runtime

重试的工具类 Guava-retrying 依赖 <!-- https://mvnrepository.com/artifact/com.github.rholder/guava-retrying --> <dependency> <groupId>com.github.rholder</groupId> <artifactId>guava-retrying</artifactId> <version>2.0.0</version> </dependency> 　　 Retryer<Boolean> retryer = RetryerBuilder.<Boolean>newBuilder() //抛出runtime异常、checked异常时都会重试，但是抛出error不会重试。 .retryIfException() //返回false也需要重试（可以根据返回值确定需不需要重试） .retryIfResult(Predicates.equalTo(false)) //重调策略 .withWaitStrategy(WaitStrategies.fixedWait(10, TimeUnit.SECONDS)) //尝试次数 .withStopStrategy(StopStrategies.stopAfterAttempt(3)) .build(); try { retryer.call

I want to do the next thing: String[] cmd = {"cmd","/c","c:\\Program Files (x86)\\Microsoft Office\\Office12\\WINWORD.exe","/mOpenPage","c:\\Navodilo.doc"}; Process proc = Runtime.getRuntime().exec(cmd); But, without to specify the winword.exe path but open the document with the macro... I read that there exist Auto Open macro, is it possible to specify input arguments for Auto Open macro? SOLVED: String[] cmd = {"cmd","/c","start","WINWORD.exe","/mOpenPage","c:\\Navodilo_za_uporabo_spletnega_servisa_wsEdp.doc"}; Process proc = Runtime.getRuntime().exec(cmd); It runs default winword.exe and

I'm clear about the generic functions and generic data-types. In the generic type: data SB = forall x. (show x) => SB x instance Show SB where show (SB x) = show x so for any given type x , if it has a signature of Show , and there sure be a show function corresponds to it. but when typing in ghci, e.g. :t 1 outputs 1 :: Num a => a if binds 1 to a name: let a=1 :t a now a has a true type. The question is: What is 1 's form in the run-time system (before it has a type, it has only Num ) , since it can only hold some info of what it can be transformed to. Are there some internal functions for

I'm quite new to c++ and I'm trying to achieve something a bit tricky, for which I can't seem to find a satisfiable solution. Let's say I have these two functions: template <class T1, class T2> void foo(T1 param1, T2 param2){...}; template <class T1, class T2> void bar(T1 param1, T2 param2){...}; And at runtime, I want to select on of these two functions, and instantiate it with some template types obtained from a user input, say a char c . So I could do something like: double d; float f; switch(c) { case 'a': foo(d, f); break; case 'b': foo(f, d); break; case 'c': bar(d, f); break; case 'd':

Java入门——在Linux环境下安装JDK并配置环境变量 摘要：本文主要说明在Linux环境下JDK的安装，以及安装完成之后环境变量的配置。 安装 使用已下载的压缩包进行安装 在Java的官网上下载需要的版本： https://www.oracle.com/technetwork/java/javase/downloads/index.html 因为是在Linux环境上安装，所以要下载 .tar.gz 后缀的文件，才能在Linux系统里进行解压缩。 注意下载的压缩包要和Linux系统的位数相匹配，可以通过 cat /proc/version 命令查看系统的版本。 使用工具将下载好的文件上传到装有Linux系统的电脑上。 将压缩包的内容解压缩到 /opt 目录： 1 [root@localhost opt]# tar -zxvf jdk-8u91-linux-x64.tar.gz 等待解压缩完成，至此，Java在Linux上就安装完成了。 使用yum命令进行安装 使用 yum search jdk 命令查看可用安装包： 1 [root@localhost opt]# yum search jdk 2 已加载插件：fastestmirror 3 Loading mirror speeds from cached hostfile 4 * base: mirrors.tuna

Method Swizzling 原理 在Objective-C中调用一个方法，其实是向一个对象发送消息，查找消息的唯一依据是selector的名字。利用Objective-C的动态特性，可以实现在运行时偷换selector对应的方法实现，达到给方法挂钩的目的。 每个类都有一个方法列表，存放着selector的名字和方法实现的映射关系。IMP有点类似函数指针，指向具体的Method实现。 我们可以利用 method_exchangeImplementations 来交换2个方法中的IMP， 我们可以利用 class_replaceMethod 来修改类， 我们可以利用 method_setImplementation 来直接设置某个方法的IMP， …… 归根结底，都是偷换了selector的IMP. // // MRProgressOverlayView+runtime.m // Identify // // Created by wupeng on 15/12/3. // Copyright © 2015年 StarShine. All rights reserved. // #import "MRProgressOverlayView+runtime.h" #import <objc/runtime.h> #import "StringUtils.h" #import