import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.locks.*;
import java.util.function.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.geom.*;
import javax.imageio.*;
import java.math.*;


import org.apache.bcel.classfile.ClassParser;
import org.apache.bcel.classfile.JavaClass;
import org.apache.bcel.Const;
import org.apache.bcel.generic.*;

import org.apache.bcel.generic.Type;

class main {


 // BCEL








public static void main(final String[] args) throws Exception {
  ClassGen cg = new ClassGen("BadClassFile", "java.lang.Object", null,
    Const.ACC_PUBLIC, new String[0]);
  cg.addEmptyConstructor(Const.ACC_PUBLIC);
    
  ConstantPoolGen cp = cg.getConstantPool();
  InstructionList il = new InstructionList();
  
  MethodGen mg = new MethodGen((short) (Const.ACC_PUBLIC | Const.ACC_STATIC),
    Type.VOID, new Type[] { new ArrayType(new ObjectType("java.lang.String"), 1) },
    null, "main", cg.getClassName(), il, cp);
  il.append(new LDC(cp.addClass("java.lang.Object")));
  il.append(new ASTORE(1));
  il.append(new RETURN());
  
  mg.stripAttributes(true);
  mg.setMaxStack();
  mg.setMaxLocals();
  cg.addMethod(mg.getMethod());

  JavaClass baked = cg.getJavaClass();
  var bytes = baked.getBytes();
  saveBinaryFile_simple(baked.getClassName() + ".class", bytes);
}
static void saveBinaryFile_simple(String fileName, byte[] contents) throws IOException {
  FileOutputStream fileOutputStream = new FileOutputStream(fileName);
  fileOutputStream.write(contents);
  fileOutputStream.close();
}



}