java怎么随机产生a-z之间的字母

String chars = "abcdefghijklmnopqrstuvwxyz";System.out.println(chars.charAt((int)(Math.random() * 26)));
------解决方案--------------------
Java code
ArrayList list = new ArrayList();        for (char c = 'a'; c <= 'z'; c++) {            list.add(c);        }        String str = "";        for (int i = 0; i < 5; i++) {            int num = (int) (Math.random() * 26);            str = str + list.get(num);        }        System.out.println(str);