有没有办法让它更小，我尝试使用 for 循环，但无法为每个可能的类型创建一个随机实例。

Random randFireworkEffect = new Random(5);
switch(randFireworkEffect.nextInt()) {
    case 0:
        e = FireworkEffect.builder().flicker(true).withColor(c).withFade(c).with(Type.BALL).trail(true).build();
        break;
    case 1:
        e = FireworkEffect.builder().flicker(true).withColor(c).withFade(c).with(Type.BALL_LARGE).trail(true).build();
        break;
    case 2:
         e = FireworkEffect.builder().flicker(true).withColor(c).withFade(c).with(Type.BURST).trail(true).build();
        break;
    case 3:
         e = FireworkEffect.builder().flicker(true).withColor(c).withFade(c).with(Type.CREEPER).trail(true).build();
        break;
    case 4:
         e = FireworkEffect.builder().flicker(true).withColor(c).withFade(c).with(Type.STAR).trail(true).build();
        break;
}

回答

Random randFireworkEffect = new Random();
e = FireworkEffect.builder()
        .flicker(true)
        .withColor(c)
        .withFade(c)
        .with(FireworkEffect.Type.values([randFireworkEffect.nextInt(5)])
        .trail(true)
        .build();