version

I'm new to programming in D. What are the pros and cons of choosing either DMD (2.061) or GDC (4.6, 4.7 or 4.8, snapshot). And what GDC version should I pick? I've successfully built a recent snapshot of GCC-4.8 and GDC-4.8 and it compiles a hello world program. Here are my thoughts on pros so far: GDC : More platforms, run-time performance DMD : compilation-performance, more tested? What about debugging support through GDB - does it differ between GDC and DMD? Michal Minich Use DMD as it is the reference implementation and is most widely used. It is also the most up to date as new features

I was writing an Android app for Android SDK 2.3.3 but then I was asked to test it on a device running Android 2.2.1. So I set my target to 8 instead of 10. But then java.util.concurrent.TimeUnit only had the Java 1.5 feature set instead of the Java 1.6/1.7 feature set of java.util.concurrent.TimeUnit. So I put the openjdk 6 implementation of TimeUnit into my package for my Android app and everything works fine. Does anyone know where I can get some documentation that gives me a chart that tells me, for example, that when using the official SDK, Android 2.2 has to be coded using Java 1.5

一、熟悉一下问题来龙去脉 转载自 点击 环境： jdk 1.6； jboss 5.1.0.GA eclipse 4.2 这里可以配置的jdk，还有个java compiler中可以配置compiler level（如图中红色框）。这两个东西就是这个问题的关键。 在eclipse中进行开发的时候，build path 中JDK进行类库的编译（就是你使用类在不在这个JDK中)，java compiler compliance level是对这个项目语法的编译（就是你的项目中语法的正确与否），也可以把java compiler compliance level中配置的编译版本号的作用看作是你这个项目将来开发完毕之后，要放到服务器上运行，那个服务器上JDK的运行版本。 而我的问题就出在build path中配置1.6的JDK，java compiler compliance level中配置的1.7(因为以前我用过一段时间1.7) 而在jboss服务器上是1.6的JDK，就报了那个错误，说是编译所用的jdk（1.7）比运行所用的jdk（1.6）高了，这是错误的。 放在其他人机器上之所以不报错，是因为他的jboss使用的jdk恰恰是1.7。这个版本是向下兼容的。 再拿个被人举过的例子，如果JDK1.4不能使用泛型。而java compiler compliance

This question... Check iOS version at runtime? ...received an answer explaining how to test if a class supports a method. (Over time, Apple may have added methods that the class, as presented in an old iOS, would not have. Rather than test for the iOS version, just test the class directly.) Can the same thing be done for a library? I want to keep building my products for iOS 3.1.3, but I'd like to make use of CTTelephonyNetworkInfo when the users have iOS 4.0, which is the earliest iOS that supports it. Is this possible? The solution here is to weak link against frameworks which are only

I have multiple version of jre's installed on my system. Is there any way i would know which JRE version is being used by the application during run time. There might be possible that application may use lower version of JRE -"Not Sure" Thanks in Advance. Using System.getProperty("java.version") will return the version of the currently running JVM. Sometimes this does not return anything (don't know why). In that case you can try: System.getProperty("java.runtime.version"); Like a_horse_with_no_name said: you can do this by calling System.getProperty("java.version") . If you need this