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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Sat Dec 15 07:40:14 EST 2001 --><TITLE>bcel API: Interface InstructionConstants</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/InstructionConstants.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../org/apache/bcel/generic/IndexedInstruction.html"><B>PREV CLASS</B></A> <A HREF="../../../../org/apache/bcel/generic/InstructionListObserver.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="InstructionConstants.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: <A HREF="#inner_class_summary">INNER</A> | <A HREF="#field_summary">FIELD</A> | CONSTR | METHOD</FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | CONSTR | METHOD</FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.apache.bcel.generic</FONT><BR>Interface InstructionConstants</H2><DL><DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../org/apache/bcel/generic/PUSH.html">PUSH</A>, <A HREF="../../../../org/apache/bcel/generic/InstructionFactory.html">InstructionFactory</A></DD></DL><HR><DL><DT>public interface <B>InstructionConstants</B></DL><P>This interface contains shareable instruction objects. In order to save memory you can use some instructions multiply, since they have an immutable state and are directly derived from Instruction. I.e. they have no instance fields that could be changed. Since some of these instructions like ICONST_0 occur very frequently this can save a lot of time and space. This feature is an adaptation of the FlyWeight design pattern, we just use an array instead of a factory. The Instructions can also accessed directly under their names, so it's possible to write il.append(Instruction.ICONST_0);<P><DL><DT><B>Version: </B><DD>$Id: InstructionConstants.java,v 1.1.1.1 2001/10/29 20:00:18 jvanzyl Exp $</DD><DT><B>Author: </B><DD><A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A></DD></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><A NAME="inner_class_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Inner Class Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static class</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.Clinit.html">InstructionConstants.Clinit</A></B></CODE><BR> </TD></TR></TABLE> <!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Field Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/ArrayInstruction.html">ArrayInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#AALOAD">AALOAD</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/ArrayInstruction.html">ArrayInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#AASTORE">AASTORE</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/Instruction.html">Instruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#ACONST_NULL">ACONST_NULL</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/LocalVariableInstruction.html">LocalVariableInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#ALOAD_0">ALOAD_0</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/LocalVariableInstruction.html">LocalVariableInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#ALOAD_1">ALOAD_1</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/LocalVariableInstruction.html">LocalVariableInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#ALOAD_2">ALOAD_2</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/ReturnInstruction.html">ReturnInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#ARETURN">ARETURN</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/Instruction.html">Instruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#ARRAYLENGTH">ARRAYLENGTH</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/LocalVariableInstruction.html">LocalVariableInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#ASTORE_0">ASTORE_0</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/LocalVariableInstruction.html">LocalVariableInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#ASTORE_1">ASTORE_1</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/LocalVariableInstruction.html">LocalVariableInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#ASTORE_2">ASTORE_2</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/Instruction.html">Instruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#ATHROW">ATHROW</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/ArrayInstruction.html">ArrayInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#BALOAD">BALOAD</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/ArrayInstruction.html">ArrayInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#BASTORE">BASTORE</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/InstructionConstants.Clinit.html">InstructionConstants.Clinit</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#bla">bla</A></B></CODE><BR> Interfaces may have no static initializers, so we simulate this with an inner class.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/ArrayInstruction.html">ArrayInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#CALOAD">CALOAD</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/ArrayInstruction.html">ArrayInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#CASTORE">CASTORE</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/ConversionInstruction.html">ConversionInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#D2F">D2F</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/ConversionInstruction.html">ConversionInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#D2I">D2I</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/ConversionInstruction.html">ConversionInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#D2L">D2L</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../../org/apache/bcel/generic/ArithmeticInstruction.html">ArithmeticInstruction</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/bcel/generic/InstructionConstants.html#DADD">DADD</A></B></CODE><BR> </TD></TR>⌨️ 快捷键说明
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