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5.2 KiB
HTML
138 lines
5.2 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Using Sorted Collections</title>
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<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB Java Edition Collections Tutorial" />
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<link rel="up" href="Tuple.html" title="Chapter 5. Using Tuples" />
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<link rel="prev" href="tuple-serialentitybindings.html" title="Creating Tuple-Serial Entity Bindings" />
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<link rel="next" href="SerializableEntity.html" title="Chapter 6. Using Serializable Entities" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 12.2.7.5</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">
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Using Sorted Collections
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</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="tuple-serialentitybindings.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 5.
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Using Tuples
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="SerializableEntity.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="sortedcollections"></a>
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Using Sorted Collections
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</h2>
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</div>
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</div>
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</div>
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<p>
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In general, no changes to the prior example are necessary to use
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collections having tuple keys. Iteration of elements in a stored
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collection will be ordered by the sort order of the tuples.
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</p>
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<p>
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Although not shown in the example, all methods of the
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<a class="ulink" href="http://download.oracle.com/javase/1.5.0/docs/api/java/util/SortedMap.html" target="_top">SortedMap</a>
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and
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<a class="ulink" href="http://download.oracle.com/javase/1.5.0/docs/api/java/util/SortedSet.html" target="_top">SortedSet</a>
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interfaces may be used with sorted collections. For example,
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submaps and subsets may be created.
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</p>
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<p>
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The output of the example program shows that records are sorted
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by key value.
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</p>
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<pre class="programlisting">Adding Suppliers
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Adding Parts
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Adding Shipments
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--- Parts ---
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Part: number=P1 name=Nut color=Red weight=[12.0 grams] city=London
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Part: number=P2 name=Bolt color=Green weight=[17.0 grams] city=Paris
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Part: number=P3 name=Screw color=Blue weight=[17.0 grams] city=Rome
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Part: number=P4 name=Screw color=Red weight=[14.0 grams] city=London
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Part: number=P5 name=Cam color=Blue weight=[12.0 grams] city=Paris
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Part: number=P6 name=Cog color=Red weight=[19.0 grams] city=London
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--- Suppliers ---
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Supplier: number=S1 name=Smith status=20 city=London
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Supplier: number=S2 name=Jones status=10 city=Paris
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Supplier: number=S3 name=Blake status=30 city=Paris
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Supplier: number=S4 name=Clark status=20 city=London
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Supplier: number=S5 name=Adams status=30 city=Athens
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--- Suppliers for City Paris ---
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Supplier: number=S2 name=Jones status=10 city=Paris
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Supplier: number=S3 name=Blake status=30 city=Paris
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--- Shipments ---
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Shipment: part=P1 supplier=S1 quantity=300
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Shipment: part=P1 supplier=S2 quantity=300
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Shipment: part=P2 supplier=S1 quantity=200
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Shipment: part=P2 supplier=S2 quantity=400
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Shipment: part=P2 supplier=S3 quantity=200
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Shipment: part=P2 supplier=S4 quantity=200
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Shipment: part=P3 supplier=S1 quantity=400
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Shipment: part=P4 supplier=S1 quantity=200
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Shipment: part=P4 supplier=S4 quantity=300
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Shipment: part=P5 supplier=S1 quantity=100
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Shipment: part=P5 supplier=S4 quantity=400
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Shipment: part=P6 supplier=S1 quantity=100
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--- Shipments for Part P1 ---
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Shipment: part=P1 supplier=S1 quantity=300
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Shipment: part=P1 supplier=S2 quantity=300
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--- Shipments for Supplier S1 ---
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Shipment: part=P1 supplier=S1 quantity=300
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Shipment: part=P2 supplier=S1 quantity=200
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Shipment: part=P3 supplier=S1 quantity=400
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Shipment: part=P4 supplier=S1 quantity=200
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Shipment: part=P5 supplier=S1 quantity=100
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Shipment: part=P6 supplier=S1 quantity=100 </pre>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="tuple-serialentitybindings.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="Tuple.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="SerializableEntity.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">
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Creating Tuple-Serial Entity Bindings
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</td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> Chapter 6.
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Using Serializable Entities
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</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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