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: Class Random
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DataStructures</FONT>
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Class Random</H2>
<PRE>
java.lang.Object
|
+--<B>DataStructures.Random</B>
</PRE>
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<DL>
<DT>public class <B>Random</B><DT>extends java.lang.Object</DL>
<P>
Random number class, using a 31-bit linear congruential generator. Note that java.util contains a class Random, so watch out for name conflicts.
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<TD><CODE><B><A HREF="../DataStructures/Random.html#Random()">Random</A></B>()</CODE>
<BR>
Construct this Random object with initial state obtained from system clock.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../DataStructures/Random.html#Random(int)">Random</A></B>(int initialValue)</CODE>
<BR>
Construct this Random object with specified initial state.</TD>
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<CODE>static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../DataStructures/Random.html#main(java.lang.String[])">main</A></B>(java.lang.String[] args)</CODE>
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<CODE>static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../DataStructures/Random.html#permute(java.lang.Object[])">permute</A></B>(java.lang.Object[] a)</CODE>
<BR>
Randomly rearrange an array.</TD>
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<CODE> double</CODE></FONT></TD>
<TD><CODE><B><A HREF="../DataStructures/Random.html#random0_1()">random0_1</A></B>()</CODE>
<BR>
Return a pseudorandom double in the open range 0..1 and change the internal state.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../DataStructures/Random.html#randomInt()">randomInt</A></B>()</CODE>
<BR>
Return a pseudorandom int, and change the internal state.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../DataStructures/Random.html#randomInt(int, int)">randomInt</A></B>(int low, int high)</CODE>
<BR>
Return an int in the closed range [low,high], and change the internal state.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../DataStructures/Random.html#randomIntWRONG()">randomIntWRONG</A></B>()</CODE>
<BR>
Return a pseudorandom int, and change the internal state.</TD>
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<CODE> long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../DataStructures/Random.html#randomLong(long, long)">randomLong</A></B>(long low, long high)</CODE>
<BR>
Return an long in the closed range [low,high], and change the internal state.</TD>
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<TD><B>Methods inherited from class java.lang.Object</B></TD>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="Random()"><!-- --></A><H3>
Random</H3>
<PRE>
public <B>Random</B>()</PRE>
<DL>
<DD>Construct this Random object with initial state obtained from system clock.</DL>
<HR>
<A NAME="Random(int)"><!-- --></A><H3>
Random</H3>
<PRE>
public <B>Random</B>(int initialValue)</PRE>
<DL>
<DD>Construct this Random object with specified initial state.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>initialValue</CODE> - the initial state.</DL>
</DD>
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<A NAME="randomInt()"><!-- --></A><H3>
randomInt</H3>
<PRE>
public int <B>randomInt</B>()</PRE>
<DL>
<DD>Return a pseudorandom int, and change the internal state.<DD><DL>
<DT><B>Returns:</B><DD>the pseudorandom int.</DL>
</DD>
</DL>
<HR>
<A NAME="randomIntWRONG()"><!-- --></A><H3>
randomIntWRONG</H3>
<PRE>
public int <B>randomIntWRONG</B>()</PRE>
<DL>
<DD>Return a pseudorandom int, and change the internal state. DOES NOT WORK.<DD><DL>
<DT><B>Returns:</B><DD>the pseudorandom int.</DL>
</DD>
</DL>
<HR>
<A NAME="random0_1()"><!-- --></A><H3>
random0_1</H3>
<PRE>
public double <B>random0_1</B>()</PRE>
<DL>
<DD>Return a pseudorandom double in the open range 0..1 and change the internal state.<DD><DL>
<DT><B>Returns:</B><DD>the pseudorandom double.</DL>
</DD>
</DL>
<HR>
<A NAME="randomInt(int, int)"><!-- --></A><H3>
randomInt</H3>
<PRE>
public int <B>randomInt</B>(int low, int high)</PRE>
<DL>
<DD>Return an int in the closed range [low,high], and change the internal state.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>low</CODE> - the minimum value returned.<DD><CODE>high</CODE> - the maximum value returned.<DT><B>Returns:</B><DD>the pseudorandom int.</DL>
</DD>
</DL>
<HR>
<A NAME="randomLong(long, long)"><!-- --></A><H3>
randomLong</H3>
<PRE>
public long <B>randomLong</B>(long low, long high)</PRE>
<DL>
<DD>Return an long in the closed range [low,high], and change the internal state.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>low</CODE> - the minimum value returned.<DD><CODE>high</CODE> - the maximum value returned.<DT><B>Returns:</B><DD>the pseudorandom long.</DL>
</DD>
</DL>
<HR>
<A NAME="permute(java.lang.Object[])"><!-- --></A><H3>
permute</H3>
<PRE>
public static final void <B>permute</B>(java.lang.Object[] a)</PRE>
<DL>
<DD>Randomly rearrange an array. The random numbers used depend on the time and day.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>a</CODE> - the array.</DL>
</DD>
</DL>
<HR>
<A NAME="main(java.lang.String[])"><!-- --></A><H3>
main</H3>
<PRE>
public static void <B>main</B>(java.lang.String[] args)</PRE>
<DL>
</DL>
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