A program that helps when rendering java code?

I attended a conference where a moderator showed some Java 8 code examples in an application. I was looking for the name of that or similar application

The application compiles all the code samples and displays the output, but the main thing is that it doesn't have to write complete Java code It automatically handles imports and class definitions He can focus on the code he wants to show This makes it easy to create examples quickly

Editing; To clarify, this is not a complete ide It seems to be a program designed to quickly write and test short code examples For example, he wrote and displayed a for - each loop in Java 8 without any import or having to create a main class or any syntax

Solution

Check those integrated development environments:

> Eclipse > IntelliJ Idea > NetBeans

To improve your presentation, you can create templates and create the necessary code for you