Quick learning Java "Introduction?" Part 1 Building an environment

This page is written for private education.

Will IT Hijikata forever?

Will you always do the job of putting dandelions on top of sashimi? I came to the IT industry with hope, but what I'm doing is just routine work ... I only have the job of server monitoring and testers.

That's because you don't have the skills. Because there are many replacements for you.

Therefore, we must become human resources that cannot be replaced. The one without the code is not an engineer. Whether it's infrastructure or development, it doesn't change.

I have to hurry to learn Java

I won't explain why it's Java. First, beginners should read this. This is a very useful finding.


Did you read it?

Build a development environment

First, let's build a development environment. First, insert the JDK.

Download and install Java SE 9 from the following site. Standard is fine. http://www.oracle.com/technetwork/java/javase/downloads/jdk9-downloads-3848520.html


Next, prepare an integrated development environment for Eclipse. (Not when doing it with an editor and command line) http://mergedoc.osdn.jp/

Download Eclipse 4.7 Oxygen. Eclipse.PNG

You can download the Java one, and later add as many features as you like with the plugin, It's a waste of time to find out about it.

If you have money, this is also recommended. https://www.jetbrains.com/idea/

Thaw the dropped one with your favorite multi-archiver.

Start and set the development environment

First, let's create an environment where you can write a console program and execute it immediately.

I don't know in which environment to do it, so check it yourself and set it.

I don't know if I want to make a web app or Android. But the fact that you can't do anything without writing code remains the same, First of all, I will go on the console, and if I have a lot of time, I will write down that.

Output characters on the homework console

Allow me to execute the following code

public class Main {
    public static void main(String[] args) {
        System.out.println("Hello World!");

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