http://www.jcraft.com/jsch/: JSch is a pure Java implementation of SSH2 (JCraft,Inc.) 
public class com.jcraft.jsch.jce.ECDH521 extends com.jcraft.jsch.jce.ECDHN implements com.jcraft.jsch.ECDH
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: com.jcraft.jsch.jce.ECDH521
  super_class: com.jcraft.jsch.jce.ECDHN
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.jcraft.jsch.jce.ECDH521 this
         0: .line 32
            aload 0 /* this */
            invokespecial com.jcraft.jsch.jce.ECDHN.<init>:()V
            return
        end local 0 // com.jcraft.jsch.jce.ECDH521 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/jcraft/jsch/jce/ECDH521;

  public void init();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.jcraft.jsch.jce.ECDH521 this
         0: .line 34
            aload 0 /* this */
            sipush 521
            invokespecial com.jcraft.jsch.jce.ECDHN.init:(I)V
         1: .line 35
            return
        end local 0 // com.jcraft.jsch.jce.ECDH521 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/jcraft/jsch/jce/ECDH521;
    Exceptions:
      throws java.lang.Exception
}
SourceFile: "ECDH521.java"