bytecode

问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: Is there a java classfile / bytecode editor to edit instructions? Java source code is compiled into bytecode, which is actually in the class file. Is it possible to view bytecode of a compiled class? If it is possible, can it be edited? Is there an eclipse plugin for that available? 回答1: Yes. You can use the javap command that's included with the JDK to see the byte code of a class. For example: javap -c com

问题 What is exactly the function of Python\'s Global Interpreter Lock? Do other languages that are compiled to bytecode employ a similar mechanism? 回答1: In general, for any thread safety problem you will need to protect your internal data structures with locks. This can be done with various levels of granularity. You can use fine-grained locking, where every separate structure has its own lock. You can use coarse-grained locking where one lock protects everything (the GIL approach). There are

问题 Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. My understanding is that C/C++ produces native code to run on a particular machine architecture. Conversely, languages like Java and C# run on top of a virtual machine which abstracts away the native architecture. Logically it would seem impossible for Java or C# to match the speed of C++ because of this intermediate

问题 Just wondering if anyone has tried using new Java 7 language features with Android? I know that Android reads the bytecode that Java spits out and turns it to dex. So I guess my question is can it understand the bytecode of Java 7? 回答1: If you are using Android Studio , the Java 7 language should be enabled automatically without any patches. Try-with-resource requires API Level 19+, and NIO 2.0 stuff are missing. If you can't use Java 7 features, see @Nuno's answer on how to edit your build

问题 I know that PHP is compiled to byte code before it is run on the server, and then that byte code can be cached so that the whole script doesn\'t have to be re-interpreted with every web access. But can you \"compile\" PHP code and upload a binary-ish file, which will just be run by the byte code interpreter? 回答1: After this question was asked, Facebook launched HipHop for PHP which is probably the best-tested PHP compiler to date (seeing as it ran one of the world’s 10 biggest websites).