Java has a dup2_x2 instruction which, according to the documentation, has the following behavior: Duplicate the top one or two values on the operand stack and insert the duplicated values, in the original order, into the operand stack. Does javac produce bytecode with this instruction? What are its potential use cases? Answer For example, the following code compiles to See,
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Tag: javac
IntelliJ 2021.2.2 gives error ‘java: error: invalid source release: 18’ when compiling program
I’ve looked trough many answers here on so but haven’t found anything helpful. I am using java version 16.0.1 My program doesn’t use maven or gradle. The program worked fine until I updated my ij earlier today. Full error: Here are the files from .idea and the .iml file: https://1drv.ms/u/s!AoGu278qdPOWgm-D3ns61-gqA4Ts?e=OWg0NB Please tell if you need any more information (: Answer
Antlr4 Project Directory Structure Issue
I’m trying to set up an Antlr4 project using Java’s package directory structure. The top level directory contains PondParser.g4, PondLexer.g4, and build_script. build_script is expected to build and …
Ant Javac compile subpackage class files to the parent src directory
I would like Ant 1.9 to be able to compile servlet classes to the parent src directory, but the file system has the files in packages. No, the packages are not declared in the servlet files. The code …
Javac – plugin not found
I am trying to make my own Javac plugin but things aren’t going so well already 🙁 I am following this tutorial: https://www.baeldung.com/java-build-compiler-plugin and when I want to test the first …
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