如何使数字脱颖而出？

StreamTokenizer已过时，最好使用Scanner，这是您的问题的示例代码：

    String s = ".24 word -123";    Scanner fi = new Scanner(s);    //anything other than alphanumberic characters,     //comma, dot or negative sign is skipped    fi.useDelimiter("[^\p{Alnum},\.-]");     while (true) {        if (fi.hasNextInt()) System.out.println("Int: " + fi.nextInt());        else if (fi.hasNextDouble()) System.out.println("Double: " + fi.nextDouble());        else if (fi.hasNext()) System.out.println("word: " + fi.next());        else break;    }

如果要使用逗号作为浮点定界符，请使用

fi.useLocale(Locale.FRANCE);