Mi manual de algoritmos/version_maraton_nacional_2008/src/java/priority_queue.tex

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   3 {\ttfamily \raggedright {
   4 \noindent
   5 \mbox{}\textbf{\textcolor{RoyalBlue}{import}}\ java\textcolor{BrickRed}{.}util\textcolor{BrickRed}{.*;} \\
   6 \mbox{} \\
   7 \mbox{} \\
   8 \mbox{}\textbf{\textcolor{Blue}{class}}\ Item\ \textbf{\textcolor{Blue}{implements}}\ Comparable\textcolor{BrickRed}{$<$}Item\textcolor{BrickRed}{$>$}\textcolor{Red}{\{} \\
   9 \mbox{}\ \ \ \ \textcolor{ForestGreen}{int}\ destino\textcolor{BrickRed}{,}\ peso\textcolor{BrickRed}{;} \\
  10 \mbox{} \\
  11 \mbox{}\ \ \ \ \textbf{\textcolor{Black}{Item}}\textcolor{BrickRed}{(}\textcolor{ForestGreen}{int}\ destino\textcolor{BrickRed}{,}\ \textcolor{ForestGreen}{int}\ peso\textcolor{BrickRed}{)}\textcolor{Red}{\{} \\
  12 \mbox{}\ \ \ \ \ \ \ \ \textbf{\textcolor{Blue}{this}}\textcolor{BrickRed}{.}peso\ \textcolor{BrickRed}{=}\ peso\textcolor{BrickRed}{;} \\
  13 \mbox{}\ \ \ \ \ \ \ \ \textbf{\textcolor{Blue}{this}}\textcolor{BrickRed}{.}destino\ \textcolor{BrickRed}{=}\ destino\textcolor{BrickRed}{;} \\
  14 \mbox{}\ \ \ \ \textcolor{Red}{\}} \\
  15 \mbox{}\ \ \ \ \textit{\textcolor{Brown}{/*}} \\
  16 \mbox{}\textit{\textcolor{Brown}{\ \ \ \ \ *\ Implementamos\ toda\ la\ javazofia.}} \\
  17 \mbox{}\textit{\textcolor{Brown}{\ \ \ \ \ */}} \\
  18 \mbox{}\ \ \ \ \textbf{\textcolor{Blue}{public}}\ \textcolor{ForestGreen}{int}\ \textbf{\textcolor{Black}{compareTo}}\textcolor{BrickRed}{(}Item\ otro\textcolor{BrickRed}{)}\textcolor{Red}{\{} \\
  19 \mbox{}\ \ \ \ \ \ \ \ \textit{\textcolor{Brown}{//\ Return\ $<$\ 0\ si\ this\ $<$\ otro}} \\
  20 \mbox{}\ \ \ \ \ \ \ \ \textit{\textcolor{Brown}{//\ Return\ \ \ 0\ si\ this\ ==\ otro}} \\
  21 \mbox{}\ \ \ \ \ \ \ \ \textit{\textcolor{Brown}{//\ Return\ $>$\ 0\ si\ this\ $>$\ otro\ \ }} \\
  22 \mbox{}\ \ \ \ \ \ \ \ \textbf{\textcolor{Blue}{return}}\ peso\ \textcolor{BrickRed}{-}\ otro\textcolor{BrickRed}{.}peso\textcolor{BrickRed}{;}\ \textit{\textcolor{Brown}{/*\ Un\ nodo\ es\ menor\ que\ otro\ si\ tiene\ menos\ peso\ */}} \\
  23 \mbox{}\ \ \ \ \textcolor{Red}{\}} \\
  24 \mbox{}\ \ \ \ \textbf{\textcolor{Blue}{public}}\ \textcolor{ForestGreen}{boolean}\ \textbf{\textcolor{Black}{equals}}\textcolor{BrickRed}{(}Object\ otro\textcolor{BrickRed}{)}\textcolor{Red}{\{} \\
  25 \mbox{}\ \ \ \ \ \ \ \ \textbf{\textcolor{Blue}{if}}\ \textcolor{BrickRed}{(}otro\ \textbf{\textcolor{Blue}{instanceof}}\ Item\textcolor{BrickRed}{)}\textcolor{Red}{\{} \\
  26 \mbox{}\ \ \ \ \ \ \ \ \ \ \ \ Item\ ese\ \textcolor{BrickRed}{=}\ \textcolor{BrickRed}{(}Item\textcolor{BrickRed}{)}otro\textcolor{BrickRed}{;} \\
  27 \mbox{}\ \ \ \ \ \ \ \ \ \ \ \ \textbf{\textcolor{Blue}{return}}\ destino\ \textcolor{BrickRed}{==}\ ese\textcolor{BrickRed}{.}destino\ \textcolor{BrickRed}{\&\&}\ peso\ \textcolor{BrickRed}{==}\ ese\textcolor{BrickRed}{.}peso\textcolor{BrickRed}{;} \\
  28 \mbox{}\ \ \ \ \ \ \ \ \textcolor{Red}{\}} \\
  29 \mbox{}\ \ \ \ \ \ \ \ \textbf{\textcolor{Blue}{return}}\ \textbf{\textcolor{Blue}{false}}\textcolor{BrickRed}{;} \\
  30 \mbox{}\ \ \ \ \textcolor{Red}{\}} \\
  31 \mbox{}\ \ \ \ \textbf{\textcolor{Blue}{public}}\ String\ \textbf{\textcolor{Black}{toString}}\textcolor{BrickRed}{()}\textcolor{Red}{\{} \\
  32 \mbox{}\ \ \ \ \ \ \ \ \textbf{\textcolor{Blue}{return}}\ \texttt{\textcolor{Red}{"{}peso\ =\ "{}}}\ \textcolor{BrickRed}{+}\ peso\ \textcolor{BrickRed}{+}\ \texttt{\textcolor{Red}{"{},\ destino\ =\ "{}}}\ \textcolor{BrickRed}{+}\ destino\textcolor{BrickRed}{;} \\
  33 \mbox{}\ \ \ \ \textcolor{Red}{\}} \\
  34 \mbox{}\textcolor{Red}{\}} \\
  35 \mbox{} \\
  36 \mbox{}\textbf{\textcolor{Blue}{class}}\ Ejemplo\ \textcolor{Red}{\{} \\
  37 \mbox{}\ \ \ \ \textbf{\textcolor{Blue}{public}}\ \textbf{\textcolor{Blue}{static}}\ \textcolor{ForestGreen}{void}\ \textbf{\textcolor{Black}{main}}\textcolor{BrickRed}{(}String\textcolor{BrickRed}{[]}\ args\textcolor{BrickRed}{)}\ \textcolor{Red}{\{} \\
  38 \mbox{}\ \ \ \ \ \ \ \ PriorityQueue\textcolor{BrickRed}{$<$}Item\textcolor{BrickRed}{$>$}\ q\ \textcolor{BrickRed}{=}\ \textbf{\textcolor{Blue}{new}}\ PriorityQueue\textcolor{BrickRed}{$<$}Item\textcolor{BrickRed}{$>$();} \\
  39 \mbox{}\ \ \ \ \ \ \ \ q\textcolor{BrickRed}{.}\textbf{\textcolor{Black}{add}}\textcolor{BrickRed}{(}\textbf{\textcolor{Blue}{new}}\ \textbf{\textcolor{Black}{Item}}\textcolor{BrickRed}{(}\textcolor{Purple}{12}\textcolor{BrickRed}{,}\ \textcolor{Purple}{0}\textcolor{BrickRed}{));} \\
  40 \mbox{}\ \ \ \ \ \ \ \ q\textcolor{BrickRed}{.}\textbf{\textcolor{Black}{add}}\textcolor{BrickRed}{(}\textbf{\textcolor{Blue}{new}}\ \textbf{\textcolor{Black}{Item}}\textcolor{BrickRed}{(}\textcolor{Purple}{4}\textcolor{BrickRed}{,}\ \textcolor{Purple}{1876}\textcolor{BrickRed}{));} \\
  41 \mbox{}\ \ \ \ \ \ \ \ q\textcolor{BrickRed}{.}\textbf{\textcolor{Black}{add}}\textcolor{BrickRed}{(}\textbf{\textcolor{Blue}{new}}\ \textbf{\textcolor{Black}{Item}}\textcolor{BrickRed}{(}\textcolor{Purple}{13}\textcolor{BrickRed}{,}\ \textcolor{Purple}{0}\textcolor{BrickRed}{));} \\
  42 \mbox{}\ \ \ \ \ \ \ \ q\textcolor{BrickRed}{.}\textbf{\textcolor{Black}{add}}\textcolor{BrickRed}{(}\textbf{\textcolor{Blue}{new}}\ \textbf{\textcolor{Black}{Item}}\textcolor{BrickRed}{(}\textcolor{Purple}{8}\textcolor{BrickRed}{,}\ \textcolor{Purple}{0}\textcolor{BrickRed}{));} \\
  43 \mbox{}\ \ \ \ \ \ \ \ q\textcolor{BrickRed}{.}\textbf{\textcolor{Black}{add}}\textcolor{BrickRed}{(}\textbf{\textcolor{Blue}{new}}\ \textbf{\textcolor{Black}{Item}}\textcolor{BrickRed}{(}\textcolor{Purple}{7}\textcolor{BrickRed}{,}\ \textcolor{Purple}{3}\textcolor{BrickRed}{));} \\
  44 \mbox{}\ \ \ \ \ \ \ \ \textbf{\textcolor{Blue}{while}}\ \textcolor{BrickRed}{(!}q\textcolor{BrickRed}{.}\textbf{\textcolor{Black}{isEmpty}}\textcolor{BrickRed}{())}\textcolor{Red}{\{} \\
  45 \mbox{}\ \ \ \ \ \ \ \ \ \ \ \ System\textcolor{BrickRed}{.}out\textcolor{BrickRed}{.}\textbf{\textcolor{Black}{println}}\textcolor{BrickRed}{(}q\textcolor{BrickRed}{.}\textbf{\textcolor{Black}{poll}}\textcolor{BrickRed}{());} \\
  46 \mbox{}\ \ \ \ \ \ \ \ \textcolor{Red}{\}} \\
  47 \mbox{}\ \ \ \ \ \ \ \ \ \ \  \\
  48 \mbox{}\ \ \ \ \textcolor{Red}{\}} \\
  49 \mbox{}\textcolor{Red}{\}} \\
  50
  51 } \normalfont\normalsize