csdn技术中心 java集合框架(三).htm

来自「javn的Java书籍JAVA集合框架.rar我看过了是很有帮助的」· HTM 代码 · 共 847 行 · 第 1/5 页

            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">null</SPAN></CODE><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">。但是，您不能把</SPAN><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Map</SPAN></CODE><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">作为一个键或值添加给自身。</SPAN><CODE><SPAN 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Courier New'">』</SPAN></CODE><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-bidi-font-family: 'Times New Roman'"><o:p></o:p></SPAN></CODE></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: -21pt; tab-stops: list 21.0pt; mso-list: l12 level1 lfo50"><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">(2)<SPAN 
            style="FONT: 7pt 'Times New Roman'">&nbsp; </SPAN></SPAN><SPAN 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">查询操作：</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"><o:p></o:p></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt"><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Object 
            get(Object key)</SPAN></CODE><SPAN lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">: </SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">获得与关键字</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">key</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">相关的值，并且返回与关键字</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">key</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">相关的对象，如果没有在该映像中找到该关键字，则返回</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">null<o:p></o:p></SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">boolean 
            containsKey(Object key)</SPAN></CODE><SPAN lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">: </SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">判断映像中是否存在关键字</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">key<o:p></o:p></SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">boolean 
            containsValue(Object value)</SPAN></CODE><SPAN lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">: </SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">判断映像中是否存在值</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">value<o:p></o:p></SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt"><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">int 
            size()</SPAN></CODE><SPAN lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">: </SPAN><SPAN 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">返回当前映像中映射的数量</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"><o:p></o:p></SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Courier">boolean 
            isEmpty()</SPAN></CODE><SPAN lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"> 
            </SPAN><SPAN 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">：判断映像中是否有任何映射</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"><o:p></o:p></SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: -21pt; tab-stops: list 21.0pt; mso-list: l12 level1 lfo50"><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">(3)<SPAN 
            style="FONT: 7pt 'Times New Roman'">&nbsp; </SPAN></SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">视图操作</SPAN><SPAN 
            style="FONT-SIZE: 10pt; mso-bidi-font-size: 12.0pt"> </SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">处理映像中键</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">/</SPAN><SPAN 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">值对组</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"><o:p></o:p></SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Set 
            keySet()</SPAN></CODE><SPAN lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">: </SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">返回映像中所有关键字的视图集</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Courier New'">『</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">因为映射中键的集合必须是唯一的，您用</SPAN><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Set</SPAN></CODE><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">支持。</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Courier New'">你还可以从视图中删除元素，同时，关键字和它相关的值将从源映像中被删除，但是你不能添加任何元素。』</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Collection 
            values()</SPAN></CODE><SPAN lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">:</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">返回映像中所有值的视图集</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Courier New'">『</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">因为映射中值的集合不是唯一的，您用</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Collection</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">支持。</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Courier New'">你还可以从视图中删除元素，同时，值和它的关键字将从源映像中被删除，但是你不能添加任何元素。』</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Set 
            entrySet()</SPAN></CODE><SPAN lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">: </SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">返回</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Map.Entry</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">对象的视图集，即映像中的关键字</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">/</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">值对</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Courier New'">『</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">因为映射是唯一的，您用</SPAN><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Set</SPAN></CODE><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">支持。</SPAN><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Courier New'">你还可以从视图中删除元素，同时，这些元素将从源映像中被删除，但是你不能添加任何元素。』</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B><SPAN lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">4.1.</SPAN></B><B><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt"> 
            Map.Entry</SPAN></B><B><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">接口</SPAN></B><B><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体"><o:p></o:p></SPAN></B></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Map</SPAN></CODE><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">的</SPAN><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">entrySet()</SPAN></CODE><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">方法返回一个实现</SPAN><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Map.Entry</SPAN></CODE><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">接口的对象集合。集合中每个对象都是底层</SPAN><CODE><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体">Map</SPAN></CODE><SPAN 
            style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">中一个特定的键<SPAN 
            lang=EN-US>/值对。</SPAN></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" 
            align=center><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体"><SPAN 
            lang=EN-US><o:p><IMG alt="" hspace=0 
            src="CSDN技术中心 Java集合框架(三).files/CSDN_Dev_Image_2003-12-112327302.jpg" 
            align=baseline border=0></o:p></SPAN></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"