Java Ee Install Eclipse
Rosicler Kleckner
I am quite new to Ubuntu and I see there are many folders in the root directory (/etc, /usr, /opt etc.). I would like to know if there is a standard folder where I should install java, eclipse and any other tar.gz files that are intended for unpacking and then compiling generally?
In general you do -not- install software using tar.gz files. These files are containers that hold software (that might contain software to install but normally you get is all done and ready for you to use). You use either Ubuntu software center or debian installer files to install software.
Currenty on my desktop, I have two files as adt-bundle-windows-x86_64-20140702 and jdk-7u71-windows-x64, and I have windows 10 operation system. So could anyone explain me step by step what to do in order to execute eclipse.exe?
Welcome to SF.SE mertimiks. I've retitled your post to reflect what you've really asked, which is how to install Eclipse and the Java SDK into Windows 10. The first thing you need to do is install the Java SDK on your machine (jdk-7u71-windows-x64) by double-clicking on it as it should be an executable file. If it's not, extract it and run setup from within the root directory. Java support is provided at Oracle.com.
After rebooting, you'll need to extract the adt-bundle-windows-x86_64-20140702 file into a folder on your machine. Once you've done that, locate Eclipse.exe and create a shortcut for it and run it. There should be a "readme" file inside the root of the extracted folder, or one level in, with more explicit instructions. Eclipse support is provided at Eclipse.org.
Yes. Eclipse is portable. However you need to specify the workspace folder and the Java VM on the command line. This prevents eclipse from using the broken VM that comes with windows and allows it to access the workspace even if the drive letter has changed.
Eclipse does store all of its plugins and configuration in its own directory structure, so making it portable it surprisingly easy and intuitive. I've used Eclipse in a portable fashion with no problems at all. All I can recommend is a couple of extra steps to make your life just that bit easier and this is what I do:
This means it can work on any machine that doesn't have Java installed without having to run special command line or path settings. Just run eclipse.exe and it finds the Java runtime in jre for you and carries on happily. Neato.
After that when Eclipse asks for a workspace I simply enter .\Workspace so that the workspace directory is created within the eclipse directory, and it seems that all the workspace details are kept under that directory in a "relative directory" fashion so it doesn't matter if the drive letter changes. Plugins like Pydev keep their settings in the workspace folder (in a folder named ".metadata") so once you've set it up they'll get remembered between places too.
For school, I chose to assign my Eclipse workspace to a Dropbox shared directory. Each time I started Eclipse, I used that directory as the workspace. It helped me work in multiple installs of Eclipse at the same time quite easily.
Old question, but since the apparition of Oomph, the Eclipse installer, Eclipse is no longer portable: it pollutes your home user directory, and it creeps in at least 6 different configuration files, located in 5 different directories. It has become a nightmare.
As many others said, Eclipse is portable and/or can be made portable quite easy. Keep in mind that - depending on the project type - a lot of write activity may happen on the workspace contents (not the installation), for example when auto-building the class files after saving a Java file or to keep the local workspace history. This might not only slow down Eclipse significantly, but it might also lower the life expectancy of you flash drive.
Install Java. First, to run Eclipse, a Java Runtime Environment (JRE)must be installed. You verify that you have the JDK 8 installed by runningthe java -version command (from the Command prompt in Windows or the terminalon Mac):
Unit testing is a method of testing source code that verifies that individualunits are working properly. A unit of code refers to the smallest testable partof an application. In OCaml, this was a function, and in Java, this is a method.JUnit is a Java package that implements unit testing. Eclipse provides tools toautomate the creation of JUnit tests. It also provides a good interface forrunning the tests. Together these two tools make systematically testing yourprogram very easy.
This wiki page explains how you can configure Eclipse to launch with Java 9 and above. This also explains how the Java 9 support can be installed for Eclipse 4.7. Java 9 reorganizes the runtime into modules, but this conflicts with the way Eclipse organizes its own runtime.
If Java is automatically found when launching Eclipse, you need to specify the location of your Java VM. If you already do this, simply replace it with a Java 9 VM. Otherwise it can easily be done by adding something like:
Your project might fail to run because you use types that are neither in java.base or java.se.ee, e.g. types from javafx.base. In that case you have to figure out which module(s) you need to add with --add-modules.
We recommend to install the support via Eclipse Marketplace because it is crucial that the Eclipse install, the Java 9 VM and the patch match. If you are not using an EPP with a pre-installed Marketplace Client, you must install it first (from the General Purpose Tools category of the P2 repo).
I first learned Vim in university and, since then, it has been a welcomecompanion for the majority of my software engineering career. Working withPython and Go programs felt natural with Vim and I was always felt productive.Yet Java was always a different beast. Whenever an opportunity to work withJava came up, I would inevitably try Vim for a while, but fall back to IntelliJand the IdeaVim plugin to take advantage of the rich language features afull-featured IDE can give you.
The nice thing about this diagram is that it is not specific to Java. Once youunderstand how to get things working for one language, you can repeat theprocess for any language that implements the language server protocol and debugadapter protocol. For Java, we use Eclipse JDTLS as the language serverimplementation, andvscode-java-debug as thedebug adapter (which leverages java-debug).
If you are working through this guide to setup Noevim as a Java IDE, it iseasiest if you add a single plugin at a time, understand how to configureit, how to use it, and what functionality it provides, and then add moreplugins. This way you get a better sense of what changes you are making to theNeovim environment without getting overwhelmed.
Neovim supports the Language Server Protocol (LSP) out of the box, acting as aclient to LSP servers and including a Lua framework called vim.lsp forbuilding enhanced LSP tools. The general advice for getting started with thebuilt-in client is to usenvim-lspconfig, which providesdefault configurations for many differentlanguages.
Some languages have plugins supporting richer LSP functionality. Java is one ofthem. nvim-jdtls providesextensions to the built-in LSP client like organizing imports, extractingvariables, and code generation. Both nvim-lspconfig and nvim-jdtls use theclient built into Neovim, the main differences are that nvim-jdtls adds someadditional handlers and functionality, as well as simplifying theconfiguration. One of the advantages of using nvim-jdtls is that, once up andrunning, you can use the same Neovim keybindings and client functionality thatyou may already be using for other lanuages without having to learn aplugin-specific way of interacting.
The following diagram, from the nvim-jdtls documentation, shows how itdiffers from nvim-lspconfig. Both use the Lua bindings already built-in toNeovim, but are setup and configured slightly differently.
Configuring nvim-jdtls can be intimidating. The following exampleconfiguration is commented to show how I setup nvim-jdtls on my developmentmachine. Most of the options come directly from the Eclipse JDTLSdocumentationand are specific to jdtls.
To start jdtls using this configuration, place the file above in the folder.config\nvim\ftplugin\java.lua. Neovim will automatically execute this codewhenever a file of type Java is loaded into the current buffer. (ftpluginis shorthand for filetype plugin).
Although the configuration seems like a lot, it can be broken down into a fewsections. First, we create the required keymappings for the LSP client. Then wespecify the options to pass to eclipse.jdt.ls, and lastly, we set the commandto use to launch eclipse.jdt.ls. Once we get that configuration in place, wepass it as a parameter to jdtls.start_or_attach, which will start thelanguage server or attach to an existing running instance if the server isalready started.
The Debug Adapter Protocol(DAP) is a companionproject to the Language Server Protocol. The idea behind the Debug AdapterProtocol (DAP) is to abstract away how the debugging support of developmenttools communicates with debuggers or runtimes. Because debuggers already existfor many languages, DAP works alongside an adapter to match an existingdebugger or runtime to the debug adapter protocol, rather than assuming a newdebugger needs to be written to match the protocol.
nvim-dap is a DAP clientimplementation. Working alongside a debug adapter, nvim-dap can launch anapplication to debug, attach to running applications, set breakpoints, stepthrough code, and inspect the state of an application.
nvim-dap requires a debug adapter that acts as a facilitator between nvim-dap(the client), and a language-specific debugger. The following diagram, from thenvim-dap documentation, shows how these pieces interact.
Like the LSP protocol, the DAP protocol requires us to install additionalcomponents. Unfortunately, perhaps due to the relative immaturity of the DAPprotocol, the process is more involved than for the LSP server.
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