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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 Fri Aug 23 13:18:11 EDT 2002 --><TITLE>: Class AbstractSet</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="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="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-all.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><a href=../copyright.html target=_top>© 1998-2002 McGraw-Hill</a></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../structure/AbstractQueue.html"><B>PREV CLASS</B></A> <A HREF="../structure/AbstractStack.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="AbstractSet.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | FIELD | <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">structure</FONT><BR>Class AbstractSet</H2><PRE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">java.lang.Object</A> | +--<A HREF="../structure/AbstractStructure.html">structure.AbstractStructure</A> | +--<B>structure.AbstractSet</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../structure/Set.html">Set</A>, <A HREF="../structure/Structure.html">Structure</A></DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../structure/SetList.html">SetList</A>, <A HREF="../structure/SetVector.html">SetVector</A></DD></DL><HR><DL><DT>public abstract class <B>AbstractSet</B><DT>extends <A HREF="../structure/AbstractStructure.html">AbstractStructure</A><DT>implements <A HREF="../structure/Set.html">Set</A></DL><P>Methods common to an Implementation of a set of elements irrespective of the underlying storage mechanism. As with the mathematical object, the elements of the set are not duplicated. No order is implied or enforced in this structure, but simple set operations such as intersection, union, difference, and subset are provided. <P> Example Usage: Given a list of students who completed a computer science thesis in the 2001-2002 academic year at Williams College and a list of graduating computer science majors who are continuing on to graduate school, we could determine which thesis students are planning to attend graduate school as follows: <P> <pre> public static void main(String[] argv){ //thesis students in the class of '02 String[] thesis = new String[]{"Doug", "Evan", "Feng"}; //students continuing on to grad school String[] grad = new String[]{"Doug", "Feng", "Lida"}; //instantiate our sets Set thesisSet = new <A HREF="../structure/SetVector.html#SetVector()"><CODE>SetVector.SetVector()</CODE></A>, gradSet = new <A HREF="../structure/SetVector.html#SetVector()"><CODE>SetVector.SetVector()</CODE></A>; //build sets up for(int i = 0; i < thesis.length; i++) thesisSet.<A HREF="../structure/Structure.html#add(java.lang.Object)"><CODE>add(thesis[i])</CODE></A>; for(int i = 0; i < grad.length; i++) gradSet.<A HREF="../structure/Structure.html#add(java.lang.Object)"><CODE>add(grad[i])</CODE></A>; //calculate the intersection of the two sets thesisSet.<A HREF="../structure/AbstractSet.html#retainAll(structure.Structure)"><CODE>retainAll(gradSet)</CODE></A>; System.out.println(thesisSet); } </pre><P><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== 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><CODE><B><A HREF="../structure/AbstractSet.html#AbstractSet()">AbstractSet</A></B>()</CODE><BR> </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="../structure/AbstractSet.html#addAll(structure.Structure)">addAll</A></B>(<A HREF="../structure/Structure.html">Structure</A> other)</CODE><BR> Union other set into this set.</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="../structure/AbstractSet.html#containsAll(structure.Structure)">containsAll</A></B>(<A HREF="../structure/Structure.html">Structure</A> other)</CODE><BR> Check to see if this set is contained in the other structure.</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="../structure/AbstractSet.html#removeAll(structure.Structure)">removeAll</A></B>(<A HREF="../structure/Structure.html">Structure</A> other)</CODE><BR> Computes the difference between this set and the other structure</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor">?? 快捷鍵說明
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