package?cn.itcast.demotest;

public?class?HomeWork04?{
	public?static?void?main（String[]?args）?{

		/*
		?*?4、（1）打印由7，8，9三個數(shù)組組成的三位數(shù)，要求該三位數(shù)中任意兩位數(shù)字不能相同?（2）打印格式最后的三位數(shù)字以空格分隔，如789
		?*?798?879?897?978?987
		?*/
		//?我發(fā)現(xiàn)每一位數(shù)都是7-?9?的數(shù)，并且在這個三位數(shù)沒有重復
		StringBuilder?sb?=?new?StringBuilder（）;
		for?（int?x?=?7;?x?<=?9;?x++）?{
			//?最外層的數(shù)
			for?（int?y?=?7;?y?<=?9;?y++）?{
				//?第二個數(shù)
				for?（int?z?=?7;?z?<=?9;?z++）?{
					//?第三個數(shù)
					if?（x?!=?y?&&?x?!=?z?&&?y?!=?z）?{
						sb.append（x?+?““?+?y?+?z+“?“）;
					}
				}
			}
		}
		System.out.println（sb.toString（））;

	}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-11-23?11:58??所有經(jīng)典題目\
?????文件?????????679??2016-11-10?22:59??所有經(jīng)典題目\789不重復的數(shù).java
?????目錄???????????0??2016-11-23?11:58??所有經(jīng)典題目\IO\
?????文件????????1179??2016-09-26?09:40??所有經(jīng)典題目\IO\Io按格式打印（有難度）.java
?????目錄???????????0??2016-11-23?11:58??所有經(jīng)典題目\IO\一點心得\
?????文件?????????539??2016-11-22?23:41??所有經(jīng)典題目\IO\一點心得\心得.txt
?????文件?????????837??2016-11-09?08:07??所有經(jīng)典題目\IO\不死神兔.java
?????文件????????1417??2016-09-27?14:33??所有經(jīng)典題目\IO\拷貝指定文件到指定目錄下.java
?????文件????????2190??2016-09-27?09:34??所有經(jīng)典題目\IO\拷貝文件夾.java
?????文件????????1319??2016-09-28?23:12??所有經(jīng)典題目\IO\轉(zhuǎn)化流（注意理解亂碼的原因）.java
?????文件?????????758??2016-11-02?17:18??所有經(jīng)典題目\一個類初始化過程復雜版.java
?????文件?????????611??2016-11-01?15:55??所有經(jīng)典題目\一個類的初始化過程簡單版.java
?????目錄???????????0??2016-11-23?11:58??所有經(jīng)典題目\產(chǎn)生隨機數(shù)\
?????目錄???????????0??2016-11-23?11:58??所有經(jīng)典題目\產(chǎn)生隨機數(shù)\一點心得\
?????文件?????????319??2016-11-22?23:45??所有經(jīng)典題目\產(chǎn)生隨機數(shù)\一點心得\心得.txt
?????文件????????2355??2016-11-22?09:34??所有經(jīng)典題目\產(chǎn)生隨機數(shù)\上一期點召題（產(chǎn)生不重復的數(shù)字+StringBuilder）.java
?????文件????????1618??2016-11-22?18:59??所有經(jīng)典題目\產(chǎn)生隨機數(shù)\上一期點召題（產(chǎn)生重復數(shù)字）.java
?????文件?????????972??2016-11-14?23:13??所有經(jīng)典題目\產(chǎn)生隨機數(shù)\產(chǎn)生不重復隨機數(shù)并過濾.java
?????文件????????2044??2016-11-13?22:09??所有經(jīng)典題目\產(chǎn)生隨機數(shù)\產(chǎn)生隨機數(shù)（經(jīng)典）.java
?????文件?????????972??2016-11-14?23:13??所有經(jīng)典題目\產(chǎn)生隨機數(shù)\產(chǎn)生隨機數(shù)并過濾.java
?????目錄???????????0??2016-11-23?11:58??所有經(jīng)典題目\字符串\
?????文件?????????899??2016-09-16?12:16??所有經(jīng)典題目\字符串\replace方法和統(tǒng)計大串中小串（不錯的題）.java
?????文件?????????657??2016-07-09?18:53??所有經(jīng)典題目\字符串\String和StringBuidler參數(shù)傳遞.java
?????文件????????1137??2016-09-16?10:20??所有經(jīng)典題目\字符串\String經(jīng)典考題.java
?????文件????????2225??2016-11-06?21:50??所有經(jīng)典題目\字符串\判斷字符串是否對稱.java
?????文件?????????969??2016-09-21?12:04??所有經(jīng)典題目\字符串\字符串goodgood.java
?????文件????????1498??2016-11-10?22:52??所有經(jīng)典題目\字符串\數(shù)組+字符串倒騰的題（比較不錯）.java
?????文件????????1931??2016-09-16?12:16??所有經(jīng)典題目\字符串\替換字符end結束版.java
?????文件????????1001??2016-08-27?14:54??所有經(jīng)典題目\字符串\統(tǒng)計大串小串的比較騷氣的兩種做法.java
?????文件????????1518??2016-11-07?23:48??所有經(jīng)典題目\日期題（此題做出來日期登峰造極）.java
?????目錄???????????0??2016-11-23?11:58??所有經(jīng)典題目\玩List加字符串的\
............此處省略19個文件信息