http://netty.io/netty-all/: Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients. (The Netty Project) 
public final class io.netty.example.udt.echo.rendezvous.Config
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: io.netty.example.udt.echo.rendezvous.Config
  super_class: java.lang.Object
{
  public static final java.lang.String hostOne;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "localhost"

  public static final int portOne;
    descriptor: I
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 1231

  public static final java.lang.String hostTwo;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "localhost"

  public static final int portTwo;
    descriptor: I
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 1232

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.example.udt.echo.rendezvous.Config this
         0: .line 23
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 24
            return
        end local 0 // io.netty.example.udt.echo.rendezvous.Config this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/example/udt/echo/rendezvous/Config;
}
SourceFile: "Config.java"