runtime

I like some features of D, but would be interested if they come with a runtime penalty? To compare, I implemented a simple program that computes scalar products of many short vectors both in C++ and in D. The result is surprising: D: 18.9 s [see below for final runtime] C++: 3.8 s Is C++ really almost five times as fast or did I make a mistake in the D program? I compiled C++ with g++ -O3 (gcc-snapshot 2011-02-19) and D with dmd -O (dmd 2.052) on a moderate recent linux desktop. The results are reproducible over several runs and standard deviations negligible. Here the C++ program: #include

My aim is to change an application language from English to Chinese during runtime, is there any suggestions? language_spinner = (Spinner)findViewById(R.id.settings_language_spinner); language_spinner.setOnItemSelectedListener(new OnItemSelectedListener() { public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { if (pos == 1){ Toast.makeText(parent.getContext(),"You have selected English",Toast.LENGTH_SHORT).show(); setLocale("en"); }else if (pos == 2){ Toast.makeText(parent.getContext(),"You have selected Chinese",Toast.LENGTH_SHORT).show(); setLocale("zh"); } }

原文链接： https://blog.csdn.net/meism5/... JRE：Java Runtime Environment（java运行时环境）。即java程序的运行时环境，包含了java虚拟机，java基础类库。 JDK：Java Development Kit（java开发工具包）。即java语言编写的程序所需的开发工具包。 JDK包含了JRE，同时还包括java源码的编译器javac、监控工具jconsole、分析工具jvisualvm等。 来源： https://www.cnblogs.com/skycto/p/11524307.html

This question already has an answer here: Is there anything that guarantees constant time for accessing a property of an object in JavaScript? 1 answer var obj = {}; obj["A"] = true; obj["B"] = true; obj["C"] = true; console.log(obj["D"]); The above code will print "undefined". What is the runtime complexity when javascript is trying to access obj["D"] ? I guess it will be the same as it is trying to access obj["A"]? The reason why I am asking this is because I am comparing the efficiency between these two code: //Code 1 var x = ["a","b","c"]; var y = ["a","b","c"]; for(i = 0; i<x.length; i++)

I need to run a couple of other programs from my own Java program, basically I need to run these command line statements. svn log --xml -v > svn.log and java -jar example.jar arg1 arg2 and I need to use the text outputs written to the console from these programs in my own program. I've tried Runtime.getRuntime().exec() with the svn, but it doesn't seem to be doing anything because it doesn't make a svn.log file. Also both programs need to be called in different places, the svn line needs to be called from inside one folder and the java line needs to be called from another. Any ideas on how to

一.Runtime.addShutdownHook理解 在看别人的代码时，发现其中有这个方法，便顺便梳理一下。 void java.lang.Runtime.addShutdownHook(Thread hook) 该方法用来在jvm中增加一个关闭的钩子。当程序正常退出,系统调用 System.exit方法或虚拟机被关闭时才会执行添加的shutdownHook线程。其中shutdownHook是一个已初始化但并不有启动的线 程，当jvm关闭的时候，会执行系统中已经设置的所有通过方法addShutdownHook添加的钩子，当系统执行完这些钩子后，jvm才会关闭。所以 可通过这些钩子在jvm关闭的时候进行内存清理、资源回收等工作。 二.示例代码 Java代码 public class TestRuntimeShutdownHook { public static void main(String[] args) { Thread shutdownHookOne = new Thread() { public void run() { System.out.println( "shutdownHook one..." ); } }; Runtime.getRuntime().addShutdownHook(shutdownHookOne); Runnable threadOne =