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 class io.netty.handler.codec.dns.DnsOpCode implements java.lang.Comparable<io.netty.handler.codec.dns.DnsOpCode>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.netty.handler.codec.dns.DnsOpCode
  super_class: java.lang.Object
{
  public static final io.netty.handler.codec.dns.DnsOpCode QUERY;
    descriptor: Lio/netty/handler/codec/dns/DnsOpCode;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final io.netty.handler.codec.dns.DnsOpCode IQUERY;
    descriptor: Lio/netty/handler/codec/dns/DnsOpCode;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final io.netty.handler.codec.dns.DnsOpCode STATUS;
    descriptor: Lio/netty/handler/codec/dns/DnsOpCode;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final io.netty.handler.codec.dns.DnsOpCode NOTIFY;
    descriptor: Lio/netty/handler/codec/dns/DnsOpCode;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final io.netty.handler.codec.dns.DnsOpCode UPDATE;
    descriptor: Lio/netty/handler/codec/dns/DnsOpCode;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  private final byte byteValue;
    descriptor: B
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.lang.String name;
    descriptor: Ljava/lang/String;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private java.lang.String text;
    descriptor: Ljava/lang/String;
    flags: (0x0002) ACC_PRIVATE

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=4, locals=0, args_size=0
         0: .line 31
            new io.netty.handler.codec.dns.DnsOpCode
            dup
            iconst_0
            ldc "QUERY"
            invokespecial io.netty.handler.codec.dns.DnsOpCode.<init>:(ILjava/lang/String;)V
            putstatic io.netty.handler.codec.dns.DnsOpCode.QUERY:Lio/netty/handler/codec/dns/DnsOpCode;
         1: .line 36
            new io.netty.handler.codec.dns.DnsOpCode
            dup
            iconst_1
            ldc "IQUERY"
            invokespecial io.netty.handler.codec.dns.DnsOpCode.<init>:(ILjava/lang/String;)V
            putstatic io.netty.handler.codec.dns.DnsOpCode.IQUERY:Lio/netty/handler/codec/dns/DnsOpCode;
         2: .line 41
            new io.netty.handler.codec.dns.DnsOpCode
            dup
            iconst_2
            ldc "STATUS"
            invokespecial io.netty.handler.codec.dns.DnsOpCode.<init>:(ILjava/lang/String;)V
            putstatic io.netty.handler.codec.dns.DnsOpCode.STATUS:Lio/netty/handler/codec/dns/DnsOpCode;
         3: .line 46
            new io.netty.handler.codec.dns.DnsOpCode
            dup
            iconst_4
            ldc "NOTIFY"
            invokespecial io.netty.handler.codec.dns.DnsOpCode.<init>:(ILjava/lang/String;)V
            putstatic io.netty.handler.codec.dns.DnsOpCode.NOTIFY:Lio/netty/handler/codec/dns/DnsOpCode;
         4: .line 51
            new io.netty.handler.codec.dns.DnsOpCode
            dup
            iconst_5
            ldc "UPDATE"
            invokespecial io.netty.handler.codec.dns.DnsOpCode.<init>:(ILjava/lang/String;)V
            putstatic io.netty.handler.codec.dns.DnsOpCode.UPDATE:Lio/netty/handler/codec/dns/DnsOpCode;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static io.netty.handler.codec.dns.DnsOpCode valueOf(int);
    descriptor: (I)Lio/netty/handler/codec/dns/DnsOpCode;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // int b
         0: .line 57
            iload 0 /* b */
            tableswitch { // 0 - 5
                    0: 1
                    1: 2
                    2: 3
                    3: 6
                    4: 4
                    5: 5
              default: 6
          }
         1: .line 59
      StackMap locals:
      StackMap stack:
            getstatic io.netty.handler.codec.dns.DnsOpCode.QUERY:Lio/netty/handler/codec/dns/DnsOpCode;
            areturn
         2: .line 61
      StackMap locals:
      StackMap stack:
            getstatic io.netty.handler.codec.dns.DnsOpCode.IQUERY:Lio/netty/handler/codec/dns/DnsOpCode;
            areturn
         3: .line 63
      StackMap locals:
      StackMap stack:
            getstatic io.netty.handler.codec.dns.DnsOpCode.STATUS:Lio/netty/handler/codec/dns/DnsOpCode;
            areturn
         4: .line 65
      StackMap locals:
      StackMap stack:
            getstatic io.netty.handler.codec.dns.DnsOpCode.NOTIFY:Lio/netty/handler/codec/dns/DnsOpCode;
            areturn
         5: .line 67
      StackMap locals:
      StackMap stack:
            getstatic io.netty.handler.codec.dns.DnsOpCode.UPDATE:Lio/netty/handler/codec/dns/DnsOpCode;
            areturn
         6: .line 70
      StackMap locals:
      StackMap stack:
            new io.netty.handler.codec.dns.DnsOpCode
            dup
            iload 0 /* b */
            invokespecial io.netty.handler.codec.dns.DnsOpCode.<init>:(I)V
            areturn
        end local 0 // int b
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0     b  I
    MethodParameters:
      Name  Flags
      b     

  private void <init>(int);
    descriptor: (I)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.dns.DnsOpCode this
        start local 1 // int byteValue
         0: .line 78
            aload 0 /* this */
            iload 1 /* byteValue */
            ldc "UNKNOWN"
            invokespecial io.netty.handler.codec.dns.DnsOpCode.<init>:(ILjava/lang/String;)V
         1: .line 79
            return
        end local 1 // int byteValue
        end local 0 // io.netty.handler.codec.dns.DnsOpCode this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    2     0       this  Lio/netty/handler/codec/dns/DnsOpCode;
            0    2     1  byteValue  I
    MethodParameters:
           Name  Flags
      byteValue  

  public void <init>(int, java.lang.String);
    descriptor: (ILjava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // io.netty.handler.codec.dns.DnsOpCode this
        start local 1 // int byteValue
        start local 2 // java.lang.String name
         0: .line 81
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 82
            aload 0 /* this */
            iload 1 /* byteValue */
            i2b
            putfield io.netty.handler.codec.dns.DnsOpCode.byteValue:B
         2: .line 83
            aload 0 /* this */
            aload 2 /* name */
            ldc "name"
            invokestatic io.netty.util.internal.ObjectUtil.checkNotNull:(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;
            checkcast java.lang.String
            putfield io.netty.handler.codec.dns.DnsOpCode.name:Ljava/lang/String;
         3: .line 84
            return
        end local 2 // java.lang.String name
        end local 1 // int byteValue
        end local 0 // io.netty.handler.codec.dns.DnsOpCode this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    4     0       this  Lio/netty/handler/codec/dns/DnsOpCode;
            0    4     1  byteValue  I
            0    4     2       name  Ljava/lang/String;
    MethodParameters:
           Name  Flags
      byteValue  
      name       

  public byte byteValue();
    descriptor: ()B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.dns.DnsOpCode this
         0: .line 87
            aload 0 /* this */
            getfield io.netty.handler.codec.dns.DnsOpCode.byteValue:B
            ireturn
        end local 0 // io.netty.handler.codec.dns.DnsOpCode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/dns/DnsOpCode;

  public int hashCode();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.dns.DnsOpCode this
         0: .line 92
            aload 0 /* this */
            getfield io.netty.handler.codec.dns.DnsOpCode.byteValue:B
            ireturn
        end local 0 // io.netty.handler.codec.dns.DnsOpCode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/dns/DnsOpCode;

  public boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.dns.DnsOpCode this
        start local 1 // java.lang.Object obj
         0: .line 97
            aload 0 /* this */
            aload 1 /* obj */
            if_acmpne 2
         1: .line 98
            iconst_1
            ireturn
         2: .line 101
      StackMap locals:
      StackMap stack:
            aload 1 /* obj */
            instanceof io.netty.handler.codec.dns.DnsOpCode
            ifne 4
         3: .line 102
            iconst_0
            ireturn
         4: .line 105
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.netty.handler.codec.dns.DnsOpCode.byteValue:B
            aload 1 /* obj */
            checkcast io.netty.handler.codec.dns.DnsOpCode
            getfield io.netty.handler.codec.dns.DnsOpCode.byteValue:B
            if_icmpne 5
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         5: iconst_0
            ireturn
        end local 1 // java.lang.Object obj
        end local 0 // io.netty.handler.codec.dns.DnsOpCode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lio/netty/handler/codec/dns/DnsOpCode;
            0    6     1   obj  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      obj   

  public int compareTo(io.netty.handler.codec.dns.DnsOpCode);
    descriptor: (Lio/netty/handler/codec/dns/DnsOpCode;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.dns.DnsOpCode this
        start local 1 // io.netty.handler.codec.dns.DnsOpCode o
         0: .line 110
            aload 0 /* this */
            getfield io.netty.handler.codec.dns.DnsOpCode.byteValue:B
            aload 1 /* o */
            getfield io.netty.handler.codec.dns.DnsOpCode.byteValue:B
            isub
            ireturn
        end local 1 // io.netty.handler.codec.dns.DnsOpCode o
        end local 0 // io.netty.handler.codec.dns.DnsOpCode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/dns/DnsOpCode;
            0    1     1     o  Lio/netty/handler/codec/dns/DnsOpCode;
    MethodParameters:
      Name  Flags
      o     

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=1
        start local 0 // io.netty.handler.codec.dns.DnsOpCode this
         0: .line 115
            aload 0 /* this */
            getfield io.netty.handler.codec.dns.DnsOpCode.text:Ljava/lang/String;
            astore 1 /* text */
        start local 1 // java.lang.String text
         1: .line 116
            aload 1 /* text */
            ifnonnull 3
         2: .line 117
            aload 0 /* this */
            new java.lang.StringBuilder
            dup
            aload 0 /* this */
            getfield io.netty.handler.codec.dns.DnsOpCode.name:Ljava/lang/String;
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            bipush 40
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            aload 0 /* this */
            getfield io.netty.handler.codec.dns.DnsOpCode.byteValue:B
            sipush 255
            iand
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            bipush 41
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            dup
            astore 1 /* text */
            putfield io.netty.handler.codec.dns.DnsOpCode.text:Ljava/lang/String;
         3: .line 119
      StackMap locals: java.lang.String
      StackMap stack:
            aload 1 /* text */
            areturn
        end local 1 // java.lang.String text
        end local 0 // io.netty.handler.codec.dns.DnsOpCode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lio/netty/handler/codec/dns/DnsOpCode;
            1    4     1  text  Ljava/lang/String;

  public int compareTo(java.lang.Object);
    descriptor: (Ljava/lang/Object;)I
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast io.netty.handler.codec.dns.DnsOpCode
            invokevirtual io.netty.handler.codec.dns.DnsOpCode.compareTo:(Lio/netty/handler/codec/dns/DnsOpCode;)I
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/lang/Comparable<Lio/netty/handler/codec/dns/DnsOpCode;>;
SourceFile: "DnsOpCode.java"