public?void?testStringSort(){
????List<String>?string?=?new?ArrayList<>();
????StringBuilder?sb?=?new?StringBuilder();
????Random?random?=?new?Random();
????String?str?=?"ancdefjhigklmnopqrstuvwxyz0123456789ABCDEFGHIGKLMNOPQRSTUVWXYZ";
????for(int?i?=?0;i<10;i++){
????????sb.delete(0,?sb.length());
????????for(int?j?=?0;j<10;j++){
????????????int?number?=?random.nextInt(62);
????????????sb.append(str.charAt(number));
????????}
????????if(!(string.contains(sb))){
????????????string.add(sb.toString());
????????????System.out.println("新添加字符串："+sb);
????????}else{
????????????System.out.println("已有此字符串");
????????}
????}
????System.out.println("********打印前*********");
????for?(String?strings:string)?{
????????System.out.print(strings);
????????System.out.println();
????}
????Collections.sort(string);
????System.out.println("********打印后*********");
????for?(String?strings:string)?{
????????System.out.print(strings);
????????System.out.println();
????}

}