public?void?testSort3()?{
List<String>?stringList?=?new?ArrayList<String>();
Random?random?=?new?Random();
String?string?=?"1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
StringBuffer?sBuffer?=?new?StringBuffer();
for?(int?i?=?0;?i?<?10;?i++)?{
do?{
for?(int?j?=?1;?j?<=?random.nextInt(10);?j++)?{
sBuffer?=?sBuffer.append(string.charAt(random.nextInt(62)));
}
}?while?(stringList.contains(sBuffer)||stringList.contains(null));
String?s?=?sBuffer.toString();
stringList.add(s);
System.out.println("成功添加字符串："?+?s);
sBuffer.delete(0,?sBuffer.length());
}
System.out.println("------------------排序前-------------------");
for?(String?string1?:?stringList)?{
System.out.println("元素：'"?+?string1?+"'");
}
Collections.sort(stringList);
System.out.println("------------------排序后-------------------");
for?(String?string1?:?stringList)?{
System.out.println("元素：'"?+?string1?+"'");
}