import?java.util.ArrayList;
import?java.util.Collections;
import?java.util.List;
import?java.util.Random;

public?class?RandomList?{

	public?String?RandomListTest()?{
		char?ascii;
		String?str?=?"";
		for?(int?i?=?0;?i?<=?new?Random().nextInt(10);?i++)?{
			ascii?=?(char)?new?Random().nextInt(128);
			while?((str.indexOf(ascii)?!=?-1)?||?!((""?+?ascii).matches("[0-9[a-zA-Z]]")))?{
				ascii?=?(char)?new?Random().nextInt(128);
			}
			str?+=?""?+?ascii;
		}
		return?str;
	}
	
	public?static?void?main(String[]?args)?{
		List<String>?list?=?new?ArrayList<String>();
		for?(int?i?=?0;?i?<?10;?i++)?{
			String?str?=?new?RandomList().RandomListTest();
			while?(list.indexOf(str)?!=?-1)?{
				str?=?new?RandomList().RandomListTest();
			}
			list.add(str);
		}
		System.out.println("----------------升序前----------------");
		for?(String?string?:?list)?{
			System.out.println(string);
		}
		Collections.sort(list);
		System.out.println("----------------升序后----------------");
		for?(String?string?:?list)?{
			System.out.println(string);
		}
	}
}