayerMan(String name, Shared data, int c){ super(name, data); input = c; } @Override public void run(){ Scanner scanner = new Scanner(System.in); int n = 0; System.out.println("Matches on table: "+data.matchesAmount); System.out.println("which: "+data.which); System.out.println("number: "+number); while(data.matchesAmount != 0){ if(number == data.which){ System.out.println("Choose amount of matches (from 1 to 3): "); n = scanner.nextInt(); if(data.matchesAmount == 1){ System.out.println("There's only 1 match left !"); while(n != 1){ n = scanner.nextInt(); } } else{ do{ n = scanner.nextInt(); } while(n <= 1 && n >= 3); } data.matchesAmount = data.matchesAmount - n; System.out.println(" "+ name+" takes "+n+" matches."); if(number != 0){ data.which = 0; } else{ data.which = 1; } } else{ try { Thread.sleep(1000); } catch(InterruptedException exc) { System.out.println("End of thread."); return; } } System.out.println("Matches on table: "+data.matchesAmount); } if(data.matchesAmount == 0){ System.out.println("Winner is player: "+name); stop(); } } }

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  • how to flush the console buffer?

    - by DoronS
    Hi all, i have some code that run repetedly : printf("do you want to continue? Y/N: \n"); keepplaying = getchar(); in the next my code is running it doesnt wait for input. i found out that getchar in the seconed time use '\n' as the charcter. im gussing this is due to some buffer the sdio has, so it save the last input which was "Y\n" or "N\n". my Q is, how do i flush the buffer before using the getchar, which will make getchar wait for my answer?

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  • javascript to jquery

    - by Angeline Aarthi
    How do I write the following line which is in javascript in jQuery? var variablename = new functionname('some variable'); This is my js code: var rt = new ResizeableTextbox('myRT'); I need to use this in the following code segment: if($(this).text() =='String') { $("<label id=labelstr"+stringinc+" >"+label+"</label>").appendTo(".menu li"); $("<input id=inputstr"+stringinc+" type= 'text' ></input>").appendTo(".menu li"); //in place of this I need that javascript code. } How do I do that? The function Resizeable is defined in a separate js file. Please help me out.

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  • prototype/javascript - firefox not firing keypress/keydown event unless focus is in textbox

    - by Chloraphil
    The following works fine on IE6, IE7, and chrome. Not working on ff 3.0.7. <html><head> <script src="prototype.js" type="text/javascript" ></script> <script type="text/javascript"> Event.observe(window, 'load', function(){ Event.observe(document.body, 'keydown', myEventHandler); alert('window load'); }); function myEventHandler(evt) { alert(evt); } </script> </head> <body > <input type="text" /><br><br> </body></html> EDIT: By "not working" I mean myEventHandler is not firing in firefox. EDIT2: Furthermore, it works fine when focus is on the input element. I want it fire for all keydowns.

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  • Simple number-to-number (or number-to-hex) encryption algorithm that minimizes # of characters

    - by Clay Nichols
    I need to encrypt a number and I and this encrypted value will be given to a customer ask a key so I want to minimize the number of digits and make them all printable. So I'd like the result to be either all number or all Hex characters. The current encryption method I'm using (for non numbers) converts the characters to hex (2 hex digits each). That doubles the number of characters. I also considered just treating the input as hex (so each pair of numbers is treated as a Hex pair, but then you have ambiguity between an input of 0123 and 123 (when decrypting that leading '0' is lost. Any suggestions?

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  • Program execution stop at scanf???

    - by Mohit Deshpande
    main.c (with all the headers like stdio, stdlib, etc): int main() { int input; while(1) { printf("\n"); printf("\n1. Add new node"); printf("\n2. Delete existing node"); printf("\n3. Print all data"); printf("\n4. Exit"); printf("Enter your option -> "); scanf("%d", &input); string key = ""; string tempKey = ""; string tempValue = ""; Node newNode; Node temp; switch (input) { case 1: printf("\nEnter a key: "); scanf("%s", tempKey); printf("\nEnter a value: "); scanf("%s", tempValue); //execution ternimates here newNode.key = tempKey; newNode.value = tempValue; AddNode(newNode); break; case 2: printf("\nEnter the key of the node: "); scanf("%s", key); temp = GetNode(key); DeleteNode(temp); break; case 3: printf("\n"); PrintAllNodes(); break; case 4: exit(0); break; default: printf("\nWrong option chosen!\n"); break; } } return 0; } storage.h: #ifndef DATABASEIO_H_ #define DATABASEIO_H_ //typedefs typedef char *string; /* * main struct with key, value, * and pointer to next struct * Also typedefs Node and NodePtr */ typedef struct Node { string key; string value; struct Node *next; } Node, *NodePtr; //Function Prototypes void AddNode(Node node); void DeleteNode(Node node); Node GetNode(string key); void PrintAllNodes(); #endif /* DATABASEIO_H_ */ I am using Eclipse CDT, and when I enter 1, then I enter a key. Then the console says . I used gdb and got this error: Program received signal SIGSEGV, Segmentation fault. 0x00177024 in _IO_vfscanf () from /lib/tls/i686/cmov/libc.so.6 Any ideas why?

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  • How to make Asynchronous(AJAX) File Upload using iframe ?

    - by BugKiller
    Hi, I'm trying to make ajax file upload . I read that it is not possible to do that without using iframe . I wrote : <iframe id="uploadTrg" name="uploadTrg" height="0" width="0" frameborder="0" scrolling="yes"></iframe> <form id="myForm" action="file-component" method="post" enctype="multipart/form-data" target="uploadTrg"> File: <input type="file" name="file"> <input type="submit" value="Submit" id="submitBtn"/> </form> and using jquery form plugin : $('#myForm').ajaxForm({ dataType: 'json', success: function(data){ alert(data.toSource()); } }); The Result : the file is uploaded successfully and I can see the uploaded file , but a dialog box appears : since I send back a json result to display the file name + size etc .. My Question : How can I use the iFrame to be able to make " ajax file upload".

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  • Providing updating suggestions list with javascript, php and ajax

    - by user1104854
    I'm trying to modify this example on making a live updating list to integrate it with my API. So, instead of using GET on the page with the form, I'd like to send it to that page via a function call. So, here's my form // message.php //function to display the hint sent from gethint.php function message_hint($hint){ echo $hint; } //displays the form for sending messages function send_message_form($to_user,$title,$message){ include 'gethint.php'; ?> <table> <form name = "send_message" method="post"> <td>Send A Message</td> <tr><td>To:</td><td><input type = "text" size="50" name="to_user" id = "to_user" value ="<? echo $to_user; ?>" onkeyup="showHint(this.value)"></td></tr> <tr><td>Title:</td><td><input type = "text" size="50" name="message_title"></td></tr> <tr><td>Message:</td><td><textarea rows="4" cols="50" name="message_details"></textarea></td></tr> <tr><td><input type="submit" name="submit_message"></td></tr> </table> </form> <? } Here's the head of message.php <head> <script> function showHint(str){ var to_user = document.getElementById("to_user").value //to_user is the id of the textbox if (str.length==0){ to_user.innerHTML=""; return; } if (window.XMLHttpRequest){// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); }else{// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function(){ if (xmlhttp.readyState==4 && xmlhttp.status==200){ alert(to_user) //properly displays the name via alert box to_user.innerHTML=xmlhttp.responseText; } } xmlhttp.open("GET","gethint.php?q="+to_user,true); xmlhttp.send(); } </script> </head> The page gethint.php is exactly the same, aside from this at the bottom. //echo $response //this was the original output $message = new messages; $message->message_hint($response);

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  • how i got the name of the string variable in the strange attempt to debug unknown variable ?

    - by justjoe
    i got several variable. One is variable string, object, and array. $mystring = "hello im input"; $myobject = new userclass; $myarray = array ( 0 = 'zero', 1 = "one"); i want to create a new array with its variable name as key before send it to as function parameter with it's first line use extract function. the multi_array will be like this multi_array = array ( 'mystring' = "hello im input", 'myobject' = new userclass, 'myarray' = array ( 0 = 'zero', 1 = "one") ) i use key to get the name of array and getclass to get the name of object. But how i got the name of the string variable ? function i_do_extract($multi_array) { extract($multi_array); // Do Rest }

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  • How would I best address this object type heirachy? Some kind of enum heirarchy?

    - by FerretallicA
    I'm curious as to any solutions out there for addressing object heirarchies in an ORM approach (in this instance, using Entity Framework 4). I'm working through some docs on EF4 and trying to apply it to a simple inventory tracking program. The possible types for inventory to fall into are as follows: INVENTORY ITEM TYPES: Hardware PC Desktop Server Laptop Accessory Input (keyboards, scanners etc) Output (monitors, printers etc) Storage (USB sticks, tape drives etc) Communication (network cards, routers etc) Software What recommendations are there for handling enums in a situation like this? Are enums even the solution? I don't really want to have a ridiculously normalised database for such a relatively simple experiment (eg tables for InventoryType, InventorySubtype, InventoryTypeToSubtype etc). I don't really want to over-complicate my data model with each subtype being inherited even though no additional properties or methods are included (except PC types which would ideally have associated accessories and software but that's probably out of scope here). It feels like there should be a really simple, elegant solution to this but I can't put my finger on it. Any assistance or input appreciated!

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  • How can I extract URLs from plain text with Perl?

    - by Russell C.
    I need the Perl regex to parse plain text input and convert all links to valid HTML HREF links. I've tried 10 different versions I found on the web but none of them seen to work correctly. I also tested other solutions posted on StackOverflow, none of which seem to work. The correct solution should be able to find any URL in the plain text input and convert it to: <a href="$1">$1</a> Some cases other regular expressions I tried didn't handle correctly include: URLs at the end of a line which are followed by returns URLs that included question marks URLs that start with 'https' I'm hoping that another Perl guy out there will already have a regular expression they are using for this that they can share. Thanks in advance for your help!

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  • Cross domain form submit does not work on Chrome and IE

    - by Debiprasad
    I am having an unexpected issue while submitting a from. The action of the form is a different domain. And the method is get. Here to the code of the from: <div style="width: 100%; background-color: #09334D; margin: 0 0 15px 0; padding: 10px; -webkit-border-radius: 5px; -moz-border-radius: 5px; border-radius: 5px;" <form action="http://www.flipkart.com/search-book" method="get"> <a href="http://www.flipkart.com/?affid=debiprasad"> <img alt="Flipkart.com" style="vertical-align:middle" src="http://static.fkcdn.com/www/270/images/flipkart_india.png" /> </a> <input type="hidden" name="affid" value="debiprasad"> <input type="text" name="query" style="height:25px; width: 400px; font-size: 16px;"> <select onchange="$(this).closest('form').attr('action', 'http://www.flipkart.com/search-' + $(this).val());" style="height:25px; width: 150px; font-size: 16px;"> <option value='book' selected>Books</option> <option value='music'>Music</option> <option value='movie'>Movies & TV</option> <option value='game'>Games</option> <option value='mobile'>Mobiles</option> </select> <input type="submit" value="Search" style="height:25px; width: 100px; font-size: 16px; background: url('http://static.fkcdn.com/www/270/images/fkart/search_button_bg.png') repeat-x scroll 0 0 transparent; border: 1px solid #915A13; color: #3C2911; cursor: pointer; font-family: 'lucida grande',tahoma,verdana,arial,sans-serif; font-weight: bold; padding: 0 17px 0 15px; margin: 0; -webkit-border-radius: 5px; -moz-border-radius: 5px; border-radius: 5px;"> </form> The form is located at: http://wheretobuyonline.in/ When I click on the "Search" (submit) button, it does not submit. This problem happens in Chrome and IE (8). But works without any problem on Firefox.

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  • Printing an array in a method, from a different class?

    - by O.Lodhi
    Hello All, I'm a fairly inexperienced programmer, and i'm currently working on a Console Application project. It's basically a little 'mathematics game'; the application generates two random numbers, that have either been added, subtracted, multiplied or divided against each other randomly. The answer is shown on screen and the user has to pick from the menu which is the right mathematical operator, once the correct answer is picked the application then displays on screen how long it took for the user in milliseconds to input the correct answer. Now I want to save the times of the players in an array that can be called up later with all the scores. I need to include a method in this programme and I figured a method to save the times into an array would be suitable. I seem to have stumbled across a little problem though. I'm not quite sure what's wrong: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Mathgame { class Program { } class arrayclass { public static void saveInArray(int duration) { int[] TopTenScores = {000,1000,2000,3000,4000,5000,6000,7000,8000,9000}; if (duration < 1000) { duration = TopTenScores[000]; } else if ((duration >= 1000) && (duration <= 1999)) { duration = TopTenScores[1000]; } else if ((duration >= 2000) && (duration <= 2999)) { duration = TopTenScores[2000]; } else if ((duration >= 3000) && (duration <= 3999)) { duration = TopTenScores[3000]; } else if ((duration >= 4000) && (duration <= 4999)) { duration = TopTenScores[4000]; } else if ((duration >= 5000) && (duration <= 5999)) { duration = TopTenScores[5000]; } else if ((duration >= 6000) && (duration <= 6999)) { duration = TopTenScores[6000]; } else if ((duration >= 7000) && (duration <= 7999)) { duration = TopTenScores[7000]; } else if ((duration >= 8000) && (duration <= 8999)) { duration = TopTenScores[8000]; } else if ((duration >= 9000) && (duration <= 9999)) { duration = TopTenScores[9000]; } Console.WriteLine(TopTenScores); } static void Main(string[] args) { int intInput, num1, num2, incorrect, array1; float answer; string input; System.Random randNum = new System.Random(); Console.WriteLine("Welcome to the Maths game!"); Console.WriteLine("(Apologies for the glitchiness!)"); Console.WriteLine(); Console.WriteLine("Please choose from the following options:"); Console.WriteLine(); retry: Console.WriteLine("1 - Test your Maths against the clock!"); Console.WriteLine("2 - Exit the application."); Console.WriteLine("3 - Top scores"); Console.WriteLine(); input = Console.ReadLine(); intInput = int.Parse(input); if (intInput == 1) { goto start; } else if (intInput == 2) { goto fin; } else if (intInput == 3) { array1 = array1.saveInArray; goto retry; } Now, in the last 'else if' statement in the code, you can see my variable array1 trying to call the method, but no matter what I do I keep getting errors. This is the only error I have at the moment, but I have a feeling soon as I resolve that error, another will come up. For now i'm just determined to get past this error: 'int' does not contain a definition for 'saveInArray' and no extension method 'saveInArray' accepting a first argument of type 'int' could be found (are you missing a using directive or an assembly reference?). Any help would be kindly appreciated, apologies in advanced for my ugly written code! And thank you to any help that I receive! Regards, Omar.

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  • iPhone UIWebView becomeFirstResponder

    - by user505618
    I have an UIWebView with an <input type="text"/> html element in it. I want to focus the input element in the html and show the keyboard on the iPhone programmatically, without tapping the screen. I've tried the following: set the focus from JavaScript (in this case the onFocus JS event will fire but the keyboard won't show up) [webView becomeFirstresponder] (returns NO) set the first subview of the webView to be the firstResponder (returns NO) subclass UIWebView to return YES to canBecomeFirstResponder: (nothing happens) I'm trying to find the solution since yesterday but I couldn't find it. Please help.

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  • Problem with PHP 'PHP_SELF'

    - by shinjuo
    I am having a bit of trouble. It does not seem to be a big deal, but I have created a page that the user can edit a MySQL database. Once they click submit it should process the php within the if statement and echo 1 record updated. The problem is that it does not wait to echo the statement. It just seems to ignore the way I wrote my if and display the whole page. Can anyone see where I went wrong. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> </head> <body> <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post"> <?php require("serverInfo.php"); ?> <?php $res = mysql_query("SELECT * FROM cardLists order by cardID") or die(mysql_error()); echo "<select name = 'Cards'>"; while($row=mysql_fetch_assoc($res)) { echo "<option value=\"$row[cardID]\">$row[cardID]</option>"; } echo "</select>"; ?> Amount to Add: <input type="text" name="Add" /> <input type="submit" /> </form> <?php if(isset($_POST['submit'])); { require("serverInfo.php"); mysql_query("UPDATE `cardLists` SET `AmountLeft` = `AmountLeft` + ".mysql_real_escape_string($_POST['Add'])." WHERE `cardID` = '".mysql_real_escape_string($_POST['Cards'])."'"); mysql_close($link); echo "1 record Updated"; } ?> <br /> <a href="index.php"> <input type="submit" name="main" id="main" value="Return To Main" /></a> </body> </html>

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  • combine two GCC compiled .o object files into a third .o file

    - by ~lucian.grijincu
    How does one combine two GCC compiled .o object files into a third .o file? $ gcc -c a.c -o a.o $ gcc -c b.c -o b.o $ ??? a.o b.o -o c.o $ gcc c.o other.o -o executable If you have access to the source files the -combine GCC flag will merge the source files before compilation: $ gcc -c -combine a.c b.c -o c.o However this only works for source files, and GCC does not accept .o files as input for this command. Normally, linking .o files does not work properly, as you cannot use the output of the linker as input for it. The result is a shared library and is not linked statically into the resulting executable. $ gcc -shared a.o b.o -o c.o $ gcc c.o other.o -o executable $ ./executable ./executable: error while loading shared libraries: c.o: cannot open shared object file: No such file or directory $ file c.o c.o: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked, not stripped $ file a.o a.o: ELF 32-bit LSB relocatable, Intel 80386, version 1 (SYSV), not stripped

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  • Finding the order of method calls in Eclipse

    - by Chathuranga Chandrasekara
    Suppose I have a big program that consists of hundreds of methods in it. And according to the nature of input the program flow is getting changed. Think I want to make a change to the original flow. And it is big hassle to find call hierarchy/ references and understand the flow. Do I have any solution for this within Eclipse? Or a plugin? As an example, I just need a Log of method names that is in order of time. Then I don't need to worry about the methods that are not relevant with my "given input" Update : Using debug mode in eclipse or adding print messages are not feasible. The program is sooooo big. :)

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  • May the FileInputStream.available foolish me?

    - by Tom Brito
    This FileInputStream.available() javadoc says: Returns an estimate of the number of remaining bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream. The next invocation might be the same thread or another thread. A single read or skip of this many bytes will not block, but may read or skip fewer bytes. In some cases, a non-blocking read (or skip) may appear to be blocked when it is merely slow, for example when reading large files over slow networks. I'm not sure if in this check: if (new FileInputStream(xmlFile).available() == 0) can I rely that empty files will always return zero?

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  • Converting 24BPP to 4BPP with GDI+ in VB.NET

    - by Chris
    My VB.NET program currently takes a 4BPP TIFF as an Bitmap, converts it to a Graphic, adds some text strings and then saves it out again as a TIFF file. The output Bitmap.Save() TIFF file by default seems to be 24BPP (regardless of the input) and is a lot larger than the original TIFF. Is it possible to keep the same 4BPP palette encoding as the input for the output and if not, how can I convert my Bitmap PixelFormat from 24BPP to 4BPP Indexed. I've seen an example for converting 24 BPP to 1 BPP at http://www.bobpowell.net/onebit.htm using BitmapData.Lockbits() but cannot figure out how to do it for 4BPP. Many thanks Chris

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  • How to automate MS Outlook

    - by Omer Akhter
    I have to generate an email at end of the day (daily-status) which is templated. I have add tasks to different list and on the top, I have to have count of these tasks such as: X Tasks: 2 of 5 Y Tasks: 3 of 5 X Tasks: X Task 1 X Task 2 Y Tasks: Y Task 1 Y Task 2 Y Task 3 I don't want write code in .NET etc. Is there anyway to script outlook to update numbers above when I change the list contents automatically. Or even better, if an input box can take input for each list contents and generate the email

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  • jQuery dialog width resizing problem

    - by ktMen
    I try to load some HTML code into a jQueryUI dialog by AJAX. The code itself is a list, where rightmost elements should be absolutely positioned so that the list looks like a table with two columns, but only in some rows. The problem is that jQueryUI plugin does not seem to be correctly resizing the dialog's width, which I think is due to the absolute positioning of some li's. I have read some answers to other similar questions, but none helped me out with this. This is the code I load: <style type="text/css"> ul {list-style-type:none;margin:0px;padding:0px;} ul ul {margin:0px;padding:0px;} ul>li.fila {margin-bottom:5px;padding-bottom:5px;} ul li.fila ul li { display:inline; padding-left:20px; position:relative; margin-bottom:10px; } ul li.fila ul li.O { background:url(bullet.gif) 5px 8px no-repeat; list-style-position:inside; } </style> <ul id="raiz" > <li class="fila"> <ul > <li style="position:absolute;left:0px;" class="O"> <label for="col1">Col1:</label> <input type="text" name="col1" id="col1" value="vCol1" class="text ui-widget-content ui-corner-all" /> </li> <li style="left:250px;" class="O" > <label for="col2">Col2:</label> <input type="text" name="col2" id="col2" value="vCol2" class="text ui-widget-content ui-corner-all" /> </li> </ul> </li> <li class="fila"> <ul > <li> <label for="col3">Col3:</label> <input type="text" name="col3" id="col3" value="vCol3" class="text ui-widget-content ui-corner-all" /> </li> </ul> </li> </ul> And the Dialog constructor: $("#dialog").dialog({ bgiframe: true, autoOpen: false, height: 'auto', width: 'auto', modal: true, buttons:{ 'Cancel': function() { $(this).dialog('close'); } }, open: function(event,ui){ $("#dialog").load("dialogCode.html"); } }); Thanks in advance for any suggestions.

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  • Django CSRF failure when form posts to a different frame

    - by Leopd
    I'm building a page where I want to have a form that posts to an iframe on the same page. The Template looks like this: <form action="form-results" method="post" target="resultspane" > {% csrf_token %} <input name="query"> <input type=submit> </form> <iframe src="form-results" name="resultspane" width="100%" height="70%"> </iframe> The view behind form-results is getting CSRF errors. Is there something special needed for cross-frame posting?

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  • Correct way to Convert 16bit PCM Wave data to float

    - by fredley
    I have a wave file in 16bit PCM form. I've got the raw data in a byte[] and a method for extracting samples, and I need them in float format, i.e. a float[] to do a Fourier Transform. Here's my code, does this look right? I'm working on Android so javax.sound.sampled etc. is not available. private static short getSample(byte[] buffer, int position) { return (short) (((buffer[position + 1] & 0xff) << 8) | (buffer[position] & 0xff)); } ... float[] samples = new float[samplesLength]; for (int i = 0;i<input.length/2;i+=2){ samples[i/2] = (float)getSample(input,i) / (float)Short.MAX_VALUE; }

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  • Problem with istringstream in C++

    - by helixed
    Hello, I'm sure I'm just doing something stupid here, but I can't quite figure out what it is. When I try to run this code: #include <iostream> #include <string> #include <sstream> using namespace std; int main(int argc, char *argv[]) { string s("hello"); istringstream input(s, istringstream::in); string s2; input >> s2; cout << s; } I get this error: malloc: *** error for object 0x100016200: pointer being freed was not allocated *** set a breakpoint in malloc_error_break to debug The only thing I can think of is that I allocated s2 on the stack, but I thought strings manage their own content on the heap. Any help here would be appreciated. Thanks, helixed

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  • Can ASM method-visitors be used with interfaces?

    - by Olaf Mertens
    I need to write a tool that lists the classes that call methods of specified interfaces. It will be used as part of the build process of a large java application consisting of many modules. The goal is to automatically document the dependencies between certain java modules. I found several tools for dependency analysis, but they don't work on the method level, just for packages or jars. Finally I found ASM, that seems to do what I need. The following code prints the method dependencies of all class files in a given directory: import java.io.*; import java.util.*; import org.objectweb.asm.ClassReader; public class Test { public static void main(String[] args) throws Exception { File dir = new File(args[0]); List<File> classFiles = new LinkedList<File>(); findClassFiles(classFiles, dir); for (File classFile : classFiles) { InputStream input = new FileInputStream(classFile); new ClassReader(input).accept(new MyClassVisitor(), 0); input.close(); } } private static void findClassFiles(List<File> list, File dir) { for (File file : dir.listFiles()) { if (file.isDirectory()) { findClassFiles(list, file); } else if (file.getName().endsWith(".class")) { list.add(file); } } } } import org.objectweb.asm.MethodVisitor; import org.objectweb.asm.commons.EmptyVisitor; public class MyClassVisitor extends EmptyVisitor { private String className; @Override public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) { this.className = name; } @Override public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) { System.out.println(className + "." + name); return new MyMethodVisitor(); } } import org.objectweb.asm.commons.EmptyVisitor; public class MyMethodVisitor extends EmptyVisitor { @Override public void visitMethodInsn(int opcode, String owner, String name, String desc) { String key = owner + "." + name; System.out.println(" " + key); } } The Problem: The code works for regular classes only! If the class file contains an interface, visitMethod is called, but not visitMethodInsn. I don't get any info about the callers of interface methods. Any ideas?

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