void?testSort(){
????List<String>strings=new?ArrayList<String>();
????String?st="qwerasdfzxcvtyuighjkbnmopl1234567890QWERASDFZXCVTYUIGHJKBNMOPL";
????Random?random=new?Random();
????for(int?i=0;i<10;)?{
????????StringBuilder?sb=new?StringBuilder();
????????int?k=random.nextInt(10);
????????for(int?j=0;j<=k;j++)?{
????????????st.append(cr.charAt(random.nextInt(cr.length())));
????????}
????????if(strings.contains(sb.toString()))?{				
????????continue;			
????????}			
????????strings.add(sb.toString());			
????????i++;
????????
????}
????System.out.println("------排序前----------");		
????for?(String?string?:?strings)?{			
????System.out.println(string);		
????}
????Collections.sort(strings);		
????System.out.println("------排序后----------");		
????for?(String?string?:?strings)?{			
????System.out.println(string);		
????}
}