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A piece of C/C++ code could provide a JNI method with an array of function pointers. But is there a way to call to the stack the functions that array's pointers are pointing to, directly from inside Java code (without using JNI or similar)? JNI somehow does something like that, so there must be a way. How does JNI do it? Is it via sun.misc.Unsafe? Even if it is not, could we use some Unsafe workar
When starting jetty-distribution-9.3.0.v20150612 with openjdk 1.8.0_51 running on an EC2 Amazon Linux machine, is prints that all configured ECDHE suites are not supported. 2015-08-12 16:51:20 main SslContextFactory [INFO] Cipher TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 not supported 2015-08-12 16:51:20 main SslContextFactory [INFO] Cipher TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 not supported
I have a problem with a Java application running under Linux. When I launch the application, using the default maximum heap size (64 MB), I see using the tops application that 240 MB of virtual Memory are allocated to the application. This creates some issues with some other software on the computer, which is relatively resource-limited. The reserved virtual memory will not be used anyway, as far
I have a binary program developed for Linux which reads lines from a server's network stream. Its communication is encrypted in a way that would take me too long to figure out, so I can't rewrite it. After outputting each line, the program calls nanosleep(100000000) (I found this using strace) However, when the server sends multiple lines in quick succession, there's a big delay between the actual
I'm writing a C program where I fork(), exec(), and wait(). I'd like to take the output of the program I exec'ed to write it to file or buffer. For example, if I exec ls I want to write file1 file2 etc to buffer/file. I don't think there is a way to read stdout, so does that mean I have to use a pipe? Is there a general procedure here that I haven't been able to find?
I am trying to capture an image during a live preview from the camera, by AVFoundation captureStillImageAsynchronouslyFromConnection. So far the program works as expected. However, how can I mute the shutter sound?
I 'm trying to use -XX:+UnlockDiagnosticVMOptions -XX:CompileCommand=print,*MyClass.myMethod command lines as described in this post. It seems thats it's available with open-jdk (https://wikis.oracle.com/display/HotSpotInternals/PrintAssembly). How can I use those options (or similar equivalents) with oracle JDK7 and the JVM HotSpot?
Disclaimer I am in no way well versed on the Garbage-First Garbage Collector and this question inspired me to check it out for the first time. There is a chance I may be wrong with some of my information. Intro To get more information about the Garbage-First Garbage Collector (G1GC), the Garbage-First Garbage Collection paper (here, here, here and here) is an invaluable resource. You can find an i
I've been working on the Android SDK platform, and it is a little unclear how to save an application's state. So given this minor re-tooling of the 'Hello, Android' example: package com.android.hello; import android.app.Activity; import android.os.Bundle; import android.widget.TextView; public class HelloAndroid extends Activity { private TextView mTextView = null; /** Called when the activity is
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