http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5. 
public final class org.bouncycastle.util.test.NumberParsing
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.bouncycastle.util.test.NumberParsing
  super_class: java.lang.Object
{
  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.util.test.NumberParsing this
         0: .line 8
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 11
            return
        end local 0 // org.bouncycastle.util.test.NumberParsing this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/bouncycastle/util/test/NumberParsing;

  public static long decodeLongFromHex(java.lang.String);
    descriptor: (Ljava/lang/String;)J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // java.lang.String longAsString
         0: .line 15
            aload 0 /* longAsString */
            iconst_1
            invokevirtual java.lang.String.charAt:(I)C
            bipush 120
            if_icmpeq 2
         1: .line 16
            aload 0 /* longAsString */
            iconst_1
            invokevirtual java.lang.String.charAt:(I)C
            bipush 88
            if_icmpne 3
         2: .line 18
      StackMap locals:
      StackMap stack:
            aload 0 /* longAsString */
            iconst_2
            invokevirtual java.lang.String.substring:(I)Ljava/lang/String;
            bipush 16
            invokestatic java.lang.Long.parseLong:(Ljava/lang/String;I)J
            lreturn
         3: .line 21
      StackMap locals:
      StackMap stack:
            aload 0 /* longAsString */
            bipush 16
            invokestatic java.lang.Long.parseLong:(Ljava/lang/String;I)J
            lreturn
        end local 0 // java.lang.String longAsString
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    4     0  longAsString  Ljava/lang/String;
    MethodParameters:
              Name  Flags
      longAsString  

  public static int decodeIntFromHex(java.lang.String);
    descriptor: (Ljava/lang/String;)I
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // java.lang.String intAsString
         0: .line 26
            aload 0 /* intAsString */
            iconst_1
            invokevirtual java.lang.String.charAt:(I)C
            bipush 120
            if_icmpeq 2
         1: .line 27
            aload 0 /* intAsString */
            iconst_1
            invokevirtual java.lang.String.charAt:(I)C
            bipush 88
            if_icmpne 3
         2: .line 29
      StackMap locals:
      StackMap stack:
            aload 0 /* intAsString */
            iconst_2
            invokevirtual java.lang.String.substring:(I)Ljava/lang/String;
            bipush 16
            invokestatic java.lang.Integer.parseInt:(Ljava/lang/String;I)I
            ireturn
         3: .line 32
      StackMap locals:
      StackMap stack:
            aload 0 /* intAsString */
            bipush 16
            invokestatic java.lang.Integer.parseInt:(Ljava/lang/String;I)I
            ireturn
        end local 0 // java.lang.String intAsString
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    4     0  intAsString  Ljava/lang/String;
    MethodParameters:
             Name  Flags
      intAsString  
}
SourceFile: "NumberParsing.java"