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
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style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">如果想跟踪添加给</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">HashSet</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">的元素的顺序，</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">LinkedHashSet</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">实现会有帮助。</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">LinkedHashSet</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">的迭代器按照元素的插入顺序来访问各个元素。它提供了一个可以快速访问各个元素的有序集合。同时，它也增加了实现的代价，因为哈希表元中的各个元素是通过双重链接式列表链接在一起的。</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt"><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: l59 level1 lfo45"><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">(1)<SPAN
style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">LinkedHashSet():
</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">构建一个空的链接式哈希集</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 20.8pt; TEXT-INDENT: -20.8pt"><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">(2)<SPAN
style="mso-tab-count: 1"> </SPAN>LinkedHashSet(Collection c):
</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">构建一个链接式哈希集，并且添加集合</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">c</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">中所有元素</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">(3)<SPAN
style="mso-tab-count: 1"> </SPAN>LinkedHashSet(int initialCapacity):
</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">构建一个拥有特定容量的空链接式哈希集</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">(4)<SPAN
style="mso-tab-count: 1"> </SPAN>LinkedHashSet(int initialCapacity,
float loadFactor): </SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">构建一个拥有特定容量和加载因子的空链接式哈希集。</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">LoadFactor</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">是</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">0.0</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">至</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt">1.0</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">之间的一个数</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt"><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-size: 12.0pt">『为优化</SPAN><CODE><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">HashSet</SPAN></CODE><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">空间的使用，您可以调优初始容量和负载因子。</SPAN><CODE><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体">TreeSet</SPAN></CODE><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">不包含调优选项，因为树总是平衡的。』</SPAN><B><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana"><o:p></o:p></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B><SPAN lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">4.</SPAN></B><B><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt">
Map</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><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt"><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">Map</SPAN></CODE><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">接口不是</SPAN><CODE><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Collection</SPAN></CODE><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">接口的继承。</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Map</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">接口用于维护键<SPAN
lang=EN-US>/值对</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">(key/value
pairs)</SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">。该接口描述了从不重复的键到值的映射。<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"
align=center><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体"><v:shapetype id=_x0000_t75
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path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"><v:stroke
joinstyle="miter"></v:stroke><v:formulas><v:f
eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f
eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f
eqn="prod @2 1 2"></v:f><v:f
eqn="prod @3 21600 pixelWidth"></v:f><v:f
eqn="prod @3 21600 pixelHeight"></v:f><v:f
eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f
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eqn="sum @10 21600 0"></v:f></v:formulas><v:path o:extrusionok="f"
gradientshapeok="t" o:connecttype="rect"></v:path><o:lock
v:ext="edit"
aspectratio="t"></o:lock></v:shapetype><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"
align=center><CODE><SPAN lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体"><IMG
alt="" hspace=0
src="CSDN技术中心 Java集合框架(三).files/CSDN_Dev_Image_2003-12-112327300.jpg"
align=baseline border=0></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"><CODE><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体">(1)<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></CODE><CODE><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'; mso-bidi-font-family: 'Times New Roman'">添加、删除操作：</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"><CODE><I><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Object
put(Object key, Object value)</SPAN></I></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'">将互相关联的一个关键字与一个值放入该映像。如果该关键字已经存在，那么与此关键字相关的新值将取代旧值。方法返回关键字的旧值，如果关键字原先并不存在，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><I><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">Object
remove(Object key)</SPAN></I></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'">从映像中删除与</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'">相关的映射</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><I><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">void
putAll(Map t)</SPAN></I></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'">将来自特定映像的所有元素添加给该映像</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><I><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">void
clear()</SPAN></I></CODE><CODE><SPAN lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体">:
</SPAN></CODE><CODE><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-family: 'Courier New'">从映像中删除所有映射</SPAN></CODE><CODE><SPAN
lang=EN-US
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'; mso-fareast-font-family: 宋体"><o:p></o:p></SPAN></CODE></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><CODE><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Courier New'">『</SPAN></CODE><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体">键和值都可以为</SPAN><CODE><SPAN
lang=EN-US
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