📄 全面接触java集合框架 -.htm
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style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">Java
2</SPAN><SPAN
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</SPAN><B><SPAN
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style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">1.Collection
</SPAN><SPAN
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style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt"> 用于表示任何对象或元素组。想要尽可能以常规方式处理一组元素时，就使用这一接口。</SPAN><SPAN
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style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">(1)
</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">单元素添加、删除操作：</SPAN><SPAN
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style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">boolean
add(Object o):</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">将对象添加给集合</SPAN><SPAN
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style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">boolean
remove(Object o): </SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">如果集合中有与</SPAN><SPAN
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style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">(2)
</SPAN><SPAN
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style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">int
size() </SPAN><SPAN
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style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">boolean
isEmpty() </SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">：判断集合中是否有任何元素</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt"><BR><BR></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt"> </SPAN><SPAN
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style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">boolean
contains(Object o) </SPAN><SPAN
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lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">o</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt"><BR><BR></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt"> </SPAN><SPAN
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style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">Iterator
iterator() </SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">：返回一个迭代器，用来访问集合中的各个元素</SPAN><SPAN
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lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">(3)
</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">组操作</SPAN><SPAN
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</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">：作用于元素组或整个集合</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt"><BR><BR></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt"> </SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">boolean
containsAll(Collection c): </SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">查找集合中是否含有集合</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">c
</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">中所有元素</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt"><BR><BR></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt"> </SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">boolean
addAll(Collection c) : </SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">将集合</SPAN><SPAN
lang=EN-US
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</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">中所有元素添加给该集合</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt"><BR><BR></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt"> </SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">void
clear(): </SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">删除集合中所有元素</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt"><BR><BR></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt"> </SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">void
removeAll(Collection c) : </SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">从集合中删除集合</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">c
</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">中的所有元素</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt"><BR><BR></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt"> </SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">void
retainAll(Collection c) : </SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: Arial; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 12.0pt">从集合中删除集合</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt; mso-bidi-font-size: 12.0pt">c
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