package?com.tt;

import?java.util.Random;

class?Random?{
	String?str?=?“ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789“;

	Random?ran?=?new?Random（）;

	char[]?chr?=?str.toCharArray（）;

	int?chrlong?=?chr.length;

	String?rnumber?=?““;

	public?Random_number（）?{
	}

	public?String?randomNumber（int?n）?{
		int?k;
		for?（int?i?=?0;?i?			k?=?ran.nextInt（35）;
			if?（rnumber.indexOf（chr[k]）?==?-1）?{//?判讀驗證新生成的驗證碼是否與前面的重復
				//?System.out.println（chr[k]）;
				rnumber?=?rnumber?+?chr[k];
			}?else?{//?如果重復重新生成
				i--;
				continue;
			}
		}
		return?rnumber;
	}

}

?屬性????????????大小?????日期????時間???名稱
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?????文件????????628??2008-06-14?17:22??java實現驗證碼\Random.java

?????文件????????184??2008-06-14?16:43??java實現驗證碼\test.java

?????目錄??????????0??2008-06-14?17:22??java實現驗證碼

-----------?---------??----------?-----??----

??????????????????812????????????????????3