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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"><html><head><title>VM Spec </title></head><body BGCOLOR=#eeeeff text=#000000 LINK=#0000ff VLINK=#000077 ALINK=#ff0000><table width=100%><tr><td><a href="VMSpecTOC.doc.html">Contents</a> | <a href="VMSpecIX.fm19.html">Prev</a> | <a href="VMSpecIX.fm21.html">Next</a> | <a href="VMSpecIX.fm.html">Index</a></td><td align=right><i><i>The Java<sup><font size=-2>TM</font></sup> Virtual Machine Specification</i></i></td></tr></table><hr><br> <a href="VMSpecIX.fm.html">symbols</a><a href="VMSpecIX.fm1.html">A</a><a href="VMSpecIX.fm2.html">B</a><a href="VMSpecIX.fm3.html">C</a><a href="VMSpecIX.fm4.html">D</a><a href="VMSpecIX.fm5.html">E</a><a href="VMSpecIX.fm6.html">F</a><a href="VMSpecIX.fm7.html">G</a><a href="VMSpecIX.fm8.html">H</a><a href="VMSpecIX.fm9.html">I</a><a href="VMSpecIX.fm10.html">J</a><a href="VMSpecIX.fm11.html">L</a><a href="VMSpecIX.fm12.html">M</a><a href="VMSpecIX.fm13.html">N</a><a href="VMSpecIX.fm14.html">O</a><a href="VMSpecIX.fm15.html">P</a><a href="VMSpecIX.fm16.html">Q</a><a href="VMSpecIX.fm17.html">R</a><a href="VMSpecIX.fm18.html">S</a><a href="VMSpecIX.fm19.html">T</a><a href="VMSpecIX.fm20.html">U</a><a href="VMSpecIX.fm21.html">V</a><a href="VMSpecIX.fm22.html">W</a><a href="VMSpecIX.fm23.html">Z</a><hr><a name="6961650"></a><center><h1> U</h1></center><dl><dt><b>u1</b><dl><a name="6961653"></a><dt>as class<a href="ClassFile.doc.html#6289"> file data type, 93</a></dl><dt><b>u2</b><dl><a name="6961656"></a><dt>as class<a href="ClassFile.doc.html#6289"> file data type, 93</a></dl><dt><b>u4</b><dl><a name="6961659"></a><dt>as class<a href="ClassFile.doc.html#6289"> file data type, 93</a></dl><dt><b><strong>underflow</strong></b><dl><a name="6961662"></a><dt><a href="Overview.doc.html#14562">floating-point, Java virtual machine handling, 85</a><a name="6961664"></a><dt><a href="Overview.doc.html#31340">integer data types, not signaled by Java virtual machine, 85</a></dl><dt><b><strong>Unicode</strong></b><dl><a name="6961667"></a><dt><a href="Concepts.doc.html#25310">bibliographic reference, 5</a><a name="6961669"></a><dt><a href="Concepts.doc.html#25310">characteristics, 5</a></dl><dt><b>UnknownError</b><dl><a name="6961672"></a><dt><a href="Concepts.doc.html#25189">as Java virtual machine error, 46</a></dl><dt><b><strong>unloading</strong></b><dl><a name="6961675"></a><dt><a href="Concepts.doc.html#32203">class or interface, 57</a></dl><dt><b>UnsatisfiedLinkError</b><dl><a name="6961678"></a><dt><em>See also</em> binding; LinkageError; native method<a name="6961680"></a><dt><a href="Concepts.doc.html#28429">definition, 45</a><a name="6961682"></a><dt>thrown by<dl><a name="6961683"></a><dt>invokeinterface<a href="Instructions2.doc6.html#invokeinterface">, 282</a><a name="6961685"></a><dt>invokespecial<a href="Instructions2.doc6.html#invokespecial">, 287</a><a name="6961687"></a><dt>invokestatic<a href="Instructions2.doc6.html#invokestatic">, 290</a><a name="6961689"></a><dt>invokevirtual<a href="Instructions2.doc11.html#putfield">, 293</a></dl></dl><dt><b>UnsupportedClassVersionError</b><dl><a name="6961692"></a><dt><a href="Concepts.doc.html#32605">definition, 49</a></dl><dt><b><strong>UTF-8 format</strong></b><dl><a name="6961695"></a><dt><em>See also</em> CONSTANT_Utf8_info structure<a name="6961697"></a><dt><a href="ClassFile.doc.html#6111">bibliographic reference, 111</a><a name="6961699"></a><dt><a href="ClassFile.doc.html#6111">standard, differences between Java virtual machine UTF-8 strings and, 111</a></dl></dl><hr><!-- This inserts footnotes--><p><a href="VMSpecTOC.doc.html">Contents</a> | <a href="VMSpecIX.fm19.html">Prev</a> | <a href="VMSpecIX.fm21.html">Next</a> | <a href="VMSpecIX.fm.html">Index</a><p><font size="-1"><i>The Java</i><sup><font size=-2>TM</font></sup><i> Virtual Machine Specification </i><br><!-- HTML generated by Suzette Pelouch on April 06, 1999 --><i><a href="Copyright.doc.html">Copyright © 1999 Sun Microsystems, Inc.</a>All rights reserved</i><br>Please send any comments or corrections to <a href="mailto:jvm@java.sun.com">jvm@java.sun.com</a></font></body></html>⌨️ 快捷键说明
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