hi how can i Read The Title bar of any active window(like notepad ,mirosoft word ,internet explorer and so on......)who is runnning in windows Xp and close that window by pure java code not with the help of any programming language

Occasionally my Java application crashes with EXCEPTION_FLT_STACK_CHECK at ~SafepointBlob always in the same method. This method is called hundreds of times without any problems. The problem is not reproducible. This is my logfile:# EXCEPTION_FLT_STACK_CHECK (0xc0000092) at pc=0x01210c58, ...

am the beginner of JNI. I write a test program to use C code in JAVA.[yxz155@lionxo JAVAaC]$ lsAClassWithNativeMethods.java theNativeMethod.c[yxz155@lionxo JAVAaC]$ javac AClassWithNativeMethods.java[yxz155@lionxo JAVAaC]$ javah -jni AClassWithNativeMethods[yxz155@lionxo JAVAaC]$ ...

Hi guys,I experience "java.lang.RuntimeException: java.lang.OutOfMemoryError: Java heap space" exception while my Java code is executed under my JNI code.I'm stuck on the problem, what I have found - "Tenured Gen" reises all the time and that's why I have OOME. However within native java ...

I am trying to understand space usage by the hotspot JVM (build 1.5.0_07-b03). I'm using windows XP and so I'm using the 32 bit JVM. An int takes up 32 bits and a long takes up 64 bits. However my test program below always gives the same memory usage even when I change the Test object to ...

Hello!I made a Tablemodel in Java with native methods (getValueAt, ...)which are implemented in C/C++.My question is:How can I return a Integer, Double or Boolean object in the getValueAtmethod in C/C++, if the return type is a jobject?JNIEXPORT jobject JNICALL Java_JNITableModel_getValueAt ...

I need links, ebooks or other resources of using C++ in Java using JNI.regards!

I was wanting to know if sun offers a tool that you can download and run to check the compatibility of your system and it's components for an switch over to solaris 10. i am currenlty running windows xp and was wanting to make the switch, and wondered if there was a tool for that or if i ...

Can any body help?I am having the same problem. I am usingWindows XP Build 2600 Service Pack 2. It gives me following error msg.I am using native mathod in my application. This happens only on XP , with windows 2000 it works fine. I checked this lot of times. Can any body help?Thanks in ...

Can anybody provide native code to capture all keyboard and mouse event on the system ?

Hi,I was working on some application and used dynamically method loading using java.lan.reflect.Method package.But later on when i was going through this page (below is the link) http://java.sun.com/products/hotspot/docs/whitepaper/Java_Hotspot_v1.4.1/Java_HSpot_WP_v1.4.1_1002_4.htmlBottom of ...

Hi all,Im getting OutofMemory error in one of my applications.please can any one tell me how to increase the size of JVM Heap size programatically.waiting for ur response...Thanx in Advance... ...

hi!everyone!i have a C++ function like this:java_call_c::test()how do i write codes in java in order to call the function ?thanksa lot !!!

Compiling my simple source code reports error error: parse error before '.' . But in fact there is not any "." token on this line. At my guess it has something to do with JNI C macros but I really have no idea how to find that bug// ##net_java_dev_jssm_MulticastSSM.h: line 55JNIEXPORT void ...

HiI have a problem with our jvm and according to bug # 2141971it is fixed in jdk1.4.2_14 but cant find it can anyone let me know where can I download it.

Just installed Eclipse 3.2.1. I imported a project and built it with no problems.However, When I attempt to run it, I get this error in a dlg box:Can't connect to VMI am not trying to connect to a VM remotely. I don't think I have a firewall running. No message in the console#java -version ...

Hi,I have a JNI app that runs perfectly up to JRE 1.5_07, but crashes on JRE 1.6. After some debugging, I found out the reason for the crash was that the Java UI was received truncated strings from the C++ DLL.Again, when I run the app with JRE 1.5_07 or earlier, the strings are passed in full. ...

While trying to load native libraries I'm getting the following error messagejava.lang.UnsatisfiedLinkError: /XXX/XXX/libMySharedObj.so: ld.so.1: <JAVA_HOME>/bin/sparcv9/java: fatal: libskgxp10.so: open failed: No such file or directoryAt which place the 'libskgxp10.so' file should ...

Hi,during the MDB run in the application, we are getting the out of memory exception. when we enabled our GC logs. i have found that during the Full GC only i m getting the out of memory exception.Weblogic 8 sp5JDK 1.4.2_12heap size parameters are like this,-Xms=1024-Xmx=1024-XX:MaxPermSize=384 ...

Hi All,I have a class A in which I have a method m1() and a static method m2(). From m1() I invoke a native method nm1() passing refernce to the JNIEnv and other parameters. When there is a call to nm1(), the control goes to nm2 another native method. From nm2, I need to make a call back method ...

I'm just starting to learn JNI at the moment. I had this working fine just using javah to create a header file, but I'm trying to get away from that and use the RegisterNatives method from the JNI_OnLoad method.However, I've been banging away at errors for a while, but now I'm stuck. Any ...

What are different types of JVM

Please read my question in the Java Programming Forum about not being able to create the JVM again after destroying it: http://forum.java.sun.com/thread.jspa?threadID=5133663&tstart=0Thanks!

Hi Guys,I am working in a maintanance project. One of our application is showing out of memory error in every 3-5 days and crashes. It is running on tomcat which is set as a service. The current settings for for maximum heap is -Xmx512m, minimum is -Xms256m which sets at ...

We have an application written some years ago. The hosters, moving to a 2003 server found that the app times out while it's building a lookup table.According to them its the following bit of code that's responsible.Recordset donorIDs = null;try { donorIDs = objConn.execute("SELECT DonorID ...

Hi ,Can anyone help me with the default memory occupied by Jvm in different operating systems ? I have practically seen that jdk1.4,jdk1.5,jdk1.3 has around 64 Mb as thedefault size on 32 bit machines .I am in need of the similar data for jvms on Solaris,Unix and Linux machines . Also much ...

Hi,I'm wondering how the xmx memory is allocated on Windows systems. Does anyone know?I have the problem that using the JNI interface I can access a driver dll only when the xmx value is below ~200M, otherwise the driver produces an error. Now I will make a C++ application to test if I can ...

We moved our environment to linux(Weblogic) from solaris, from then onwards we were not able to get the applet loaded,JRE version 1.5.0._07, Can anyone give a solution to avoid this problemMessage was edited by: qrious_about_java

Hello, I need to avoid this happening. I have tried using-XX:+UseParallelGC and-XX:+UseConcMarkSweepGC .....with slightly differing results but at some point within the first 5 minutes of the application running, a 25 second full GC takes place that virtually halts the application.I am using a ...

This is yet another 'unload dll' topic.I badly need unload a dll. As adviced by many threads, i created custom classloader - once it is gc-ed it should unload it's native libs.Classloader works fine and is gc-ed fine - as long i do not call a method from dll.Once a dll method is called, the ...

With jdk 1.4.2_12, and maximum heap set to 2048M, I see the following message when the used heap exceeds 1024M :Exception java.lang.OutOfMemoryError: requested 32756 bytes for ChunkPool::allocate. Out of swap space?Any ideas as to what causes this ? Our solaris server has over 60GB of swap ...

I've been running into a problem in my program where it would crash if wehappened to call throwNew 2 times in a row (from different invocations ofa native method). I have been able to reproduce this in a very simple test case.basically I have code which does the following in Java:for (int i = ...

Hi all,I've a problem with building my native code in the free VC++ Express Edition. The build process ends up with the line:win32dirwatcher.obj : error LNK2001: Nicht aufgel鰏tes externes Symbol ""extern "C" long __stdcall JNI_GetCreatedJavaVMs(struct JavaVM_ * *,long,long *)" ...

Hello,Whenever I try to visit websites that have a java applet I get a dialogue with the following error:java.lang.ClassNotFoundException: loader.class.I have tried uninstalling/reinstalling java, and also adding the -xmx and -xms parameters for java applet runtime setting in control panel with ...

Hi,Our application is basically http proxy which is running in the jboss enviroment, from time to time, the java process cpu usage spikes to 99%, when this happen the application stops accepting any new connections, it is usually not possible to ask for a thread dump, and when it is possible it ...

Hello, I tried to search during hours, without success, to know how the memory is shared(or not) between a current Process and a process created with Runtime.exec().My real question is "Does the memory used in the subprocess is the same as the one used by the father process or does a new memory ...

Hello,I'm a beginner. I've created an application wich uses a native procedure, myFunc(), wich paints an image over a Canvas.But now I want to create an Image from each frame that is painted over this Canvas. The paint method is like this one:public void paint(Graphics g) {Rectangle r = ...

Hello people.I have a C++ dll file that is made of many different class. Am stuck at how to arrive at an instance of every class. In other words am not able to strip the dll file into classes that it is comprised of.Am using jniwrapper-3.5 and winpack-3.5. So am not really worried about writing ...

I am taking a intro to programming class and the teacher is not very helpful. I have asked him this same question, but it has been about 3 weeks and still no answer! So, maybe someone from here could help.The computers in our classroom have no problem with running the programs that I write. ...

I am using JNI in my Java application , 12 hours after running my test case get a JVM crash -1) These are the parameters with which i invoke my Java programjava -d64 -Xcheck:jni -Xmx2560M -Xms2560M -Xss256k RunQueries2) The Heap output at the time of the core shows "from space" as 100% used , ...

I have the following codeJavaVM*m_pJVM;/* denotes a Java VM */JNIEnv*m_pEnv;/* pointer to native method interface */JavaVMInitArgsm_VMArgs;JavaVMOptionm_VMOptions;m_VMOptions.optionString = "-Djava.class.path=.;D:\\Program Files\\Java\\jre1.5.0_06\\lib\\ext\\QTJava.zip;";m_VMArgs.version = ...

JDK 1.4.2_12HW: Sun V240 2X 1GHz cpu + 8GMemMEM_ARGS=" -Xms1500m -Xmx1500m -XX:PermSize=270m -XX:MaxPermSize=300m -XX:+UseConcMarkSweepGC -XX:+UseParNewGC \-XX:+PrintCompilation \-XX:+CMSParallelRemarkEnabled -XX:ParallelGCThreads=2 -XX:NewSize=64M -XX:MaxNewSize=64M -XX:SurvivorRatio=4 ...

Hello thereDoes anyone has any idea regarding the rsv_tos option for the jpcap.packet.IPPacket class of the jpcap lib.....Specifically I try to view the TOS field of a Packet (which, by the way, is marked) using the following sc.if(packetr instanceof IPPacket){jpcap.packet.IPPacket ...

i have a java program declaring class A..now in the jni, part i have another C++ program declaring object 'a' of class A. Is 'a" considered a C++ or java object?Also, in the C++ program i haveA *a =new A();a=b->somemethod();return a;now, somemethod also allocates memory for 'a'.A* ...

Hello, AllI've troubles with handling C++ exceptions using JNI and shared library. I'm using Java 1.5_06, RedHat 7.3 and JBoss 4.0.5From Java class I call JNI a method in my shared library(libx.so) which calls a method in other shared library(liby.so). Liby.so uses Xerces library. During ...

I know there are topics related to timeout, stop or kill native call but it seems there is no good answer for me.I have a java class as the caller to call a native C function with double arrays as input. The C function perform some kind of computation using 3rd party FORTRAN functions. If we ...

Hi,I am new to using the JNI, and am in the process of implementing it for my C++ app... I can't find any information, however, on what to do with the jint, jfloat, etc. variables. For example, if I receive a jint with a value of 56, and I want to save that in a regular c++ int in my program - ...

Why does the JVM use/specify the invokevirtual bytecode for final methods, and not the invokespecial?Final methods should have the same behavior/semantics as private methods and <init> methods.

hello all,i am developing a multi threaded java application. the application will run as a service. the application sends/receives sms. the application stores the data in the momory as objects and there is a maintainance orhouse-keeping phase in the application which runs at every 6 ...

Okay, I've read all about these errors and I know what they mean and what to do when the error message is something helpful, like "no <whatever> in library path" or some such.I'm trying to load the Odejava native library for Mac on a computer that is part of a lab, and thus uses remote ...