使用字符串值作为变量名称
问题描述：
可以使用String作为变量名吗..就像在这个例子中一样 -
Is it possible to use String as a variable name.. like in this example -
String musicPlaying = "music2";
Music music1 = new Music("blaalla");
Music music2 = new Music("blalala");
Music music3 = new Music("balaada");
if(!musicPlaying.stillPlaying) { // As you can see i am using string as a variable name.
changeMusic();
}
答
你可以做的是将这些值关联（映射）到Music对象。以下是示例：
What you can do is by associating (mapping) those values to the Music object. Here is example:
Map<String, Music> musics = new HashMap<>();
String musicPlaying = "music2";
musics.put("music1", new Music("blaalla"));
musics.put("music2", new Music("blalala"));
musics.put("music3", new Music("balaada"));
if(!musics.get(musicPlaying).stillPlaying) { // As you can see i am using string as a variable name.
changeMusic();
}