📄 x.html
字号:
<!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>X xref</title><link type="text/css" rel="stylesheet" href="../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../apidocs/st/ata/util/X.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <a name="2" href="#2">2</a> <strong>package</strong> <a href="../../../st/ata/util/package-summary.html">st.ata.util</a>;<a name="3" href="#3">3</a> <a name="4" href="#4">4</a> <strong>import</strong> java.io.PrintWriter;<a name="5" href="#5">5</a> <strong>import</strong> java.io.StringWriter;<a name="6" href="#6">6</a> <strong>import</strong> java.lang.reflect.UndeclaredThrowableException;<a name="7" href="#7">7</a> <strong>import</strong> java.util.ArrayList;<a name="8" href="#8">8</a> <strong>import</strong> java.util.Collections;<a name="9" href="#9">9</a> <strong>import</strong> java.util.Comparator;<a name="10" href="#10">10</a> <strong>import</strong> java.util.logging.Level;<a name="11" href="#11">11</a> <strong>import</strong> java.util.logging.Logger;<a name="12" href="#12">12</a> <a name="13" href="#13">13</a> <em class="comment">// Tested by TestX.java</em><a name="14" href="#14">14</a> <a name="15" href="#15">15</a> <em>/**<em>* A collection of useful static methods. */</em></em><a name="16" href="#16">16</a> <a name="17" href="#17">17</a> <strong>public</strong> <strong>final</strong> <strong>class</strong> <a href="../../../st/ata/util/X.html">X</a> {<a name="18" href="#18">18</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> <strong>int</strong> DEBUG = 2;<a name="19" href="#19">19</a> <a name="20" href="#20">20</a> <em>/**<em>* Throws a runtime exception with message <code>m</code>. */</em></em><a name="21" href="#21">21</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> fail(String m) {<a name="22" href="#22">22</a> RuntimeException e = <strong>new</strong> RuntimeException(m);<a name="23" href="#23">23</a> popTrace(e, 1);<a name="24" href="#24">24</a> <strong>throw</strong> e;<a name="25" href="#25">25</a> }<a name="26" href="#26">26</a> <a name="27" href="#27">27</a> <em>/**<em>*</em></em><a name="28" href="#28">28</a> <em> * Throws a runtime exception with message <code>systemProperty</code>.</em><a name="29" href="#29">29</a> <em> * @param systemProperty a <code>String</code> value which specifies</em><a name="30" href="#30">30</a> <em> * a boolean system property, which if true will cause</em><a name="31" href="#31">31</a> <em> * an exception to be thrown.</em><a name="32" href="#32">32</a> <em> */</em><a name="33" href="#33">33</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> testFailure(String systemProperty) {<a name="34" href="#34">34</a> <strong>if</strong> (!Boolean.getBoolean(systemProperty)) {<a name="35" href="#35">35</a> <strong>return</strong>;<a name="36" href="#36">36</a> }<a name="37" href="#37">37</a> <a name="38" href="#38">38</a> RuntimeException e = <strong>new</strong> RuntimeException(systemProperty);<a name="39" href="#39">39</a> popTrace(e, 1);<a name="40" href="#40">40</a> <strong>throw</strong> e;<a name="41" href="#41">41</a> }<a name="42" href="#42">42</a> <a name="43" href="#43">43</a> <em>/**<em>* Throws a runtime exception if <code>b</code> is not true. */</em></em><a name="44" href="#44">44</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> check(<strong>boolean</strong> b) {<a name="45" href="#45">45</a> <strong>if</strong> (b) <strong>return</strong>;<a name="46" href="#46">46</a> RuntimeException e = <strong>new</strong> RuntimeException(<span class="string">"assertion failure"</span>);<a name="47" href="#47">47</a> popTrace(e, 1);<a name="48" href="#48">48</a> <strong>throw</strong> e;<a name="49" href="#49">49</a> }<a name="50" href="#50">50</a> <a name="51" href="#51">51</a> <em>/**<em>* Throws a runtime exception if <code>b</code> is not true. */</em></em><a name="52" href="#52">52</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> check(<strong>boolean</strong> b, String m) {<a name="53" href="#53">53</a> <strong>if</strong> (b) <strong>return</strong>;<a name="54" href="#54">54</a> RuntimeException e = <strong>new</strong> RuntimeException(m);<a name="55" href="#55">55</a> popTrace(e, 1);<a name="56" href="#56">56</a> <strong>throw</strong> e;<a name="57" href="#57">57</a> }<a name="58" href="#58">58</a> <a name="59" href="#59">59</a> <em>/**<em>* Throws an illegal argument exception if <code>b</code> is not true. */</em></em><a name="60" href="#60">60</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> checkargs(<strong>boolean</strong> b) {<a name="61" href="#61">61</a> <strong>if</strong> (b) <strong>return</strong>;<a name="62" href="#62">62</a> RuntimeException e = <strong>new</strong> IllegalArgumentException();<a name="63" href="#63">63</a> popTrace(e, 1);<a name="64" href="#64">64</a> <strong>throw</strong> e;<a name="65" href="#65">65</a> }<a name="66" href="#66">66</a> <a name="67" href="#67">67</a> <em>/**<em>* Throws an illegal state exception if <code>b</code> is not true. */</em></em><a name="68" href="#68">68</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> checkstate(<strong>boolean</strong> b) {<a name="69" href="#69">69</a> <strong>if</strong> (b) <strong>return</strong>;<a name="70" href="#70">70</a> RuntimeException e = <strong>new</strong> IllegalStateException();<a name="71" href="#71">71</a> popTrace(e, 1);<a name="72" href="#72">72</a> <strong>throw</strong> e;<a name="73" href="#73">73</a> }<a name="74" href="#74">74</a> <a name="75" href="#75">75</a> <em>/**<em>*</em></em><a name="76" href="#76">76</a> <em> * Returns an {@link UndeclaredThrowableException}</em><a name="77" href="#77">77</a> <em> * wrapping <code>e</code>.</em><a name="78" href="#78">78</a> <em> */</em><a name="79" href="#79">79</a> <a name="80" href="#80">80</a> <strong>public</strong> <strong>static</strong> RuntimeException toRTE(Exception e) {<a name="81" href="#81">81</a> RuntimeException rte = <strong>new</strong> UndeclaredThrowableException(e);<a name="82" href="#82">82</a> popTrace(rte, 1);<a name="83" href="#83">83</a> <strong>return</strong> rte;<a name="84" href="#84">84</a> }<a name="85" href="#85">85</a> <a name="86" href="#86">86</a> <em>/**<em>* Same as <c>ut(b,&nbsp;"")</c>. */</em></em><a name="87" href="#87">87</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> ut(<strong>boolean</strong> b) { ut(b, <span class="string">""</span>); }<a name="88" href="#88">88</a> <a name="89" href="#89">89</a> <em>/**<em>* Test condition during unit testing. If <c>b</c> is true, does</em></em><a name="90" href="#90">90</a> <em> nothing. If <c>b</c> is not true, prints (to</em><a name="91" href="#91">91</a> <em> <c>System.out</c>)</em><a name="92" href="#92">92</a> <em> <c>"Unit&nbsp;test&nbsp;failure:&nbsp;"&nbsp;+&nbsp;m</c> and</em><a name="93" href="#93">93</a> <em> a stack trace then returns. */</em><a name="94" href="#94">94</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> ut(<strong>boolean</strong> b, String m) {<a name="95" href="#95">95</a> <strong>if</strong> (! b) {<a name="96" href="#96">96</a> <strong>try</strong> {<a name="97" href="#97">97</a> <strong>if</strong> (b) <strong>return</strong>;<a name="98" href="#98">98</a> RuntimeException e<a name="99" href="#99">99</a> = <strong>new</strong> RuntimeException(<span class="string">"Unit test failure: "</span> + m);<a name="100" href="#100">100</a> popTrace(e, 1);<a name="101" href="#101">101</a> <strong>throw</strong> e;<a name="102" href="#102">102</a> } <strong>catch</strong> (RuntimeException e) {<a name="103" href="#103">103</a> System.out.println(<span class="string">""</span>);<a name="104" href="#104">104</a> e.printStackTrace(System.out);<a name="105" href="#105">105</a> }<a name="106" href="#106">106</a> }<a name="107" href="#107">107</a> }<a name="108" href="#108">108</a> <em>/**<em>*</em></em><a name="109" href="#109">109</a> <em> * print out the programName and arguments used</em><a name="110" href="#110">110</a> <em> */</em><a name="111" href="#111">111</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> printArgs(String programName, String[] args) {<a name="112" href="#112">112</a> System.out.print(programName);<a name="113" href="#113">113</a> <strong>for</strong> (<strong>int</strong> i=0; i<args.length; i++){<a name="114" href="#114">114</a> System.out.print(<span class="string">" "</span>);<a name="115" href="#115">115</a> System.out.print(args[i]);<a name="116" href="#116">116</a> }<a name="117" href="#117">117</a> }<a name="118" href="#118">118</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> noimpl() {<a name="119" href="#119">119</a> RuntimeException e = <strong>new</strong> RuntimeException(<span class="string">"Not implemented yet."</span>);<a name="120" href="#120">120</a> popTrace(e, 1);<a name="121" href="#121">121</a> <strong>throw</strong> e;<a name="122" href="#122">122</a> }<a name="123" href="#123">123</a> <a name="124" href="#124">124</a> <em>/**<em>* Returns a full description of a {@link Throwable}. This full</em></em><a name="125" href="#125">125</a> <em> * description includes a stack trace. This method will never</em><a name="126" href="#126">126</a> <em> * throw an error or exception: if something bad happens, it</em><a name="127" href="#127">127</a> <em> * simply returns null. */</em><a name="128" href="#128">128</a> <strong>public</strong> <strong>static</strong> String getFullDescription(Throwable t) {<a name="129" href="#129">129</a> <strong>try</strong> {<a name="130" href="#130">130</a> StringWriter sw = <strong>new</strong> StringWriter();<a name="131" href="#131">131</a> PrintWriter o = <strong>new</strong> PrintWriter(sw);<a name="132" href="#132">132</a> t.printStackTrace(o);<a name="133" href="#133">133</a> o.flush();<a name="134" href="#134">134</a> <strong>return</strong> sw.toString();<a name="135" href="#135">135</a> } <strong>catch</strong> (Throwable ignore) { <strong>return</strong> <strong>null</strong>; }<a name="136" href="#136">136</a> }⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -