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.asn1.x9.X9ECParametersHolder
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: org.bouncycastle.asn1.x9.X9ECParametersHolder
  super_class: java.lang.Object
{
  private org.bouncycastle.asn1.x9.X9ECParameters params;
    descriptor: Lorg/bouncycastle/asn1/x9/X9ECParameters;
    flags: (0x0002) ACC_PRIVATE

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.x9.X9ECParametersHolder this
         0: .line 3
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.bouncycastle.asn1.x9.X9ECParametersHolder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/x9/X9ECParametersHolder;

  public org.bouncycastle.asn1.x9.X9ECParameters getParameters();
    descriptor: ()Lorg/bouncycastle/asn1/x9/X9ECParameters;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.x9.X9ECParametersHolder this
         0: .line 9
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x9.X9ECParametersHolder.params:Lorg/bouncycastle/asn1/x9/X9ECParameters;
            ifnonnull 2
         1: .line 11
            aload 0 /* this */
            aload 0 /* this */
            invokevirtual org.bouncycastle.asn1.x9.X9ECParametersHolder.createParameters:()Lorg/bouncycastle/asn1/x9/X9ECParameters;
            putfield org.bouncycastle.asn1.x9.X9ECParametersHolder.params:Lorg/bouncycastle/asn1/x9/X9ECParameters;
         2: .line 14
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.asn1.x9.X9ECParametersHolder.params:Lorg/bouncycastle/asn1/x9/X9ECParameters;
            areturn
        end local 0 // org.bouncycastle.asn1.x9.X9ECParametersHolder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/bouncycastle/asn1/x9/X9ECParametersHolder;

  protected abstract org.bouncycastle.asn1.x9.X9ECParameters createParameters();
    descriptor: ()Lorg/bouncycastle/asn1/x9/X9ECParameters;
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT
}
SourceFile: "X9ECParametersHolder.java"