jkost.github.io/Courses/Mathesis/Intro2ProgrammingWithJava/Week4/4.1-Inheritance/sandbox/interfaces2.html at master · jkost/jkost.github.io · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <link rel="stylesheet" href="https://javaalmanac.io/almanac.min.css">
</head>
<body>

<div class="content" id="content">

<sandbox version="java17" mainclass="Main" preview="true" v-cloak>
<sandbox-source name="Main.java">
interface X {
    default String message() {
        return "Hallo X";
    }
}

interface Y {
    default String message() {
        return "Hallo Y";
    }
}

class XY implements X, Y {
    public String message() {
        return X.super.message();
    }
}

public class Main {
  public static void main(String[] args) {
	XY xy = new XY();
	System.out.println(xy.message());
  }
}</sandbox-source>
</sandbox>
</div>
<script src="https://javaalmanac.io/app/sandbox-bundle.js"></script>
<script>new Vue({ el: '#content' })</script>
</body>
</html>