I have an old sound class and I want to change it from using applet.AudioClip to something modern so I can alter volume. How would I do this?

I'm developing a game in java with some cutesy little 8-bit sfx and I have this incredibly old sound class from 2011 made by notch. It's a good sound class, the only problem is that I can not change the volume of the sounds in it, I have tried multiple times to alter this but I always get really confusing errors and NullPointerExceptions. This is my sound class:

package com.teto.main;
import java.applet.Applet;
import java.applet.AudioClip;
public class Sound {
	public static final Sound levelUp = new Sound("/example.wav");
	private AudioClip clip;
	private Sound(String name) {
		try {
			clip = Applet.newAudioClip(Sound.class.getResource(name));
		} catch (Throwable e) {
			e.printStackTrace();
		}
	}
	public void play() {
		try {
			new Thread() {
				public void run() {
					clip.play();
				}
			}.start();
		} catch (Throwable er) {
			er.printStackTrace();
		}
	}
}

As you can see it is using java.applet.AudioClip which I don't think allows you to alter the volume of the sound effects you use with it. So that's why I want to figure out how to replace this with something better, so that I can still type Sound.soundname.play(); but I can also alter the volume.