runtime

How to execute a java program with the help of Runtime.getRuntime().exec(). For example we shall have the java file path as c:/java/abc.java. Please help me with the code. Assuming that abc.java contains a main method that you want to execute: Runtime.getRuntime().exec("javac c:\java\abc.java -d c:\java\") Runtime.getRuntime().exec("java c:\java\abc") VonC Do not forget that: you may need to read stdout/stderr of a java program you may have to set/update environment variable and PATH before executing your java command CreateProcess: c:\j2sdk1.4.0\bin\helloworld error=2 means Win32's

Using Visual Studio, I have built an C++ application running in 32bit. It will be deployed both to 32-bit and 64-bit Windows servers. It won't be run in 64-bit mode (but rather under WoW). Should I include both the 32-bit and 64-bit Visual C++ redistributable, and install 32bit on 32bit Windows and 64bit on 64 bit Windows, or is it enough to just install the 32bit redistributable? It is enough to install the 32bit redistributable. EDIT: I commented below on a misleading answer, but the answer is you only need the 32-bit redistributables, as Karel Petranek answered first. This is not an answer.

I need to allow client users to extend the data contained by a JPA entity at runtime. In other words I need to add a virtual column to the entity table at runtime. This virtual column will only be applicable to certain data rows and there could possibly be quite a few of these virtual columns . As such I don't want to create an actual additional column in the database, but rather I want to make use of additional entities that represent these virtual columns . As an example, consider the following situation. I have a Company entity which has a field labelled Owner , which contains a reference

I am thinking about adding ODBC database connectivity to an application. The user will at runtime configure and select their database odbc connection. Are there any components that will give me the required series of dialogs ? Allowing the user to select the data source type, select drivers, browse already defined ODBC connections etc. Cheers Sam You can try this, if you are using ADO components. Option 1 Uses OleDB, ComObj, ActiveX; function Edit_ADO_ODBC_ConnectionString(ParentHandle: THandle; InitialString: WideString;out NewString: string): Boolean; var DataInit : IDataInitialize; DBPrompt

As I understand correctly, besides the fact that Objective-C language is a strict superset of a "clean" C, added OOP paradigm is simulated by a set of functions partially described in Objective-C Runtime Reference . Therefore, I'm expecting a possibility to somehow compile Objective-C code in an intermediate C/C++ file (maybe with some asm inserts). Is it generally possible ? You could use the clang rewriter to convert to C++. Not aware of a way to go to C though. The rewriter is available via the "-rewrite-objc" command line option. As far as I know, there is no software that preprocesses

runtime.Caller() package main import ( " fmt " " path " " runtime " ) // runtime.Caller() func rc () { pc , file , line , ok := runtime. Caller ( 1 ) // 表示调用的层数，0 是他本身，1 是谁调用的他 2 再往上找一层 if !ok { fmt. Printf ( " runtime.Caller() failed \n " ) return } funcName := runtime. FuncForPC (pc). Name () fmt. Println (funcName) // main.main fmt. Println (file) // /Users/liuqixiang/project/go_study/src/oldbody.com/day6/03runtime_demo/main.go fmt. Println (path. Base (file)) // main.go fmt. Println (line) // 24 } func main () { rc () } 来源： https://blog.csdn.net/qq_34857250/article/details/100569684

[TOC] 调用系统命令打开对应资源 自动打开系统默认浏览器或者图片 darwin： open http://baidu.com windows： start http://baidu.com linux： xdg-open http://baidu.com package main // 打开系统默认浏览器 import ( " fmt " " os/exec " " runtime " ) var commands = map [ string ] string { " windows " : " start " , " darwin " : " open " , " linux " : " xdg-open " , } func Open ( uri string ) error { run , ok := commands[runtime. GOOS ] // 获取平台信息 if !ok { return fmt. Errorf ( " don't know how to open things on %s platform " , runtime. GOOS ) } cmd := exec. Command (run, uri) return cmd. Start () } func main () { Open ( " http://baidu.com " ) //

创建新类 添加方法 isa-swizzling 测试方案： 添加全局断点 objc_allocateClassPair objc_registerClassPair class_addMethod 在动态添加类及属性这块,主要用的的 runtime函数是 1).objc_allocateClassPair—–通过这个函数,可以创建出一个类 2).class_addIvar—–为该类添加实例变量 3).sel_registerName—–注册一个 SEL方法 4).class_addMethod—–为创建的类动态添加方法 5).objc_registerClassPair—–为创建的类进行注册 6).class_getInstanceVariable—–获取类中的实例变量 7).object_setIvar—–为对象中的变量赋值 8).objc_disposeClassPair—–销毁创建出来的类 ———————————————— 版权声明：本文为CSDN博主「CINNS」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。 原文链接：https://blog.csdn.net/nvlangxin/article/details/51610818 来源： https://www.cnblogs.com/feng9exe/p/11460994.html

AndFix，全称是 And roid hot- fix 。是阿里开源的一个Android热补丁框架，允许APP在不重新发布版本的情况下修复线上的bug。支持Android 2.3 到 7.0。 一、动态加载 热修复、热更新、插件化都是利用动态加载的原理（相关知识：类加载机制、虚拟机） 二、热修复 Andfix （最轻量级的热修复，只能改方法）Android热修复的先驱，通过动态加载dex文件，在native层进行方法替换实现热修复，局限性：兼容性问题，每个Android版本都需要维护一套Andfix的实现代码，维护麻烦，现该开源库已停止维护了。优点：即时生效。 Tink dex替换，是在java层实现，不足：冷启动后生效 三、源码追踪 要通过方法替换实现热修复，那么就需要去了解一下底层的类加载机制，特别是方法加载这一块的具体实现流程。 大概流程就是先加载类，然后再将类中的 method 和 field 加载到 class 中，具体如下： 1、 env->FindClass jni函数中找到类的函数（方法在类里面，根据类加载找到方法加载的途径） 2、 ClassLinker::FindClass 是env->FindClass的主要实现的函数。 3、 DefineClass 是ClassLinker::FindClass 中返回的类的类型。 4、 LoadClass