新人教育に もっと Rubyを！
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This document shows a simple Java program with a main method that prints the text "Hello, world!" to the console. The main method uses the println method of the System.out object to display the message. This is a common first program used to demonstrate a basic Java application.
![public class Hello {
public static void main(String[] args){
System.out.println("Hello, world!");
}
}
17](https://image.slidesharecdn.com/morerubyeducation-110719211642-phpapp01/85/Ruby-17-320.jpg)
