public class ListSort {?? ??? ?public void sort(){?? ??? ?//首先需要一個字母數字組合的字符串?? ??? ?String string = "qwertyuioplkjhgfdsazxcvbnmQWERTYUIOPLKJHGFDSAZXCVBNM0123456789";?? ??? ?//初始化字符串?? ??? ?StringBuilder newstring = new StringBuilder();?? ??? ?Random random = new Random();?? ??? ?List<StringBuilder> list = new ArrayList<StringBuilder>();?? ??? ?for(int i = 0;i < 10; i++){?? ??? ??? ?for(int j = 10;j > 0;j--){?? ??? ??? ??? ?int a = random.nextInt(61);?? ??? ??? ??? ?char c = string.charAt(a);?? ??? ??? ??? ?newstring = newstring.append(c);?? ??? ??? ?}?? ??? ??? ?list.add(newstring);?? ??? ??? ?newstring = new StringBuilder();?? ??? ?}?? ??? ?System.out.println("排序前---------------");?? ??? ?for(StringBuilder string2:list){?? ??? ??? ?System.out.println(string2);?? ??? ?}?? ??? ?System.out.println("排序后---------------");?? ??? ?Collections.sort(list);?? ??? ?for(StringBuilder string2:list){?? ??? ??? ?System.out.println(string2);?? ??? ?}?? ?}?? ?public static void main(String[] args) {?? ??? ?// TODO Auto-generated method stub?? ??? ?ListSort ls = new ListSort();?? ??? ?ls.sort();?? ?}}