runtime

I am developing a simple Java IDE like Netbeans/Eclipse. My GUI includes two JTextArea component, one used as a TextEditor where the end user can type in his programs and the other used as an output window. I am running the users programs by invoking the windows command prompt through Java Runtime and Process classes. I am also catching the IO streams of the process using the methods getInputStream(), getErrorStream(), getOutputStream(). If the program contains only the statements to print something onto the screen, I am able to display the output on the output window(JTextArea). But if it

Go性能调优 在计算机性能调试领域里，profiling 是指对应用程序的画像，画像就是应用程序使用 CPU 和内存的情况。 Go语言是一个对性能特别看重的语言，因此语言中自带了 profiling 的库，这篇文章就要讲解怎么在 golang 中做 profiling。 Go性能优化 Go语言项目中的性能优化主要有以下几个方面： CPU profile：报告程序的 CPU 使用情况，按照一定频率去采集应用程序在 CPU 和寄存器上面的数据 Memory Profile（Heap Profile）：报告程序的内存使用情况 Block Profiling：报告 goroutines 不在运行状态的情况，可以用来分析和查找死锁等性能瓶颈 Goroutine Profiling：报告 goroutines 的使用情况，有哪些 goroutine，它们的调用关系是怎样的 采集性能数据 Go语言内置了获取程序的运行数据的工具，包括以下两个标准库： runtime/pprof ：采集工具型应用运行数据进行分析 net/http/pprof ：采集服务型应用运行时数据进行分析 pprof开启后，每隔一段时间（10ms）就会收集下当前的堆栈信息，获取格格函数占用的CPU以及内存资源；最后通过对这些采样数据进行分析，形成一个性能分析报告。 注意，我们只应该在性能测试的时候才在代码中引入pprof。

in my application i am using a code that run a batch file, on executing it i am getting a exception i.e. current thread is not owner. Here i want to mention that my application is based on eclipse plugin development. Following is my code, please have a look and find out what is the problem to help me.. /*.......any code.........*/ try { Runtime runtime = Runtime.getRuntime(); String cmd = new String(C:\\abc.bat); process = runtime.exec("\"" + cmd + "\""); process.wait(); } catch (Exception e) { e.printStackTrace(); } /***********any code**************/ The wait is the method owned by Object,

I calculate my runtime complexity to be 4 , what is the Big O notation of this? For example if my runtime complexity is 4 + n then its Big O = O(n) . Let's look loosely at the definition of what we mean by f(n) is in O(g(n)) : f(n) is in O(g(n)) means that c · g(n) is an upper bound on f(n) . Thus there exists some constant c such that f(n) ≤ c · g(n) holds for sufficiently large n (i.e. , n ≥ n0 for some constant n0 ). You can treat a constant function just as any other function, w.r.t. analysing its asymptotic behaviour using e.g. big-O notation. f(n) = 4 g(n) = 1 f(n) ≤ c · g(n) = c · 1,

Is there any way I can lower my build size when I am using static linking for the C++ runtime libraries in VS2013? My original file was just 15kb, but I couldn't run it on my other computers without a missing .dll message popping up. I decided to use static linking and now the size is ~100kb. I am using the Windows.h header and WinAPI functions. If you're only going to display a MessageBox, you don't need to link to any static libraries. #include <windows.h> void entry(void) { MessageBox(NULL, "Hello, World!", "", MB_OK); ExitProcess(0); } Compile and link using VC++2013, with the following

I'm making a frontend for a command line app. It has a very long The command line is something simliar to this: public String liveShellCommand(){ String cmd="command mode --parameter arg --parameter2 arg2 --parameter3 arg3"; Runtime run = Runtime.getRuntime() ; Process pr ; try { log.progress("sending command: " +cmd); pr = run.exec( cmd ); pr.waitFor() ; Everything seems to work until I add the "mode" switch into it. The "mode" switch executes from the command line. I've tried a few combinations splitting the parameters into an array which does not execute either. I think it has something to

I have run into an issue where , when using Java Runtime to run another java program, the program freezes because the other program requires stdin . There is a problem with handling the stdin after executing another java program with Runtime exec() . Here is sample code that I can't get to work. Is this even possible? import java.util.*; import java.io.*; public class ExecNoGobble { public static void main(String args[]) { if (args.length < 1) { System.out.println("USAGE: java ExecNoGobble <cmd>"); System.exit(1); } try { String[] cmd = new String[3]; cmd[0] = "cmd.exe" ; cmd[1] = "/C" ; cmd[2