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 class org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH extends org.bouncycastle.jce.provider.JDKKeyPairGenerator
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH
  super_class: org.bouncycastle.jce.provider.JDKKeyPairGenerator
{
  private static java.util.Hashtable params;
    descriptor: Ljava/util/Hashtable;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC

  org.bouncycastle.crypto.params.DHKeyGenerationParameters param;
    descriptor: Lorg/bouncycastle/crypto/params/DHKeyGenerationParameters;
    flags: (0x0000) 

  org.bouncycastle.crypto.generators.DHBasicKeyPairGenerator engine;
    descriptor: Lorg/bouncycastle/crypto/generators/DHBasicKeyPairGenerator;
    flags: (0x0000) 

  int strength;
    descriptor: I
    flags: (0x0000) 

  int certainty;
    descriptor: I
    flags: (0x0000) 

  java.security.SecureRandom random;
    descriptor: Ljava/security/SecureRandom;
    flags: (0x0000) 

  boolean initialised;
    descriptor: Z
    flags: (0x0000) 

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 123
            new java.util.Hashtable
            dup
            invokespecial java.util.Hashtable.<init>:()V
            putstatic org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.params:Ljava/util/Hashtable;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH this
         0: .line 134
            aload 0 /* this */
            ldc "DH"
            invokespecial org.bouncycastle.jce.provider.JDKKeyPairGenerator.<init>:(Ljava/lang/String;)V
         1: .line 126
            aload 0 /* this */
            new org.bouncycastle.crypto.generators.DHBasicKeyPairGenerator
            dup
            invokespecial org.bouncycastle.crypto.generators.DHBasicKeyPairGenerator.<init>:()V
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.engine:Lorg/bouncycastle/crypto/generators/DHBasicKeyPairGenerator;
         2: .line 127
            aload 0 /* this */
            sipush 1024
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.strength:I
         3: .line 128
            aload 0 /* this */
            bipush 20
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.certainty:I
         4: .line 129
            aload 0 /* this */
            new java.security.SecureRandom
            dup
            invokespecial java.security.SecureRandom.<init>:()V
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.random:Ljava/security/SecureRandom;
         5: .line 130
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.initialised:Z
         6: .line 135
            return
        end local 0 // org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lorg/bouncycastle/jce/provider/JDKKeyPairGenerator$DH;

  public void initialize(int, java.security.SecureRandom);
    descriptor: (ILjava/security/SecureRandom;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH this
        start local 1 // int strength
        start local 2 // java.security.SecureRandom random
         0: .line 141
            aload 0 /* this */
            iload 1 /* strength */
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.strength:I
         1: .line 142
            aload 0 /* this */
            aload 2 /* random */
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.random:Ljava/security/SecureRandom;
         2: .line 143
            return
        end local 2 // java.security.SecureRandom random
        end local 1 // int strength
        end local 0 // org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lorg/bouncycastle/jce/provider/JDKKeyPairGenerator$DH;
            0    3     1  strength  I
            0    3     2    random  Ljava/security/SecureRandom;
    MethodParameters:
          Name  Flags
      strength  
      random    

  public void initialize(java.security.spec.AlgorithmParameterSpec, java.security.SecureRandom);
    descriptor: (Ljava/security/spec/AlgorithmParameterSpec;Ljava/security/SecureRandom;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=10, locals=4, args_size=3
        start local 0 // org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH this
        start local 1 // java.security.spec.AlgorithmParameterSpec params
        start local 2 // java.security.SecureRandom random
         0: .line 150
            aload 1 /* params */
            instanceof javax.crypto.spec.DHParameterSpec
            ifne 2
         1: .line 152
            new java.security.InvalidAlgorithmParameterException
            dup
            ldc "parameter object not a DHParameterSpec"
            invokespecial java.security.InvalidAlgorithmParameterException.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 154
      StackMap locals:
      StackMap stack:
            aload 1 /* params */
            checkcast javax.crypto.spec.DHParameterSpec
            astore 3 /* dhParams */
        start local 3 // javax.crypto.spec.DHParameterSpec dhParams
         3: .line 156
            aload 0 /* this */
            new org.bouncycastle.crypto.params.DHKeyGenerationParameters
            dup
            aload 2 /* random */
            new org.bouncycastle.crypto.params.DHParameters
            dup
            aload 3 /* dhParams */
            invokevirtual javax.crypto.spec.DHParameterSpec.getP:()Ljava/math/BigInteger;
            aload 3 /* dhParams */
            invokevirtual javax.crypto.spec.DHParameterSpec.getG:()Ljava/math/BigInteger;
            aconst_null
            aload 3 /* dhParams */
            invokevirtual javax.crypto.spec.DHParameterSpec.getL:()I
            invokespecial org.bouncycastle.crypto.params.DHParameters.<init>:(Ljava/math/BigInteger;Ljava/math/BigInteger;Ljava/math/BigInteger;I)V
            invokespecial org.bouncycastle.crypto.params.DHKeyGenerationParameters.<init>:(Ljava/security/SecureRandom;Lorg/bouncycastle/crypto/params/DHParameters;)V
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.param:Lorg/bouncycastle/crypto/params/DHKeyGenerationParameters;
         4: .line 158
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.engine:Lorg/bouncycastle/crypto/generators/DHBasicKeyPairGenerator;
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.param:Lorg/bouncycastle/crypto/params/DHKeyGenerationParameters;
            invokevirtual org.bouncycastle.crypto.generators.DHBasicKeyPairGenerator.init:(Lorg/bouncycastle/crypto/KeyGenerationParameters;)V
         5: .line 159
            aload 0 /* this */
            iconst_1
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.initialised:Z
         6: .line 160
            return
        end local 3 // javax.crypto.spec.DHParameterSpec dhParams
        end local 2 // java.security.SecureRandom random
        end local 1 // java.security.spec.AlgorithmParameterSpec params
        end local 0 // org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    7     0      this  Lorg/bouncycastle/jce/provider/JDKKeyPairGenerator$DH;
            0    7     1    params  Ljava/security/spec/AlgorithmParameterSpec;
            0    7     2    random  Ljava/security/SecureRandom;
            3    7     3  dhParams  Ljavax/crypto/spec/DHParameterSpec;
    Exceptions:
      throws java.security.InvalidAlgorithmParameterException
    MethodParameters:
        Name  Flags
      params  
      random  

  public java.security.KeyPair generateKeyPair();
    descriptor: ()Ljava/security/KeyPair;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=4, args_size=1
        start local 0 // org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH this
         0: .line 164
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.initialised:Z
            ifne 11
         1: .line 166
            new java.lang.Integer
            dup
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.strength:I
            invokespecial java.lang.Integer.<init>:(I)V
            astore 1 /* paramStrength */
        start local 1 // java.lang.Integer paramStrength
         2: .line 168
            getstatic org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.params:Ljava/util/Hashtable;
            aload 1 /* paramStrength */
            invokevirtual java.util.Hashtable.containsKey:(Ljava/lang/Object;)Z
            ifeq 5
         3: .line 170
            aload 0 /* this */
            getstatic org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.params:Ljava/util/Hashtable;
            aload 1 /* paramStrength */
            invokevirtual java.util.Hashtable.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast org.bouncycastle.crypto.params.DHKeyGenerationParameters
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.param:Lorg/bouncycastle/crypto/params/DHKeyGenerationParameters;
         4: .line 171
            goto 9
         5: .line 174
      StackMap locals: java.lang.Integer
      StackMap stack:
            new org.bouncycastle.crypto.generators.DHParametersGenerator
            dup
            invokespecial org.bouncycastle.crypto.generators.DHParametersGenerator.<init>:()V
            astore 2 /* pGen */
        start local 2 // org.bouncycastle.crypto.generators.DHParametersGenerator pGen
         6: .line 176
            aload 2 /* pGen */
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.strength:I
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.certainty:I
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.random:Ljava/security/SecureRandom;
            invokevirtual org.bouncycastle.crypto.generators.DHParametersGenerator.init:(IILjava/security/SecureRandom;)V
         7: .line 178
            aload 0 /* this */
            new org.bouncycastle.crypto.params.DHKeyGenerationParameters
            dup
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.random:Ljava/security/SecureRandom;
            aload 2 /* pGen */
            invokevirtual org.bouncycastle.crypto.generators.DHParametersGenerator.generateParameters:()Lorg/bouncycastle/crypto/params/DHParameters;
            invokespecial org.bouncycastle.crypto.params.DHKeyGenerationParameters.<init>:(Ljava/security/SecureRandom;Lorg/bouncycastle/crypto/params/DHParameters;)V
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.param:Lorg/bouncycastle/crypto/params/DHKeyGenerationParameters;
         8: .line 180
            getstatic org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.params:Ljava/util/Hashtable;
            aload 1 /* paramStrength */
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.param:Lorg/bouncycastle/crypto/params/DHKeyGenerationParameters;
            invokevirtual java.util.Hashtable.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        end local 2 // org.bouncycastle.crypto.generators.DHParametersGenerator pGen
         9: .line 183
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.engine:Lorg/bouncycastle/crypto/generators/DHBasicKeyPairGenerator;
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.param:Lorg/bouncycastle/crypto/params/DHKeyGenerationParameters;
            invokevirtual org.bouncycastle.crypto.generators.DHBasicKeyPairGenerator.init:(Lorg/bouncycastle/crypto/KeyGenerationParameters;)V
        10: .line 185
            aload 0 /* this */
            iconst_1
            putfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.initialised:Z
        end local 1 // java.lang.Integer paramStrength
        11: .line 188
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH.engine:Lorg/bouncycastle/crypto/generators/DHBasicKeyPairGenerator;
            invokevirtual org.bouncycastle.crypto.generators.DHBasicKeyPairGenerator.generateKeyPair:()Lorg/bouncycastle/crypto/AsymmetricCipherKeyPair;
            astore 1 /* pair */
        start local 1 // org.bouncycastle.crypto.AsymmetricCipherKeyPair pair
        12: .line 189
            aload 1 /* pair */
            invokevirtual org.bouncycastle.crypto.AsymmetricCipherKeyPair.getPublic:()Lorg/bouncycastle/crypto/CipherParameters;
            checkcast org.bouncycastle.crypto.params.DHPublicKeyParameters
            astore 2 /* pub */
        start local 2 // org.bouncycastle.crypto.params.DHPublicKeyParameters pub
        13: .line 190
            aload 1 /* pair */
            invokevirtual org.bouncycastle.crypto.AsymmetricCipherKeyPair.getPrivate:()Lorg/bouncycastle/crypto/CipherParameters;
            checkcast org.bouncycastle.crypto.params.DHPrivateKeyParameters
            astore 3 /* priv */
        start local 3 // org.bouncycastle.crypto.params.DHPrivateKeyParameters priv
        14: .line 192
            new java.security.KeyPair
            dup
            new org.bouncycastle.jce.provider.JCEDHPublicKey
            dup
            aload 2 /* pub */
            invokespecial org.bouncycastle.jce.provider.JCEDHPublicKey.<init>:(Lorg/bouncycastle/crypto/params/DHPublicKeyParameters;)V
        15: .line 193
            new org.bouncycastle.jce.provider.JCEDHPrivateKey
            dup
            aload 3 /* priv */
            invokespecial org.bouncycastle.jce.provider.JCEDHPrivateKey.<init>:(Lorg/bouncycastle/crypto/params/DHPrivateKeyParameters;)V
        16: .line 192
            invokespecial java.security.KeyPair.<init>:(Ljava/security/PublicKey;Ljava/security/PrivateKey;)V
            areturn
        end local 3 // org.bouncycastle.crypto.params.DHPrivateKeyParameters priv
        end local 2 // org.bouncycastle.crypto.params.DHPublicKeyParameters pub
        end local 1 // org.bouncycastle.crypto.AsymmetricCipherKeyPair pair
        end local 0 // org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   17     0           this  Lorg/bouncycastle/jce/provider/JDKKeyPairGenerator$DH;
            2   11     1  paramStrength  Ljava/lang/Integer;
            6    9     2           pGen  Lorg/bouncycastle/crypto/generators/DHParametersGenerator;
           12   17     1           pair  Lorg/bouncycastle/crypto/AsymmetricCipherKeyPair;
           13   17     2            pub  Lorg/bouncycastle/crypto/params/DHPublicKeyParameters;
           14   17     3           priv  Lorg/bouncycastle/crypto/params/DHPrivateKeyParameters;
}
SourceFile: "JDKKeyPairGenerator.java"
NestHost: org.bouncycastle.jce.provider.JDKKeyPairGenerator
InnerClasses:
  public DH = org.bouncycastle.jce.provider.JDKKeyPairGenerator$DH of org.bouncycastle.jce.provider.JDKKeyPairGenerator