package?imooc.com;

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

public?class?RandomString?{
	
	public?void?getRandomString(int?length){
		
		/**?
		?*?根據輸入的字符串長度，實現隨機生成字符串
		?*?當字符串不重復時，添加到list
		?*?打印添加成功的List
		?*??Collection排序后打印
		?*/
		
		//作為字符串的字符庫
		String?base="qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890";
		
		List?<String>?stringList=new?ArrayList<String>();
		
		Random?random=new?Random();
		//開始隨機添加字符串
		for(int?j=0;j<10;j++){
			StringBuffer?s=new?StringBuffer();
			do{
				
				for(int?i=0;i<length;i++){
		//開始隨機添加字符
					int?getSeq=random.nextInt(base.length());
					s.append(base.charAt(getSeq));
					}
		}while(stringList.contains(s.toString()));
			stringList.add(s.toString());
			System.out.println("將要添加："+s);
		}
		
		System.out.println("----------排序前---------");
		
		for?(String?string?:?stringList)?{
			System.out.println("元素："+string);
		}
		
		//字符串排序啦
		Collections.sort(stringList);
		
		System.out.println("----------排序后---------");
		for?(String?string?:?stringList)?{
			System.out.println("元素："+string);
		}
		
	}

	public?static?void?main(String[]?args)?{
		//?TODO?Auto-generated?method?stub
		//創建輸入的Scanner類
		
		Scanner?console=?new?Scanner(System.in);
		
		System.out.println("請輸入隨機生成的字符串長度：");
		int?length=console.nextInt();
		
		RandomString?stringRand=new?RandomString();
		stringRand.getRandomString(length);

	}

}