Develop Reference

Cloud Endpoints Framework on IntelliJ IDEA 2017

I followed the steps described at the docs for Cloud Tools for IntelliJ, I got installed the plugin, and I also created a project following the wizard:
This is what the skeleton generated:
I go to the run/debug configs
And there's the server, but no deployment
I add my code to src folder, idk if it's necessary to create the main>java>com.example.project structure
And here's where I'm stuck, how do I generate openApi specs? how to I build and deploy to App Engine? I've seen configurations with gradle and maven, but don't know that much about each one, If any of both is needed I would prefer to work with gradle, but I would like the steps to do it.

Java dynamic web project is not building

I have modified the Web content folder & then did the Clean project followed by build project. But still there is no change in project.
I am using tomcat server 7 & JRE1.7.
What is the best way to build a java dynamic web project? How to ensure each & every file of the project gets re-build?

I cannot create a comment on this question so have to put it up as an answer..
Java dynamic web project is not building
What kind of build tool are you using? i.e Maven, Gradle, Ant
I have modified the Web content folder & then did the Clean project
followed by build project. But still there is no change in project. I
am using tomcat server 7 & JRE1.7.
Tomcat is there to deploy your web project, so if your build is failing you will not be able to deploy it successfully to your tomcat server. Maybe you could provide us with some sort of error message?
What is the best way to build a java dynamic web project? How to
ensure each & every file of the project gets re-build?
Don't think you will find any "best way", but there's several options out there you can use. Fast google search for build tool
Maven
Gradle
Ant
This is just a few.

cannot create maven project in STS

I'm new to Java EE development and I heard that If I have to learn the Java EE then the Spring MVC is best choice to learn and get Command of.
After downloading STS 3.6 bundle I'm having some troubles/issues in creating Maven Project. My STEPS are
1- Create new project
2- Error Dialog

It appears that you either don't have Maven installed, or your IDE is not aware of the installation. For the former problem, have a look here. For the latter problem, view this page for IDE you are using:
Eclipse

I would also like to recommend to get started with Spring using the Spring Tool Suite by using Spring Boot and the guides at http://spring.io/guides. You can import those guides directly into STS and start from there.

I also face with this thing too, but I found a solution that just update Maven project by right click on project -> Maven-> Update Project... or (Alt+F5) then check on force to update as image below :
It works perfect for me.
NOTE** internet connection is required

I have created project using Spring Tool Suite IDE, with below navigation.
New -> Spring Starter Project
But outcome was always simple maven M2 project with error symbol.
After project build completion I have updated maven project with option "Force Update of Snapshots/Release".
It turned my project M2 project into M2S Project
Thanks

Using m2e plugin in a Dynamic Web Project

I have an existing Dynamic Web Project in Eclipse Indigo and the m2e plugin installed. In another version of my eclipse setup that I dont quite remember (my hdd crashed) I could just right click on the project -> Maven -> Enable Dependency Management.
This menu is gone for my Dynamic Web Project in my current eclipse version. Whats the way to go now? I tried right click on the project folder -> configure -> convert to maven project but that fails with errors.

M2Eclipse has migrated to an Eclipse project from Sonatype called m2e. Therefore in you Eclipse Indigo you have installed m2e whereas your old Maven projects in the older Eclipse version were created with M2Eclipse according to your right-click description. Now under normal circomstances everything should be working flawlessly and we wouldn't have this discussion. Unfortunately with the move of the project the namespace has changed from org.maven.ide.eclipse to org.eclipse.m2e.core and old Maven projects created with M2Eclipse are not immediately recognised as Maven projects in m2e. Here's a description of how to migrate your projects accordingly.

Erik, importing an existing maven project would let m2e discover and propose you to install m2e-wtp, the Maven Integration for Eclipse WTP plugin. Since you're starting from scratch, you should install m2e-wtp yourself (see https://github.com/sonatype/m2eclipse-wtp/wiki).
Now in order to quickstart a new mavenized web project, you should go to the "New Project" menu and choose new Maven project.
At this point, either you choose to create a "simple" project, in which case you need to select the "war" packaging on the following screen, or use a maven archetype, which will quickstart a new preconfigured web project, with the flavor you want (jsf, spring ...). The m2e-wtp wiki has links to help you get started.
Note : at this point Eclipse to Maven conversion is pretty much inexistant (only creates a bare pom.xml), that's why I recommend to create a maven project first. Hopefully, this should get better in the next m2e 1.1 (June 2012)

Choosing Netbeans project template or maven's project template

I'm little confused because of too many options when we take anything in java. I want to create a web application in java. whether i have create web application from 'java web' or 'maven' by creating new project in netbeans. I may use some archetypes in my future, but whether maven project has full IDE support from netbeans

I've been using Maven projects in NB 7 without a problem.