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diff --git a/src/java/org/apache/bcel/generic/INVOKEINTERFACE.java b/src/java/org/apache/bcel/generic/INVOKEINTERFACE.java
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+++ b/src/java/org/apache/bcel/generic/INVOKEINTERFACE.java
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+package org.apache.bcel.generic;
+
+/* ====================================================================
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2001 The Apache Software Foundation.  All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The end-user documentation included with the redistribution,
+ *    if any, must include the following acknowledgment:
+ *       "This product includes software developed by the
+ *        Apache Software Foundation (http://www.apache.org/)."
+ *    Alternately, this acknowledgment may appear in the software itself,
+ *    if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Apache" and "Apache Software Foundation" and
+ *    "Apache BCEL" must not be used to endorse or promote products
+ *    derived from this software without prior written permission. For
+ *    written permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache",
+ *    "Apache BCEL", nor may "Apache" appear in their name, without
+ *    prior written permission of the Apache Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ */
+import org.apache.bcel.classfile.ConstantPool;
+import org.apache.bcel.Constants;
+import org.apache.bcel.ExceptionConstants;
+
+import java.io.*;
+import org.apache.bcel.util.ByteSequence;
+
+/** 
+ * INVOKEINTERFACE - Invoke interface method
+ * <PRE>Stack: ..., objectref, [arg1, [arg2 ...]] -&gt; ...</PRE>
+ *
+ * @version $Id$
+ * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
+ */
+public final class INVOKEINTERFACE extends InvokeInstruction {
+  private int nargs; // Number of arguments on stack (number of stack slots), called "count" in vmspec2
+
+  /**
+   * Empty constructor needed for the Class.newInstance() statement in
+   * Instruction.readInstruction(). Not to be used otherwise.
+   */
+  INVOKEINTERFACE() {}
+
+  public INVOKEINTERFACE(int index, int nargs) {
+    super(Constants.INVOKEINTERFACE, index);
+    length = 5;
+
+    if(nargs < 1)
+      throw new ClassGenException("Number of arguments must be > 0 " + nargs);
+
+    this.nargs = nargs;
+  }
+
+  /**
+   * Dump instruction as byte code to stream out.
+   * @param out Output stream
+   */
+  public void dump(DataOutputStream out) throws IOException {
+    out.writeByte(opcode);
+    out.writeShort(index);
+    out.writeByte(nargs);
+    out.writeByte(0);
+  }
+
+  /**
+   * The <B>count</B> argument according to the Java Language Specification,
+   * Second Edition.
+   */
+  public int getCount() { return nargs; }
+
+  /**
+   * Read needed data (i.e., index) from file.
+   */
+  protected void initFromFile(ByteSequence bytes, boolean wide)
+       throws IOException
+  {
+    super.initFromFile(bytes, wide);
+
+    length = 5;
+    nargs = bytes.readUnsignedByte();
+    bytes.readByte(); // Skip 0 byte
+  }
+
+  /**
+   * @return mnemonic for instruction with symbolic references resolved
+   */
+  public String toString(ConstantPool cp) {
+    return super.toString(cp) + " " + nargs;
+  }
+
+  public int consumeStack(ConstantPoolGen cpg) { // nargs is given in byte-code
+    return nargs;  // nargs includes this reference
+  }
+
+  public Class[] getExceptions() {
+    Class[] cs = new Class[4 + ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length];
+
+    System.arraycopy(ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION, 0,
+		     cs, 0, ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length);
+
+    cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+3] = ExceptionConstants.INCOMPATIBLE_CLASS_CHANGE_ERROR;
+    cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+2] = ExceptionConstants.ILLEGAL_ACCESS_ERROR;
+    cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+1] = ExceptionConstants.ABSTRACT_METHOD_ERROR;
+    cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length]   = ExceptionConstants.UNSATISFIED_LINK_ERROR;
+
+    return cs;
+  }
+
+  /**
+   * Call corresponding visitor method(s). The order is:
+   * Call visitor methods of implemented interfaces first, then
+   * call methods according to the class hierarchy in descending order,
+   * i.e., the most specific visitXXX() call comes last.
+   *
+   * @param v Visitor object
+   */
+  public void accept(Visitor v) {
+    v.visitExceptionThrower(this);
+    v.visitTypedInstruction(this);
+    v.visitStackConsumer(this);
+    v.visitStackProducer(this);
+    v.visitLoadClass(this);
+    v.visitCPInstruction(this);
+    v.visitFieldOrMethod(this);
+    v.visitInvokeInstruction(this);
+    v.visitINVOKEINTERFACE(this);
+  }
+}