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.crypto.generators.ElGamalKeyPairGenerator implements org.bouncycastle.crypto.AsymmetricCipherKeyPairGenerator
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.crypto.generators.ElGamalKeyPairGenerator
  super_class: java.lang.Object
{
  private org.bouncycastle.crypto.params.ElGamalKeyGenerationParameters param;
    descriptor: Lorg/bouncycastle/crypto/params/ElGamalKeyGenerationParameters;
    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.crypto.generators.ElGamalKeyPairGenerator this
         0: .line 20
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.bouncycastle.crypto.generators.ElGamalKeyPairGenerator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/crypto/generators/ElGamalKeyPairGenerator;

  public void init(org.bouncycastle.crypto.KeyGenerationParameters);
    descriptor: (Lorg/bouncycastle/crypto/KeyGenerationParameters;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.crypto.generators.ElGamalKeyPairGenerator this
        start local 1 // org.bouncycastle.crypto.KeyGenerationParameters param
         0: .line 28
            aload 0 /* this */
            aload 1 /* param */
            checkcast org.bouncycastle.crypto.params.ElGamalKeyGenerationParameters
            putfield org.bouncycastle.crypto.generators.ElGamalKeyPairGenerator.param:Lorg/bouncycastle/crypto/params/ElGamalKeyGenerationParameters;
         1: .line 29
            return
        end local 1 // org.bouncycastle.crypto.KeyGenerationParameters param
        end local 0 // org.bouncycastle.crypto.generators.ElGamalKeyPairGenerator this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lorg/bouncycastle/crypto/generators/ElGamalKeyPairGenerator;
            0    2     1  param  Lorg/bouncycastle/crypto/KeyGenerationParameters;
    MethodParameters:
       Name  Flags
      param  

  public org.bouncycastle.crypto.AsymmetricCipherKeyPair generateKeyPair();
    descriptor: ()Lorg/bouncycastle/crypto/AsymmetricCipherKeyPair;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=6, args_size=1
        start local 0 // org.bouncycastle.crypto.generators.ElGamalKeyPairGenerator this
         0: .line 33
            getstatic org.bouncycastle.crypto.generators.DHKeyGeneratorHelper.INSTANCE:Lorg/bouncycastle/crypto/generators/DHKeyGeneratorHelper;
            astore 1 /* helper */
        start local 1 // org.bouncycastle.crypto.generators.DHKeyGeneratorHelper helper
         1: .line 34
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.ElGamalKeyPairGenerator.param:Lorg/bouncycastle/crypto/params/ElGamalKeyGenerationParameters;
            invokevirtual org.bouncycastle.crypto.params.ElGamalKeyGenerationParameters.getParameters:()Lorg/bouncycastle/crypto/params/ElGamalParameters;
            astore 2 /* egp */
        start local 2 // org.bouncycastle.crypto.params.ElGamalParameters egp
         2: .line 35
            new org.bouncycastle.crypto.params.DHParameters
            dup
            aload 2 /* egp */
            invokevirtual org.bouncycastle.crypto.params.ElGamalParameters.getP:()Ljava/math/BigInteger;
            aload 2 /* egp */
            invokevirtual org.bouncycastle.crypto.params.ElGamalParameters.getG:()Ljava/math/BigInteger;
            aconst_null
            aload 2 /* egp */
            invokevirtual org.bouncycastle.crypto.params.ElGamalParameters.getL:()I
            invokespecial org.bouncycastle.crypto.params.DHParameters.<init>:(Ljava/math/BigInteger;Ljava/math/BigInteger;Ljava/math/BigInteger;I)V
            astore 3 /* dhp */
        start local 3 // org.bouncycastle.crypto.params.DHParameters dhp
         3: .line 37
            aload 1 /* helper */
            aload 3 /* dhp */
            aload 0 /* this */
            getfield org.bouncycastle.crypto.generators.ElGamalKeyPairGenerator.param:Lorg/bouncycastle/crypto/params/ElGamalKeyGenerationParameters;
            invokevirtual org.bouncycastle.crypto.params.ElGamalKeyGenerationParameters.getRandom:()Ljava/security/SecureRandom;
            invokevirtual org.bouncycastle.crypto.generators.DHKeyGeneratorHelper.calculatePrivate:(Lorg/bouncycastle/crypto/params/DHParameters;Ljava/security/SecureRandom;)Ljava/math/BigInteger;
            astore 4 /* x */
        start local 4 // java.math.BigInteger x
         4: .line 38
            aload 1 /* helper */
            aload 3 /* dhp */
            aload 4 /* x */
            invokevirtual org.bouncycastle.crypto.generators.DHKeyGeneratorHelper.calculatePublic:(Lorg/bouncycastle/crypto/params/DHParameters;Ljava/math/BigInteger;)Ljava/math/BigInteger;
            astore 5 /* y */
        start local 5 // java.math.BigInteger y
         5: .line 40
            new org.bouncycastle.crypto.AsymmetricCipherKeyPair
            dup
         6: .line 41
            new org.bouncycastle.crypto.params.ElGamalPublicKeyParameters
            dup
            aload 5 /* y */
            aload 2 /* egp */
            invokespecial org.bouncycastle.crypto.params.ElGamalPublicKeyParameters.<init>:(Ljava/math/BigInteger;Lorg/bouncycastle/crypto/params/ElGamalParameters;)V
         7: .line 42
            new org.bouncycastle.crypto.params.ElGamalPrivateKeyParameters
            dup
            aload 4 /* x */
            aload 2 /* egp */
            invokespecial org.bouncycastle.crypto.params.ElGamalPrivateKeyParameters.<init>:(Ljava/math/BigInteger;Lorg/bouncycastle/crypto/params/ElGamalParameters;)V
         8: .line 40
            invokespecial org.bouncycastle.crypto.AsymmetricCipherKeyPair.<init>:(Lorg/bouncycastle/crypto/CipherParameters;Lorg/bouncycastle/crypto/CipherParameters;)V
            areturn
        end local 5 // java.math.BigInteger y
        end local 4 // java.math.BigInteger x
        end local 3 // org.bouncycastle.crypto.params.DHParameters dhp
        end local 2 // org.bouncycastle.crypto.params.ElGamalParameters egp
        end local 1 // org.bouncycastle.crypto.generators.DHKeyGeneratorHelper helper
        end local 0 // org.bouncycastle.crypto.generators.ElGamalKeyPairGenerator this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    9     0    this  Lorg/bouncycastle/crypto/generators/ElGamalKeyPairGenerator;
            1    9     1  helper  Lorg/bouncycastle/crypto/generators/DHKeyGeneratorHelper;
            2    9     2     egp  Lorg/bouncycastle/crypto/params/ElGamalParameters;
            3    9     3     dhp  Lorg/bouncycastle/crypto/params/DHParameters;
            4    9     4       x  Ljava/math/BigInteger;
            5    9     5       y  Ljava/math/BigInteger;
}
SourceFile: "ElGamalKeyPairGenerator.java"