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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 Aug 22 02:03:57 EDT 2002 --><TITLE>Marine Biology Simulation: Class DarterFish</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="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="overview-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</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><b>AP® Computer Science Marine Biology Simulation</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="BoundedEnv.html"><B>PREV CLASS</B></A> <A HREF="Debug.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="DarterFish.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>Class DarterFish</H2><PRE>java.lang.Object | +--<A HREF="Fish.html">Fish</A> | +--<B>DarterFish</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="Locatable.html">Locatable</A></DD></DL><HR><DL><DT>public class <B>DarterFish</B><DT>extends <A HREF="Fish.html">Fish</A></DL><P>AP® Computer Science Marine Biology Simulation:<br> The <code>DarterFish</code> class represents a fish in the Marine Biology Simulation that darts forward two spaces if it can, moves forward one space if it can't move two, and reverses direction (without moving) if it cannot move forward. It can only "see" an empty location two cells away if the cell in between is empty also. In other words, if both the cell in front of the darter and the cell in front of that cell are empty, the darter fish will move forward two spaces. If only the cell in front of the darter is empty, it will move there. If neither forward cell is empty, the fish will turn around, changing its direction but not its location. <p> <code>DarterFish</code> objects inherit instance variables and much of their behavior from the <code>Fish</code> class. <p> The <code>DarterFish</code> class is copyright© 2002 College Entrance Examination Board (www.collegeboard.com).<P><DL><DT><B>Version: </B><DD>1 July 2002</DD></DL><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="DarterFish.html#DarterFish(Environment, Location)">DarterFish</A></B>(<A HREF="Environment.html">Environment</A> env, <A HREF="Location.html">Location</A> loc)</CODE><BR> Constructs a darter fish at the specified location in a given environment.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="DarterFish.html#DarterFish(Environment, Location, Direction)">DarterFish</A></B>(<A HREF="Environment.html">Environment</A> env, <A HREF="Location.html">Location</A> loc, <A HREF="Direction.html">Direction</A> dir)</CODE><BR> Constructs a darter fish at the specified location and direction in a given environment.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="DarterFish.html#DarterFish(Environment, Location, Direction, java.awt.Color)">DarterFish</A></B>(<A HREF="Environment.html">Environment</A> env, <A HREF="Location.html">Location</A> loc, <A HREF="Direction.html">Direction</A> dir, java.awt.Color col)</CODE><BR> Constructs a darter fish of the specified color at the specified location and direction.</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>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="DarterFish.html#generateChild(Location)">generateChild</A></B>(<A HREF="Location.html">Location</A> loc)</CODE><BR> Creates a new darter fish.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="DarterFish.html#move()">move</A></B>()</CODE><BR> Moves this fish in its environment.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected <A HREF="Location.html">Location</A></CODE></FONT></TD><TD><CODE><B><A HREF="DarterFish.html#nextLocation()">nextLocation</A></B>()</CODE><BR> Finds this fish's next location.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_Fish"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class <A HREF="Fish.html">Fish</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="Fish.html#act()">act</A>, <A HREF="Fish.html#breed()">breed</A>, <A HREF="Fish.html#changeDirection(Direction)">changeDirection</A>, <A HREF="Fish.html#changeLocation(Location)">changeLocation</A>, <A HREF="Fish.html#color()">color</A>, <A HREF="Fish.html#die()">die</A>, <A HREF="Fish.html#direction()">direction</A>, <A HREF="Fish.html#emptyNeighbors()">emptyNeighbors</A>, <A HREF="Fish.html#environment()">environment</A>, <A HREF="Fish.html#id()">id</A>, <A HREF="Fish.html#isInEnv()">isInEnv</A>, <A HREF="Fish.html#location()">location</A>, <A HREF="Fish.html#randomColor()">randomColor</A>, <A HREF="Fish.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.Object</B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Constructor Detail</B></FONT></TD></TR></TABLE><A NAME="DarterFish(Environment, Location)"><!-- --></A><H3>DarterFish</H3><PRE>public <B>DarterFish</B>(<A HREF="Environment.html">Environment</A> env, <A HREF="Location.html">Location</A> loc)</PRE><DL><DD>Constructs a darter fish at the specified location in a given environment. This darter is colored yellow. (Precondition: parameters are non-null; <code>loc</code> is valid for <code>env</code>.)<DD><DL><DT><B>Parameters:</B><DD><CODE>env</CODE> - environment in which fish will live<DD><CODE>loc</CODE> - location of the new fish in <code>env</code></DL></DD></DL><HR><A NAME="DarterFish(Environment, Location, Direction)"><!-- --></A><H3>DarterFish</H3><PRE>public <B>DarterFish</B>(<A HREF="Environment.html">Environment</A> env, <A HREF="Location.html">Location</A> loc, <A HREF="Direction.html">Direction</A> dir)</PRE><DL><DD>Constructs a darter fish at the specified location and direction in a given environment. This darter is colored yellow. (Precondition: parameters are non-null; <code>loc</code> is valid for <code>env</code>.)<DD><DL><DT><B>Parameters:</B><DD><CODE>env</CODE> - environment in which fish will live<DD><CODE>loc</CODE> - location of the new fish in <code>env</code><DD><CODE>dir</CODE> - direction the new fish is facing</DL></DD></DL><HR><A NAME="DarterFish(Environment, Location, Direction, java.awt.Color)"><!-- --></A><H3>DarterFish</H3><PRE>public <B>DarterFish</B>(<A HREF="Environment.html">Environment</A> env, <A HREF="Location.html">Location</A> loc, <A HREF="Direction.html">Direction</A> dir, java.awt.Color col)</PRE><DL><DD>Constructs a darter fish of the specified color at the specified location and direction. (Precondition: parameters are non-null; <code>loc</code> is valid for <code>env</code>.)<DD><DL><DT><B>Parameters:</B><DD><CODE>env</CODE> - environment in which fish will live<DD><CODE>loc</CODE> - location of the new fish in <code>env</code><DD><CODE>dir</CODE> - direction the new fish is facing<DD><CODE>col</CODE> - color of the new fish</DL></DD></DL><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Method Detail</B></FONT></TD></TR></TABLE><A NAME="generateChild(Location)"><!-- --></A><H3>generateChild</H3><PRE>protected void <B>generateChild</B>(<A HREF="Location.html">Location</A> loc)</PRE><DL><DD>Creates a new darter fish.<DD><DL><DT><B>Overrides:</B><DD><CODE><A HREF="Fish.html#generateChild(Location)">generateChild</A></CODE> in class <CODE><A HREF="Fish.html">Fish</A></CODE></DL></DD><DD><DL><DT><B>Parameters:</B><DD><CODE>loc</CODE> - location of the new fish</DL></DD></DL><HR><A NAME="move()"><!-- --></A><H3>move</H3><PRE>protected void <B>move</B>()</PRE><DL><DD>Moves this fish in its environment. A darter fish darts forward (as specified in <code>nextLocation</code>) if possible, or reverses direction (without moving) if it cannot move forward.<DD><DL><DT><B>Overrides:</B><DD><CODE><A HREF="Fish.html#move()">move</A></CODE> in class <CODE><A HREF="Fish.html">Fish</A></CODE></DL></DD></DL><HR><A NAME="nextLocation()"><!-- --></A><H3>nextLocation</H3><PRE>protected <A HREF="Location.html">Location</A> <B>nextLocation</B>()</PRE><DL><DD>Finds this fish's next location. A darter fish darts forward two spaces if it can, otherwise it tries to move forward one space. A darter fish can only move to empty locations, and it can only move two spaces forward if the intervening space is empty. If the darter fish cannot move forward, <code>nextLocation</code> returns the fish's current location.<DD><DL><DT><B>Overrides:</B><DD><CODE><A HREF="Fish.html#nextLocation()">nextLocation</A></CODE> in class <CODE><A HREF="Fish.html">Fish</A></CODE></DL></DD><DD><DL><DT><B>Returns:</B><DD>the next location for this fish</DL></DD></DL><!-- ========= END OF CLASS DATA ========= --><HR><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_bottom"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="overview-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</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><b>AP® Computer Science Marine Biology Simulation</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="BoundedEnv.html"><B>PREV CLASS</B></A> <A HREF="Debug.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="DarterFish.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><i>Copyright© 2002 College Entrance Examination Board</i></BODY></HTML>⌨️ 快捷键说明
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