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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><meta http-equiv="content-type" content="text/html; charset=UTF-8" /><title>CharSubSequence xref</title><link type="text/css" rel="stylesheet" href="../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../apidocs/org/archive/io/CharSubSequence.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> CharSubSequence.java</em></em><a name="2" href="#2">2</a> <em class="comment"> *</em><a name="3" href="#3">3</a> <em class="comment"> * Created on Sep 30, 2003</em><a name="4" href="#4">4</a> <em class="comment"> *</em><a name="5" href="#5">5</a> <em class="comment"> * Copyright (C) 2003 Internet Archive.</em><a name="6" href="#6">6</a> <em class="comment"> *</em><a name="7" href="#7">7</a> <em class="comment"> * This file is part of the Heritrix web crawler (crawler.archive.org).</em><a name="8" href="#8">8</a> <em class="comment"> *</em><a name="9" href="#9">9</a> <em class="comment"> * Heritrix is free software; you can redistribute it and/or modify</em><a name="10" href="#10">10</a> <em class="comment"> * it under the terms of the GNU Lesser Public License as published by</em><a name="11" href="#11">11</a> <em class="comment"> * the Free Software Foundation; either version 2.1 of the License, or</em><a name="12" href="#12">12</a> <em class="comment"> * any later version.</em><a name="13" href="#13">13</a> <em class="comment"> *</em><a name="14" href="#14">14</a> <em class="comment"> * Heritrix is distributed in the hope that it will be useful,</em><a name="15" href="#15">15</a> <em class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</em><a name="16" href="#16">16</a> <em class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</em><a name="17" href="#17">17</a> <em class="comment"> * GNU Lesser Public License for more details.</em><a name="18" href="#18">18</a> <em class="comment"> *</em><a name="19" href="#19">19</a> <em class="comment"> * You should have received a copy of the GNU Lesser Public License</em><a name="20" href="#20">20</a> <em class="comment"> * along with Heritrix; if not, write to the Free Software</em><a name="21" href="#21">21</a> <em class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</em><a name="22" href="#22">22</a> <em class="comment"> */</em><a name="23" href="#23">23</a> <strong>package</strong> <a href="../../../org/archive/io/package-summary.html">org.archive.io</a>;<a name="24" href="#24">24</a> <a name="25" href="#25">25</a> <a name="26" href="#26">26</a> <em>/**<em>*</em></em><a name="27" href="#27">27</a> <em> * Provides a subsequence view onto a CharSequence.</em><a name="28" href="#28">28</a> <em> *</em><a name="29" href="#29">29</a> <em> * @author gojomo</em><a name="30" href="#30">30</a> <em> * @version $Revision: 1.7 $, $Date: 2005/03/31 17:43:22 $</em><a name="31" href="#31">31</a> <em> */</em><a name="32" href="#32">32</a> <strong>public</strong> <strong>class</strong> <a href="../../../org/archive/io/CharSubSequence.html">CharSubSequence</a> implements CharSequence {<a name="33" href="#33">33</a> <a name="34" href="#34">34</a> CharSequence <strong>inner</strong>;<a name="35" href="#35">35</a> <strong>int</strong> start;<a name="36" href="#36">36</a> <strong>int</strong> end;<a name="37" href="#37">37</a> <a name="38" href="#38">38</a> <strong>public</strong> <a href="../../../org/archive/io/CharSubSequence.html">CharSubSequence</a>(CharSequence <strong>inner</strong>, <strong>int</strong> start, <strong>int</strong> end) {<a name="39" href="#39">39</a> <strong>if</strong> (end < start) {<a name="40" href="#40">40</a> <strong>throw</strong> <strong>new</strong> IllegalArgumentException(<span class="string">"Start "</span> + start + <span class="string">" is > "</span> +<a name="41" href="#41">41</a> <span class="string">" than end "</span> + end);<a name="42" href="#42">42</a> }<a name="43" href="#43">43</a> <a name="44" href="#44">44</a> <strong>if</strong> (end < 0 || start < 0) {<a name="45" href="#45">45</a> <strong>throw</strong> <strong>new</strong> IllegalArgumentException(<span class="string">"Start "</span> + start + <span class="string">" or end "</span> +<a name="46" href="#46">46</a> end + <span class="string">" is < 0."</span>);<a name="47" href="#47">47</a> }<a name="48" href="#48">48</a> <a name="49" href="#49">49</a> <strong>if</strong> (<strong>inner</strong> == <strong>null</strong>) {<a name="50" href="#50">50</a> <strong>throw</strong> <strong>new</strong> NullPointerException(<span class="string">"Passed charsequence is null."</span>);<a name="51" href="#51">51</a> }<a name="52" href="#52">52</a> <a name="53" href="#53">53</a> <strong>this</strong>.<strong>inner</strong> = <strong>inner</strong>;<a name="54" href="#54">54</a> <strong>this</strong>.start = start;<a name="55" href="#55">55</a> <strong>this</strong>.end = end;<a name="56" href="#56">56</a> }<a name="57" href="#57">57</a> <a name="58" href="#58">58</a> <em class="comment">/*</em><a name="59" href="#59">59</a> <em class="comment"> * (non-Javadoc)</em><a name="60" href="#60">60</a> <em class="comment"> * @see java.lang.CharSequence#length()</em><a name="61" href="#61">61</a> <em class="comment"> */</em><a name="62" href="#62">62</a> <strong>public</strong> <strong>int</strong> length() {<a name="63" href="#63">63</a> <strong>return</strong> <strong>this</strong>.end - <strong>this</strong>.start;<a name="64" href="#64">64</a> }<a name="65" href="#65">65</a> <a name="66" href="#66">66</a> <em class="comment">/*</em><a name="67" href="#67">67</a> <em class="comment"> * (non-Javadoc)</em><a name="68" href="#68">68</a> <em class="comment"> * @see java.lang.CharSequence#charAt(int)</em><a name="69" href="#69">69</a> <em class="comment"> */</em><a name="70" href="#70">70</a> <strong>public</strong> <strong>char</strong> <strong>char</strong>At(<strong>int</strong> index) {<a name="71" href="#71">71</a> <strong>return</strong> <strong>this</strong>.<strong>inner</strong>.charAt(<strong>this</strong>.start + index);<a name="72" href="#72">72</a> }<a name="73" href="#73">73</a> <a name="74" href="#74">74</a> <em class="comment">/*</em><a name="75" href="#75">75</a> <em class="comment"> * (non-Javadoc)</em><a name="76" href="#76">76</a> <em class="comment"> * @see java.lang.CharSequence#subSequence(int, int)</em><a name="77" href="#77">77</a> <em class="comment"> */</em><a name="78" href="#78">78</a> <strong>public</strong> CharSequence subSequence(<strong>int</strong> begin, <strong>int</strong> finish) {<a name="79" href="#79">79</a> <strong>return</strong> <strong>new</strong> <a href="../../../org/archive/io/CharSubSequence.html">CharSubSequence</a>(<strong>this</strong>, begin, finish);<a name="80" href="#80">80</a> }<a name="81" href="#81">81</a> <a name="82" href="#82">82</a> <em class="comment">/*</em><a name="83" href="#83">83</a> <em class="comment"> * (non-Javadoc)</em><a name="84" href="#84">84</a> <em class="comment"> * @see java.lang.CharSequence#toString()</em><a name="85" href="#85">85</a> <em class="comment"> */</em><a name="86" href="#86">86</a> <strong>public</strong> String toString() {<a name="87" href="#87">87</a> StringBuffer sb = <strong>new</strong> StringBuffer(length());<a name="88" href="#88">88</a> <em class="comment">// could use StringBuffer.append(CharSequence) if willing to do 1.5 & up</em><a name="89" href="#89">89</a> <strong>for</strong> (<strong>int</strong> i = 0;i<length();i++) {<a name="90" href="#90">90</a> sb.append(charAt(i)); <a name="91" href="#91">91</a> }<a name="92" href="#92">92</a> <strong>return</strong> sb.toString();<a name="93" href="#93">93</a> }<a name="94" href="#94">94</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>⌨️ 快捷键说明
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