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 abstract class org.bouncycastle.math.ec.ECFieldElement implements org.bouncycastle.math.ec.ECConstants
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: org.bouncycastle.math.ec.ECFieldElement
  super_class: java.lang.Object
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.math.ec.ECFieldElement this
         0: .line 6
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.bouncycastle.math.ec.ECFieldElement this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/math/ec/ECFieldElement;

  public abstract java.math.BigInteger toBigInteger();
    descriptor: ()Ljava/math/BigInteger;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract java.lang.String getFieldName();
    descriptor: ()Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract int getFieldSize();
    descriptor: ()I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract org.bouncycastle.math.ec.ECFieldElement add(org.bouncycastle.math.ec.ECFieldElement);
    descriptor: (Lorg/bouncycastle/math/ec/ECFieldElement;)Lorg/bouncycastle/math/ec/ECFieldElement;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      b     

  public abstract org.bouncycastle.math.ec.ECFieldElement subtract(org.bouncycastle.math.ec.ECFieldElement);
    descriptor: (Lorg/bouncycastle/math/ec/ECFieldElement;)Lorg/bouncycastle/math/ec/ECFieldElement;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      b     

  public abstract org.bouncycastle.math.ec.ECFieldElement multiply(org.bouncycastle.math.ec.ECFieldElement);
    descriptor: (Lorg/bouncycastle/math/ec/ECFieldElement;)Lorg/bouncycastle/math/ec/ECFieldElement;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      b     

  public abstract org.bouncycastle.math.ec.ECFieldElement divide(org.bouncycastle.math.ec.ECFieldElement);
    descriptor: (Lorg/bouncycastle/math/ec/ECFieldElement;)Lorg/bouncycastle/math/ec/ECFieldElement;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      b     

  public abstract org.bouncycastle.math.ec.ECFieldElement negate();
    descriptor: ()Lorg/bouncycastle/math/ec/ECFieldElement;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract org.bouncycastle.math.ec.ECFieldElement square();
    descriptor: ()Lorg/bouncycastle/math/ec/ECFieldElement;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract org.bouncycastle.math.ec.ECFieldElement invert();
    descriptor: ()Lorg/bouncycastle/math/ec/ECFieldElement;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract org.bouncycastle.math.ec.ECFieldElement sqrt();
    descriptor: ()Lorg/bouncycastle/math/ec/ECFieldElement;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.bouncycastle.math.ec.ECFieldElement this
         0: .line 24
            aload 0 /* this */
            invokevirtual org.bouncycastle.math.ec.ECFieldElement.toBigInteger:()Ljava/math/BigInteger;
            iconst_2
            invokevirtual java.math.BigInteger.toString:(I)Ljava/lang/String;
            areturn
        end local 0 // org.bouncycastle.math.ec.ECFieldElement this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/math/ec/ECFieldElement;
}
SourceFile: "ECFieldElement.java"
NestMembers:
  org.bouncycastle.math.ec.ECFieldElement$F2m  org.bouncycastle.math.ec.ECFieldElement$Fp
InnerClasses:
  public F2m = org.bouncycastle.math.ec.ECFieldElement$F2m of org.bouncycastle.math.ec.ECFieldElement
  public Fp = org.bouncycastle.math.ec.ECFieldElement$Fp of org.bouncycastle.math.ec.ECFieldElement