10 More Discussions You Might Find Interesting
1. Programming
Hi All,
We recently moved to Red Hat Enterprise Linux Server release 6.6 from Solaris 10.
The existing Java code to send emails in Solaris is
public class card_cardMessenger{ /** * Send an e-mail message via the Runtime class * @see Runtime * @return boolean (success or failure of... (1 Reply)
Discussion started by: Meghan2525
1 Replies
2. Linux
Hi
How can I write a Java program to execute Linux commands? What is the best approach:
Invoking the Linux shell within Java and executing commands
or, using the Java APIs to do the stuff. Since it is platform independent, it'll know itself what to do. We need not check which OS the Java... (1 Reply)
Discussion started by: Dorothy
1 Replies
3. Programming
Hello
Please why the files have not created?
Thank you (0 Replies)
Discussion started by: chercheur857
0 Replies
4. Programming
Hello,
I have a project directory in /home/researcher
I have in my project/src three packages:A (contains the main class), B and C and I have 2 jar-files file1.jar file2.jar files in the project/my-jars
In Class A I import other classes from the other packages
I compiled as follows:... (4 Replies)
Discussion started by: chercheur857
4 Replies
5. Programming
Hi,
I have a requirement where users will send excel(.xls) file to Linux Platform using ftp/sftp. After that the excel file needs to be read using java on linux and converted into csv.
I am using jxl to parse the excel, but few character like £ are not getting parsed properly. If i open the... (0 Replies)
Discussion started by: joy_bt
0 Replies
6. Android
In case you did not know, Android 2.1, Éclair, runs on the 2.6.29 Linux kernel. However, the user space it is built atop Dalvik, a Google-designed custom JVM (Java virtual machine).
This is pretty interesting, when you think about it. The core of Android is the linux kernel, and the standard... (5 Replies)
Discussion started by: Neo
5 Replies
7. UNIX for Advanced & Expert Users
Hi,
Need help in tuning JAVA on LINUX.
From http://www.trutek.com/index.php?id=173 I understand that on Linux operating system with 4GB memory, JVM can be run with maximum memory of 3800m. But I had no luck. Could someone help me in achieving on Red Hat Linux server.
Here is the details of... (5 Replies)
Discussion started by: crabbie_upk
5 Replies
8. UNIX for Dummies Questions & Answers
is it advisible to do Linux Programming in JAVA.. If so, whats the advantage over C++ or C.. Cud anyone also help me out by providing some links in this regard.. Would be highly appreciated.. (1 Reply)
Discussion started by: srikumar_cs
1 Replies
9. Linux
i wish to run java files on inux but while downloading it into linux there is no problem but when i r try to execute a java file it says javac not found. help pleas (5 Replies)
Discussion started by: wojtyla
5 Replies
10. UNIX for Dummies Questions & Answers
DOes any1 know if the java.awt and javax.swing packages are
installed in Redhat Linux 9.0 or not??. I have compiled a simple Java program and ran it but the Java programs related to GUI are not working. Can any1 provide some Help?. (4 Replies)
Discussion started by: rahulrathod
4 Replies
jvisualvm(1) General Commands Manual jvisualvm(1)
NAME
jvisualvm - Java Virtual Machine Monitoring, Troubleshooting, and Profiling Tool
SYNOPSIS
jvisualvm [ options ]
PARAMETERS
Options, if used, should follow immediately after the command name. Options may be in any order. For a discussion of parameters that apply
to a specific option, see OPTIONS below.
DESCRIPTION
Java VisualVM is an intuitive graphical user interface that provides detailed information about Java technology-based applications (Java
applications) while they are running on a given Java Virtual Machine (JVM(*)). The name Java VisualVM comes from the fact that Java Visu-
alVM provides information about the JVM software visually.
Java VisualVM combines several monitoring, troubleshooting, and profiling utilities into a single tool. For example, most of the function-
ality offered by the standalone tools jmap, jinfo, jstat and jstack have been integrated into Java VisualVM. Other functionalities, such as
some of those offered by the JConsole tool, can be added as optional plug-ins.
OPTIONS
The following option is possible when you launch Java VisualVM.
-J<jvm_option>
Pass this <jvm_option> to the JVM software.
USAGE
Java VisualVM is useful to Java application developers to troubleshoot applications and to monitor and improve the applications' perfor-
mance. Java VisualVM can allow developers to generate and analyse heap dumps, track down memory leaks, perform and monitor garbage collec-
tion, and perform lightweight memory and CPU profiling. Plug-ins also exist that expand the functionality of Java VisualVM. For example,
most of the functionality of the JConsole tool is available via the MBeans Tab and JConsole Plug-in Wrapper plug-ins. You can choose from a
catalog of standard Java VisualVM plug-ins by selecting 'Tools' | 'Plugins' in the Java VisualVM menus.
Start Java VisualVM with the following command:
% jvisualvm <options>
SEE ALSO
For more details about Java VisualVM see the following pages.
o Java VisualVM developers' site @
https://visualvm.dev.java.net
o Java VisualVM in Java SE platform documentation @
http://java.sun.com/javase/6/docs/technotes/guides/visualvm/index.html
(* The terms "Java Virtual Machine" and "JVM" mean a Virtual Machine for the Java platform.)
26 Mar 2008 jvisualvm(1)
