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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Thu Apr 27 23:36:47 PDT 2000 --><TITLE>Java 2 Platform SE v1.3: Class AbstractSequentialList</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/AbstractSequentialList.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Std. Ed. v1.3</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../java/util/AbstractMap.html"><B>PREV CLASS</B></A> <A HREF="../../java/util/AbstractSet.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="AbstractSequentialList.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | <A HREF="#fields_inherited_from_class_java.util.AbstractList">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">java.util</FONT><BR>Class AbstractSequentialList</H2><PRE><A HREF="../../java/lang/Object.html">java.lang.Object</A> | +--<A HREF="../../java/util/AbstractCollection.html">java.util.AbstractCollection</A> | +--<A HREF="../../java/util/AbstractList.html">java.util.AbstractList</A> | +--<B>java.util.AbstractSequentialList</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../java/util/Collection.html">Collection</A>, <A HREF="../../java/util/List.html">List</A></DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../java/util/LinkedList.html">LinkedList</A></DD></DL><HR><DL><DT>public abstract class <B>AbstractSequentialList</B><DT>extends <A HREF="../../java/util/AbstractList.html">AbstractList</A></DL><P>This class provides a skeletal implementation of the <tt>List</tt> interface to minimize the effort required to implement this interface backed by a "sequential access" data store (such as a linked list). For random access data (such as an array), <tt>AbstractList</tt> should be used in preference to this class.<p> This class is the opposite of the <tt>AbstractList</tt> class in the sense that it implements the "random access" methods (<tt>get(int index)</tt>, <tt>set(int index, Object element)</tt>, <tt>set(int index, Object element)</tt>, <tt>add(int index, Object element)</tt> and <tt>remove(int index)</tt>) on top of the list's list iterator, instead of the other way around.<p> To implement a list the programmer needs only to extend this class and provide implementations for the <tt>listIterator</tt> and <tt>size</tt> methods. For an unmodifiable list, the programmer need only implement the list iterator's <tt>hasNext</tt>, <tt>next</tt>, <tt>hasPrevious</tt>, <tt>previous</tt> and <tt>index</tt> methods.<p> For a modifiable list the programmer should additionally implement the list iterator's <tt>set</tt> method. For a variable-size list the programmer should additionally implement the list iterator's <tt>remove</tt> and <tt>add</tt> methods.<p> The programmer should generally provide a void (no argument) and collection constructor, as per the recommendation in the <tt>Collection</tt> interface specification.<P><DL><DT><B>Since: </B><DD>1.2</DD><DT><B>See Also: </B><DD><A HREF="../../java/util/Collection.html"><CODE>Collection</CODE></A>, <A HREF="../../java/util/List.html"><CODE>List</CODE></A>, <A HREF="../../java/util/AbstractList.html"><CODE>AbstractList</CODE></A>, <A HREF="../../java/util/AbstractCollection.html"><CODE>AbstractCollection</CODE></A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="fields_inherited_from_class_java.util.AbstractList"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from class java.util.<A HREF="../../java/util/AbstractList.html">AbstractList</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../java/util/AbstractList.html#modCount">modCount</A></CODE></TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected </CODE></FONT></TD><TD><CODE><B><A HREF="../../java/util/AbstractSequentialList.html#AbstractSequentialList()">AbstractSequentialList</A></B>()</CODE><BR> Sole constructor.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/util/AbstractSequentialList.html#add(int, java.lang.Object)">add</A></B>(int index, <A HREF="../../java/lang/Object.html">Object</A> element)</CODE><BR> Inserts the specified element at the specified position in this list.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/util/AbstractSequentialList.html#addAll(int, java.util.Collection)">addAll</A></B>(int index, <A HREF="../../java/util/Collection.html">Collection</A> c)</CODE><BR> Inserts all of the elements in in the specified collection into this list at the specified position.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/lang/Object.html">Object</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/util/AbstractSequentialList.html#get(int)">get</A></B>(int index)</CODE><BR> Returns the element at the specified position in this list.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/util/Iterator.html">Iterator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/util/AbstractSequentialList.html#iterator()">iterator</A></B>()</CODE><BR> Returns an iterator over the elements in this list (in proper sequence).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>abstract <A HREF="../../java/util/ListIterator.html">ListIterator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/util/AbstractSequentialList.html#listIterator(int)">listIterator</A></B>(int index)</CODE><BR> Returns a list iterator over the elements in this list (in proper sequence).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/lang/Object.html">Object</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/util/AbstractSequentialList.html#remove(int)">remove</A></B>(int index)</CODE><BR> Removes the element at the specified position in this list.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/lang/Object.html">Object</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/util/AbstractSequentialList.html#set(int, java.lang.Object)">set</A></B>(int index, <A HREF="../../java/lang/Object.html">Object</A> element)</CODE><BR> Replaces the element at the specified position in this list with the specified element.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.util.AbstractList"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.util.<A HREF="../../java/util/AbstractList.html">AbstractList</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../java/util/AbstractList.html#add(java.lang.Object)">add</A>, <A HREF="../../java/util/AbstractList.html#clear()">clear</A>, <A HREF="../../java/util/AbstractList.html#equals(java.lang.Object)">equals</A>, <A HREF="../../java/util/AbstractList.html#hashCode()">hashCode</A>, <A HREF="../../java/util/AbstractList.html#indexOf(java.lang.Object)">indexOf</A>, <A HREF="../../java/util/AbstractList.html#lastIndexOf(java.lang.Object)">lastIndexOf</A>, <A HREF="../../java/util/AbstractList.html#listIterator()">listIterator</A>, <A HREF="../../java/util/AbstractList.html#removeRange(int, int)">removeRange</A>, <A HREF="../../java/util/AbstractList.html#subList(int, int)">subList</A></CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.util.AbstractCollection"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.util.<A HREF="../../java/util/AbstractCollection.html">AbstractCollection</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../java/util/AbstractCollection.html#addAll(java.util.Collection)">addAll</A>, <A HREF="../../java/util/AbstractCollection.html#contains(java.lang.Object)">contains</A>, <A HREF="../../java/util/AbstractCollection.html#containsAll(java.util.Collection)">containsAll</A>, <A HREF="../../java/util/AbstractCollection.html#isEmpty()">isEmpty</A>, <A HREF="../../java/util/AbstractCollection.html#remove(java.lang.Object)">remove</A>, <A HREF="../../java/util/AbstractCollection.html#removeAll(java.util.Collection)">removeAll</A>, <A HREF="../../java/util/AbstractCollection.html#retainAll(java.util.Collection)">retainAll</A>, <A HREF="../../java/util/AbstractCollection.html#size()">size</A>, <A HREF="../../java/util/AbstractCollection.html#toArray()">toArray</A>, <A HREF="../../java/util/AbstractCollection.html#toArray(java.lang.Object[])">toArray</A>, <A HREF="../../java/util/AbstractCollection.html#toString()">toString</A></CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.lang.<A HREF="../../java/lang/Object.html">Object</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../java/lang/Object.html#clone()">clone</A>, <A HREF="../../java/lang/Object.html#finalize()">finalize</A>, <A HREF="../../java/lang/Object.html#getClass()">getClass</A>, <A HREF="../../java/lang/Object.html#notify()">notify</A>, <A HREF="../../java/lang/Object.html#notifyAll()">notifyAll</A>, <A HREF="../../java/lang/Object.html#wait()">wait</A>, <A HREF="../../java/lang/Object.html#wait(long)">wait</A>, <A HREF="../../java/lang/Object.html#wait(long, int)">wait</A></CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.util.List"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from interface java.util.<A HREF="../../java/util/List.html">List</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../java/util/List.html#addAll(java.util.Collection)">addAll</A>, <A HREF="../../java/util/List.html#contains(java.lang.Object)">contains</A>, <A HREF="../../java/util/List.html#containsAll(java.util.Collection)">containsAll</A>, <A HREF="../../java/util/List.html#isEmpty()">isEmpty</A>, <A HREF="../../java/util/List.html#remove(java.lang.Object)">remove</A>, <A HREF="../../java/util/List.html#removeAll(java.util.Collection)">removeAll</A>, <A HREF="../../java/util/List.html#retainAll(java.util.Collection)">retainAll</A>, <A HREF="../../java/util/List.html#size()">size</A>, <A HREF="../../java/util/List.html#toArray()">toArray</A>, <A HREF="../../java/util/List.html#toArray(java.lang.Object[])">toArray</A></CODE></TD></TR></TABLE> <P>⌨️ 快捷键说明
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