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javassist/html/javassist/bytecode/MethodInfo.html

MethodInfo.html 44KB
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  1. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

  2. <!-- NewPage -->

  3. <html lang="en">

  4. <head>

  5. <!-- Generated by javadoc (10.0.1) on Thu Jun 21 01:52:55 JST 2018 -->

  6. <title>MethodInfo (Javassist API)</title>

  7. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

  8. <meta name="date" content="2018-06-21">

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  24.             parent.document.title="MethodInfo (Javassist API)";

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  27.     catch(err) {

  28.     }

  29. //-->

  30. var methods = {"i0":10,"i1":10,"i2":10,"i3":10,"i4":10,"i5":10,"i6":10,"i7":10,"i8":10,"i9":10,"i10":10,"i11":10,"i12":10,"i13":10,"i14":10,"i15":10,"i16":10,"i17":10,"i18":10,"i19":10,"i20":10,"i21":10,"i22":10,"i23":10,"i24":10,"i25":10};

  31. var tabs = {65535:["t0","All Methods"],2:["t2","Instance Methods"],8:["t4","Concrete Methods"]};

  32. var altColor = "altColor";

  33. var rowColor = "rowColor";

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  91. </div>

  92. <div>

  93. <ul class="subNavList">

  94. <li>Summary:&nbsp;</li>

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  117. <!-- ======== START OF CLASS DATA ======== -->

  118. <div class="header">

  119. <div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="../../javassist/bytecode/package-summary.html">javassist.bytecode</a></div>

  120. <h2 title="Class MethodInfo" class="title">Class MethodInfo</h2>

  121. </div>

  122. <div class="contentContainer">

  123. <ul class="inheritance">

  124. <li>java.lang.Object</li>

  125. <li>

  126. <ul class="inheritance">

  127. <li>javassist.bytecode.MethodInfo</li>

  128. </ul>

  129. </li>

  130. </ul>

  131. <div class="description">

  132. <ul class="blockList">

  133. <li class="blockList">

  134. <hr>

  135. <pre>public class <span class="typeNameLabel">MethodInfo</span>

  136. extends java.lang.Object</pre>

  137. <div class="block"><code>method_info</code> structure.

  138. 

  139.  <p>The bytecode sequence of the method is represented

  140.  by a <code>CodeAttribute</code> object.

  141. 

  142.  <p>The following code adds the default constructor to a class:

  143.  of <code>int</code> type:

  144.  <blockquote><pre>

  145.  ClassFile cf = ...

  146.  Bytecode code = new Bytecode(cf.getConstPool());

  147.  code.addAload(0);

  148.  code.addInvokespecial("java/lang/Object", MethodInfo.nameInit, "()V");

  149.  code.addReturn(null);

  150.  code.setMaxLocals(1);

  151. 

  152.  MethodInfo minfo = new MethodInfo(cf.getConstPool(), MethodInfo.nameInit, "()V");

  153.  minfo.setCodeAttribute(code.toCodeAttribute());

  154.  cf.addMethod(minfo);

  155.  </pre></blockquote></div>

  156. <dl>

  157. <dt><span class="seeLabel">See Also:</span></dt>

  158. <dd><a href="../../javassist/bytecode/MethodInfo.html#getCodeAttribute--"><code>getCodeAttribute()</code></a>, 

  159. <a href="../../javassist/bytecode/CodeAttribute.html" title="class in javassist.bytecode"><code>CodeAttribute</code></a>, 

  160. <a href="../../javassist/bytecode/Bytecode.html" title="class in javassist.bytecode"><code>Bytecode</code></a>, 

  161. <a href="../../javassist/CtBehavior.html#getMethodInfo--"><code>CtBehavior.getMethodInfo()</code></a>, 

  162. <a href="../../javassist/CtBehavior.html#getMethodInfo--"><code>CtBehavior.getMethodInfo()</code></a></dd>

  163. </dl>

  164. </li>

  165. </ul>

  166. </div>

  167. <div class="summary">

  168. <ul class="blockList">

  169. <li class="blockList">

  170. <!-- =========== FIELD SUMMARY =========== -->

  171. <ul class="blockList">

  172. <li class="blockList"><a name="field.summary">

  173. <!--   -->

  174. </a>

  175. <h3>Field Summary</h3>

  176. <table class="memberSummary" summary="Field Summary table, listing fields, and an explanation">

  177. <caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>

  178. <tr>

  179. <th class="colFirst" scope="col">Modifier and Type</th>

  180. <th class="colSecond" scope="col">Field</th>

  181. <th class="colLast" scope="col">Description</th>

  182. </tr>

  183. <tr class="altColor">

  184. <td class="colFirst"><code>static boolean</code></td>

  185. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#doPreverify">doPreverify</a></span></code></th>

  186. <td class="colLast">

  187. <div class="block">If this value is true, Javassist maintains a <code>StackMap</code> attribute

  188.  generated by the <code>preverify</code> tool of J2ME (CLDC).</div>

  189. </td>

  190. </tr>

  191. <tr class="rowColor">

  192. <td class="colFirst"><code>static java.lang.String</code></td>

  193. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#nameClinit">nameClinit</a></span></code></th>

  194. <td class="colLast">

  195. <div class="block">The name of class initializer (static initializer):

  196.  <code>&lt;clinit&gt;</code>.</div>

  197. </td>

  198. </tr>

  199. <tr class="altColor">

  200. <td class="colFirst"><code>static java.lang.String</code></td>

  201. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#nameInit">nameInit</a></span></code></th>

  202. <td class="colLast">

  203. <div class="block">The name of constructors: <code>&lt;init&gt;</code>.</div>

  204. </td>

  205. </tr>

  206. </table>

  207. </li>

  208. </ul>

  209. <!-- ======== CONSTRUCTOR SUMMARY ======== -->

  210. <ul class="blockList">

  211. <li class="blockList"><a name="constructor.summary">

  212. <!--   -->

  213. </a>

  214. <h3>Constructor Summary</h3>

  215. <table class="memberSummary" summary="Constructor Summary table, listing constructors, and an explanation">

  216. <caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>

  217. <tr>

  218. <th class="colFirst" scope="col">Constructor</th>

  219. <th class="colLast" scope="col">Description</th>

  220. </tr>

  221. <tr class="altColor">

  222. <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#MethodInfo-javassist.bytecode.ConstPool-java.lang.String-java.lang.String-">MethodInfo</a></span>&#8203;(<a href="../../javassist/bytecode/ConstPool.html" title="class in javassist.bytecode">ConstPool</a>&nbsp;cp,

  223.           java.lang.String&nbsp;methodname,

  224.           java.lang.String&nbsp;desc)</code></th>

  225. <td class="colLast">

  226. <div class="block">Constructs a <code>method_info</code> structure.</div>

  227. </td>

  228. </tr>

  229. <tr class="rowColor">

  230. <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#MethodInfo-javassist.bytecode.ConstPool-java.lang.String-javassist.bytecode.MethodInfo-java.util.Map-">MethodInfo</a></span>&#8203;(<a href="../../javassist/bytecode/ConstPool.html" title="class in javassist.bytecode">ConstPool</a>&nbsp;cp,

  231.           java.lang.String&nbsp;methodname,

  232.           <a href="../../javassist/bytecode/MethodInfo.html" title="class in javassist.bytecode">MethodInfo</a>&nbsp;src,

  233.           java.util.Map&lt;java.lang.String,java.lang.String&gt;&nbsp;classnameMap)</code></th>

  234. <td class="colLast">

  235. <div class="block">Constructs a copy of <code>method_info</code> structure.</div>

  236. </td>

  237. </tr>

  238. </table>

  239. </li>

  240. </ul>

  241. <!-- ========== METHOD SUMMARY =========== -->

  242. <ul class="blockList">

  243. <li class="blockList"><a name="method.summary">

  244. <!--   -->

  245. </a>

  246. <h3>Method Summary</h3>

  247. <table class="memberSummary" summary="Method Summary table, listing methods, and an explanation">

  248. <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>

  249. <tr>

  250. <th class="colFirst" scope="col">Modifier and Type</th>

  251. <th class="colSecond" scope="col">Method</th>

  252. <th class="colLast" scope="col">Description</th>

  253. </tr>

  254. <tr id="i0" class="altColor">

  255. <td class="colFirst"><code>void</code></td>

  256. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#addAttribute-javassist.bytecode.AttributeInfo-">addAttribute</a></span>&#8203;(<a href="../../javassist/bytecode/AttributeInfo.html" title="class in javassist.bytecode">AttributeInfo</a>&nbsp;info)</code></th>

  257. <td class="colLast">

  258. <div class="block">Appends an attribute.</div>

  259. </td>

  260. </tr>

  261. <tr id="i1" class="rowColor">

  262. <td class="colFirst"><code>int</code></td>

  263. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#getAccessFlags--">getAccessFlags</a></span>()</code></th>

  264. <td class="colLast">

  265. <div class="block">Returns access flags.</div>

  266. </td>

  267. </tr>

  268. <tr id="i2" class="altColor">

  269. <td class="colFirst"><code><a href="../../javassist/bytecode/AttributeInfo.html" title="class in javassist.bytecode">AttributeInfo</a></code></td>

  270. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#getAttribute-java.lang.String-">getAttribute</a></span>&#8203;(java.lang.String&nbsp;name)</code></th>

  271. <td class="colLast">

  272. <div class="block">Returns the attribute with the specified name.</div>

  273. </td>

  274. </tr>

  275. <tr id="i3" class="rowColor">

  276. <td class="colFirst"><code>java.util.List&lt;<a href="../../javassist/bytecode/AttributeInfo.html" title="class in javassist.bytecode">AttributeInfo</a>&gt;</code></td>

  277. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#getAttributes--">getAttributes</a></span>()</code></th>

  278. <td class="colLast">

  279. <div class="block">Returns all the attributes.</div>

  280. </td>

  281. </tr>

  282. <tr id="i4" class="altColor">

  283. <td class="colFirst"><code><a href="../../javassist/bytecode/CodeAttribute.html" title="class in javassist.bytecode">CodeAttribute</a></code></td>

  284. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#getCodeAttribute--">getCodeAttribute</a></span>()</code></th>

  285. <td class="colLast">

  286. <div class="block">Returns a Code attribute.</div>

  287. </td>

  288. </tr>

  289. <tr id="i5" class="rowColor">

  290. <td class="colFirst"><code><a href="../../javassist/bytecode/ConstPool.html" title="class in javassist.bytecode">ConstPool</a></code></td>

  291. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#getConstPool--">getConstPool</a></span>()</code></th>

  292. <td class="colLast">

  293. <div class="block">Returns a constant pool table used by this method.</div>

  294. </td>

  295. </tr>

  296. <tr id="i6" class="altColor">

  297. <td class="colFirst"><code>java.lang.String</code></td>

  298. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#getDescriptor--">getDescriptor</a></span>()</code></th>

  299. <td class="colLast">

  300. <div class="block">Returns a method descriptor.</div>

  301. </td>

  302. </tr>

  303. <tr id="i7" class="rowColor">

  304. <td class="colFirst"><code><a href="../../javassist/bytecode/ExceptionsAttribute.html" title="class in javassist.bytecode">ExceptionsAttribute</a></code></td>

  305. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#getExceptionsAttribute--">getExceptionsAttribute</a></span>()</code></th>

  306. <td class="colLast">

  307. <div class="block">Returns an Exceptions attribute.</div>

  308. </td>

  309. </tr>

  310. <tr id="i8" class="altColor">

  311. <td class="colFirst"><code>int</code></td>

  312. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#getLineNumber-int-">getLineNumber</a></span>&#8203;(int&nbsp;pos)</code></th>

  313. <td class="colLast">

  314. <div class="block">Returns the line number of the source line corresponding to the specified

  315.  bytecode contained in this method.</div>

  316. </td>

  317. </tr>

  318. <tr id="i9" class="rowColor">

  319. <td class="colFirst"><code>java.lang.String</code></td>

  320. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#getName--">getName</a></span>()</code></th>

  321. <td class="colLast">

  322. <div class="block">Returns a method name.</div>

  323. </td>

  324. </tr>

  325. <tr id="i10" class="altColor">

  326. <td class="colFirst"><code>boolean</code></td>

  327. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#isConstructor--">isConstructor</a></span>()</code></th>

  328. <td class="colLast">

  329. <div class="block">Returns true if this is a constructor.</div>

  330. </td>

  331. </tr>

  332. <tr id="i11" class="rowColor">

  333. <td class="colFirst"><code>boolean</code></td>

  334. <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javassist/bytecode/MethodInfo.html#isMethod--">isMethod</a></span>()</code></th>

  335. <td class="colLast">

  336. <div class="block">Returns true if this is not a constructor or a class initializer (static

  337.  initializer).</div>

  338. </td>

  339. </tr>

  340. <tr id="i12" class="altColor">

  341. <td class="colFirst"><code>boolean</code></td>

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  344. <div class="block">Returns true if this is a class initializer (static initializer).</div>

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  346. </tr>

  347. <tr id="i13" class="rowColor">

  348. <td class="colFirst"><code>void</code></td>

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  373. <td class="colLast">

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  409. <div class="block">Sets a method descriptor.</div>

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  799. <pre>public&nbsp;<a href="../../javassist/bytecode/CodeAttribute.html" title="class in javassist.bytecode">CodeAttribute</a>&nbsp;getCodeAttribute()</pre>

  800. <div class="block">Returns a Code attribute.</div>

  801. <dl>

  802. <dt><span class="returnLabel">Returns:</span></dt>

  803. <dd>a Code attribute or null if it is not specified.</dd>

  804. </dl>

  805. </li>

  806. </ul>

  807. <a name="removeExceptionsAttribute--">

  808. <!--   -->

  809. </a>

  810. <ul class="blockList">

  811. <li class="blockList">

  812. <h4>removeExceptionsAttribute</h4>

  813. <pre>public&nbsp;void&nbsp;removeExceptionsAttribute()</pre>

  814. <div class="block">Removes an Exception attribute.</div>

  815. </li>

  816. </ul>

  817. <a name="setExceptionsAttribute-javassist.bytecode.ExceptionsAttribute-">

  818. <!--   -->

  819. </a>

  820. <ul class="blockList">

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  822. <h4>setExceptionsAttribute</h4>

  823. <pre>public&nbsp;void&nbsp;setExceptionsAttribute&#8203;(<a href="../../javassist/bytecode/ExceptionsAttribute.html" title="class in javassist.bytecode">ExceptionsAttribute</a>&nbsp;cattr)</pre>

  824. <div class="block">Adds an Exception attribute.

  825.  

  826.  <p>

  827.  The added attribute must share the same constant pool table as this

  828.  <code>method_info</code> structure.</div>

  829. </li>

  830. </ul>

  831. <a name="removeCodeAttribute--">

  832. <!--   -->

  833. </a>

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  835. <li class="blockList">

  836. <h4>removeCodeAttribute</h4>

  837. <pre>public&nbsp;void&nbsp;removeCodeAttribute()</pre>

  838. <div class="block">Removes a Code attribute.</div>

  839. </li>

  840. </ul>

  841. <a name="setCodeAttribute-javassist.bytecode.CodeAttribute-">

  842. <!--   -->

  843. </a>

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  848. <div class="block">Adds a Code attribute.

  849.  

  850.  <p>

  851.  The added attribute must share the same constant pool table as this

  852.  <code>method_info</code> structure.</div>

  853. </li>

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  862.                                <a href="../../javassist/bytecode/ClassFile.html" title="class in javassist.bytecode">ClassFile</a>&nbsp;cf)

  863.                         throws <a href="../../javassist/bytecode/BadBytecode.html" title="class in javassist.bytecode">BadBytecode</a></pre>

  864. <div class="block">Rebuilds a stack map table if the class file is for Java 6

  865.  or later.  Java 5 or older Java VMs do not recognize a stack

  866.  map table.  If <code>doPreverify</code> is true, this method

  867.  also rebuilds a stack map for J2ME (CLDC).</div>

  868. <dl>

  869. <dt><span class="paramLabel">Parameters:</span></dt>

  870. <dd><code>pool</code> - used for making type hierarchy.</dd>

  871. <dd><code>cf</code> - rebuild if this class file is for Java 6 or later.</dd>

  872. <dt><span class="throwsLabel">Throws:</span></dt>

  873. <dd><code><a href="../../javassist/bytecode/BadBytecode.html" title="class in javassist.bytecode">BadBytecode</a></code></dd>

  874. <dt><span class="simpleTagLabel">Since:</span></dt>

  875. <dd>3.6</dd>

  876. <dt><span class="seeLabel">See Also:</span></dt>

  877. <dd><a href="../../javassist/bytecode/MethodInfo.html#rebuildStackMap-javassist.ClassPool-"><code>rebuildStackMap(ClassPool)</code></a>, 

  878. <a href="../../javassist/bytecode/MethodInfo.html#rebuildStackMapForME-javassist.ClassPool-"><code>rebuildStackMapForME(ClassPool)</code></a>, 

  879. <a href="../../javassist/bytecode/MethodInfo.html#doPreverify"><code>doPreverify</code></a></dd>

  880. </dl>

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  890.                      throws <a href="../../javassist/bytecode/BadBytecode.html" title="class in javassist.bytecode">BadBytecode</a></pre>

  891. <div class="block">Rebuilds a stack map table.  If no stack map table is included,

  892.  a new one is created.  If this <code>MethodInfo</code> does not

  893.  include a code attribute, nothing happens.</div>

  894. <dl>

  895. <dt><span class="paramLabel">Parameters:</span></dt>

  896. <dd><code>pool</code> - used for making type hierarchy.</dd>

  897. <dt><span class="throwsLabel">Throws:</span></dt>

  898. <dd><code><a href="../../javassist/bytecode/BadBytecode.html" title="class in javassist.bytecode">BadBytecode</a></code></dd>

  899. <dt><span class="simpleTagLabel">Since:</span></dt>

  900. <dd>3.6</dd>

  901. <dt><span class="seeLabel">See Also:</span></dt>

  902. <dd><a href="../../javassist/bytecode/StackMapTable.html" title="class in javassist.bytecode"><code>StackMapTable</code></a></dd>

  903. </dl>

  904. </li>

  905. </ul>

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  910. <li class="blockList">

  911. <h4>rebuildStackMapForME</h4>

  912. <pre>public&nbsp;void&nbsp;rebuildStackMapForME&#8203;(<a href="../../javassist/ClassPool.html" title="class in javassist">ClassPool</a>&nbsp;pool)

  913.                           throws <a href="../../javassist/bytecode/BadBytecode.html" title="class in javassist.bytecode">BadBytecode</a></pre>

  914. <div class="block">Rebuilds a stack map table for J2ME (CLDC).  If no stack map table is included,

  915.  a new one is created.  If this <code>MethodInfo</code> does not

  916.  include a code attribute, nothing happens.</div>

  917. <dl>

  918. <dt><span class="paramLabel">Parameters:</span></dt>

  919. <dd><code>pool</code> - used for making type hierarchy.</dd>

  920. <dt><span class="throwsLabel">Throws:</span></dt>

  921. <dd><code><a href="../../javassist/bytecode/BadBytecode.html" title="class in javassist.bytecode">BadBytecode</a></code></dd>

  922. <dt><span class="simpleTagLabel">Since:</span></dt>

  923. <dd>3.12</dd>

  924. <dt><span class="seeLabel">See Also:</span></dt>

  925. <dd><a href="../../javassist/bytecode/StackMap.html" title="class in javassist.bytecode"><code>StackMap</code></a></dd>

  926. </dl>

  927. </li>

  928. </ul>

  929. <a name="getLineNumber-int-">

  930. <!--   -->

  931. </a>

  932. <ul class="blockList">

  933. <li class="blockList">

  934. <h4>getLineNumber</h4>

  935. <pre>public&nbsp;int&nbsp;getLineNumber&#8203;(int&nbsp;pos)</pre>

  936. <div class="block">Returns the line number of the source line corresponding to the specified

  937.  bytecode contained in this method.</div>

  938. <dl>

  939. <dt><span class="paramLabel">Parameters:</span></dt>

  940. <dd><code>pos</code> - the position of the bytecode (&gt;= 0). an index into the code

  941.             array.</dd>

  942. <dt><span class="returnLabel">Returns:</span></dt>

  943. <dd>-1 if this information is not available.</dd>

  944. </dl>

  945. </li>

  946. </ul>

  947. <a name="setSuperclass-java.lang.String-">

  948. <!--   -->

  949. </a>

  950. <ul class="blockListLast">

  951. <li class="blockList">

  952. <h4>setSuperclass</h4>

  953. <pre>public&nbsp;void&nbsp;setSuperclass&#8203;(java.lang.String&nbsp;superclass)

  954.                    throws <a href="../../javassist/bytecode/BadBytecode.html" title="class in javassist.bytecode">BadBytecode</a></pre>

  955. <div class="block">Changes a super constructor called by this constructor.

  956.  

  957.  <p>

  958.  This method modifies a call to <code>super()</code>, which should be

  959.  at the head of a constructor body, so that a constructor in a different

  960.  super class is called. This method does not change actual parameters.

  961.  Hence the new super class must have a constructor with the same signature

  962.  as the original one.

  963.  

  964.  <p>

  965.  This method should be called when the super class of the class declaring

  966.  this method is changed.

  967.  

  968.  <p>

  969.  This method does not perform anything unless this <code>MethodInfo</code>

  970.  represents a constructor.</div>

  971. <dl>

  972. <dt><span class="paramLabel">Parameters:</span></dt>

  973. <dd><code>superclass</code> - the new super class</dd>

  974. <dt><span class="throwsLabel">Throws:</span></dt>

  975. <dd><code><a href="../../javassist/bytecode/BadBytecode.html" title="class in javassist.bytecode">BadBytecode</a></code></dd>

  976. </dl>

  977. </li>

  978. </ul>

  979. </li>

  980. </ul>

  981. </li>

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