Hello, World!

/**
 * Fun fact:
 * My first HelloWorld ever didn't work because I wrote Void instead of void,
 * and the Windows Notepad was not that helpful, so I didn't notice for a while.
 */
public class HelloWorld {
    public static void main (String args[]) {
        System.out.println("Hello, World!");
    }
}

<script src="https://cdn.jsdelivr.net/npm/vue@2"></script>
<div id="app">
    {{ message }}
</div>

var app = new Vue({
    el: '#app',
    data: {
        message: 'Hello Vue!'
    }
});