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. 
class org.bouncycastle.jce.ECKeyUtil$UnexpectedException extends java.lang.RuntimeException
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.bouncycastle.jce.ECKeyUtil$UnexpectedException
  super_class: java.lang.RuntimeException
{
  private java.lang.Throwable cause;
    descriptor: Ljava/lang/Throwable;
    flags: (0x0002) ACC_PRIVATE

  void <init>(java.lang.Throwable);
    descriptor: (Ljava/lang/Throwable;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.jce.ECKeyUtil$UnexpectedException this
        start local 1 // java.lang.Throwable cause
         0: .line 220
            aload 0 /* this */
            aload 1 /* cause */
            invokevirtual java.lang.Throwable.toString:()Ljava/lang/String;
            invokespecial java.lang.RuntimeException.<init>:(Ljava/lang/String;)V
         1: .line 222
            aload 0 /* this */
            aload 1 /* cause */
            putfield org.bouncycastle.jce.ECKeyUtil$UnexpectedException.cause:Ljava/lang/Throwable;
         2: .line 223
            return
        end local 1 // java.lang.Throwable cause
        end local 0 // org.bouncycastle.jce.ECKeyUtil$UnexpectedException this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lorg/bouncycastle/jce/ECKeyUtil$UnexpectedException;
            0    3     1  cause  Ljava/lang/Throwable;
    MethodParameters:
       Name  Flags
      cause  

  public java.lang.Throwable getCause();
    descriptor: ()Ljava/lang/Throwable;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.jce.ECKeyUtil$UnexpectedException this
         0: .line 227
            aload 0 /* this */
            getfield org.bouncycastle.jce.ECKeyUtil$UnexpectedException.cause:Ljava/lang/Throwable;
            areturn
        end local 0 // org.bouncycastle.jce.ECKeyUtil$UnexpectedException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/jce/ECKeyUtil$UnexpectedException;
}
SourceFile: "ECKeyUtil.java"
NestHost: org.bouncycastle.jce.ECKeyUtil
InnerClasses:
  private UnexpectedException = org.bouncycastle.jce.ECKeyUtil$UnexpectedException of org.bouncycastle.jce.ECKeyUtil