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.socksx.v4.DefaultSocks4CommandRequest extends io.netty.handler.codec.socksx.v4.AbstractSocks4Message implements io.netty.handler.codec.socksx.v4.Socks4CommandRequest
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest
  super_class: io.netty.handler.codec.socksx.v4.AbstractSocks4Message
{
  private final io.netty.handler.codec.socksx.v4.Socks4CommandType type;
    descriptor: Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

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

  private final int dstPort;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

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

  public void <init>(io.netty.handler.codec.socksx.v4.Socks4CommandType, java.lang.String, int);
    descriptor: (Lio/netty/handler/codec/socksx/v4/Socks4CommandType;Ljava/lang/String;I)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=4, args_size=4
        start local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
        start local 1 // io.netty.handler.codec.socksx.v4.Socks4CommandType type
        start local 2 // java.lang.String dstAddr
        start local 3 // int dstPort
         0: .line 41
            aload 0 /* this */
            aload 1 /* type */
            aload 2 /* dstAddr */
            iload 3 /* dstPort */
            ldc ""
            invokespecial io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.<init>:(Lio/netty/handler/codec/socksx/v4/Socks4CommandType;Ljava/lang/String;ILjava/lang/String;)V
         1: .line 42
            return
        end local 3 // int dstPort
        end local 2 // java.lang.String dstAddr
        end local 1 // io.netty.handler.codec.socksx.v4.Socks4CommandType type
        end local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    2     0     this  Lio/netty/handler/codec/socksx/v4/DefaultSocks4CommandRequest;
            0    2     1     type  Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
            0    2     2  dstAddr  Ljava/lang/String;
            0    2     3  dstPort  I
    MethodParameters:
         Name  Flags
      type     
      dstAddr  
      dstPort  

  public void <init>(io.netty.handler.codec.socksx.v4.Socks4CommandType, java.lang.String, int, java.lang.String);
    descriptor: (Lio/netty/handler/codec/socksx/v4/Socks4CommandType;Ljava/lang/String;ILjava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=5, args_size=5
        start local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
        start local 1 // io.netty.handler.codec.socksx.v4.Socks4CommandType type
        start local 2 // java.lang.String dstAddr
        start local 3 // int dstPort
        start local 4 // java.lang.String userId
         0: .line 52
            aload 0 /* this */
            invokespecial io.netty.handler.codec.socksx.v4.AbstractSocks4Message.<init>:()V
         1: .line 53
            aload 1 /* type */
            ifnonnull 3
         2: .line 54
            new java.lang.NullPointerException
            dup
            ldc "type"
            invokespecial java.lang.NullPointerException.<init>:(Ljava/lang/String;)V
            athrow
         3: .line 56
      StackMap locals: io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest io.netty.handler.codec.socksx.v4.Socks4CommandType java.lang.String int java.lang.String
      StackMap stack:
            aload 2 /* dstAddr */
            ifnonnull 5
         4: .line 57
            new java.lang.NullPointerException
            dup
            ldc "dstAddr"
            invokespecial java.lang.NullPointerException.<init>:(Ljava/lang/String;)V
            athrow
         5: .line 59
      StackMap locals:
      StackMap stack:
            iload 3 /* dstPort */
            ifle 6
            iload 3 /* dstPort */
            ldc 65536
            if_icmplt 7
         6: .line 60
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "dstPort: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            iload 3 /* dstPort */
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            ldc " (expected: 1~65535)"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         7: .line 62
      StackMap locals:
      StackMap stack:
            aload 4 /* userId */
            ifnonnull 9
         8: .line 63
            new java.lang.NullPointerException
            dup
            ldc "userId"
            invokespecial java.lang.NullPointerException.<init>:(Ljava/lang/String;)V
            athrow
         9: .line 66
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 4 /* userId */
            putfield io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.userId:Ljava/lang/String;
        10: .line 67
            aload 0 /* this */
            aload 1 /* type */
            putfield io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.type:Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
        11: .line 68
            aload 0 /* this */
            aload 2 /* dstAddr */
            invokestatic java.net.IDN.toASCII:(Ljava/lang/String;)Ljava/lang/String;
            putfield io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.dstAddr:Ljava/lang/String;
        12: .line 69
            aload 0 /* this */
            iload 3 /* dstPort */
            putfield io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.dstPort:I
        13: .line 70
            return
        end local 4 // java.lang.String userId
        end local 3 // int dstPort
        end local 2 // java.lang.String dstAddr
        end local 1 // io.netty.handler.codec.socksx.v4.Socks4CommandType type
        end local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0   14     0     this  Lio/netty/handler/codec/socksx/v4/DefaultSocks4CommandRequest;
            0   14     1     type  Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
            0   14     2  dstAddr  Ljava/lang/String;
            0   14     3  dstPort  I
            0   14     4   userId  Ljava/lang/String;
    MethodParameters:
         Name  Flags
      type     
      dstAddr  
      dstPort  
      userId   

  public io.netty.handler.codec.socksx.v4.Socks4CommandType type();
    descriptor: ()Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
         0: .line 74
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.type:Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
            areturn
        end local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/socksx/v4/DefaultSocks4CommandRequest;

  public java.lang.String dstAddr();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
         0: .line 79
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.dstAddr:Ljava/lang/String;
            areturn
        end local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/socksx/v4/DefaultSocks4CommandRequest;

  public int dstPort();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
         0: .line 84
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.dstPort:I
            ireturn
        end local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/socksx/v4/DefaultSocks4CommandRequest;

  public java.lang.String userId();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
         0: .line 89
            aload 0 /* this */
            getfield io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.userId:Ljava/lang/String;
            areturn
        end local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/socksx/v4/DefaultSocks4CommandRequest;

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
         0: .line 94
            new java.lang.StringBuilder
            dup
            sipush 128
            invokespecial java.lang.StringBuilder.<init>:(I)V
            astore 1 /* buf */
        start local 1 // java.lang.StringBuilder buf
         1: .line 95
            aload 1 /* buf */
            aload 0 /* this */
            invokestatic io.netty.util.internal.StringUtil.simpleClassName:(Ljava/lang/Object;)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         2: .line 97
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.decoderResult:()Lio/netty/handler/codec/DecoderResult;
            astore 2 /* decoderResult */
        start local 2 // io.netty.handler.codec.DecoderResult decoderResult
         3: .line 98
            aload 2 /* decoderResult */
            invokevirtual io.netty.handler.codec.DecoderResult.isSuccess:()Z
            ifne 8
         4: .line 99
            aload 1 /* buf */
            ldc "(decoderResult: "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         5: .line 100
            aload 1 /* buf */
            aload 2 /* decoderResult */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            pop
         6: .line 101
            aload 1 /* buf */
            ldc ", type: "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         7: .line 102
            goto 9
         8: .line 103
      StackMap locals: java.lang.StringBuilder io.netty.handler.codec.DecoderResult
      StackMap stack:
            aload 1 /* buf */
            ldc "(type: "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         9: .line 105
      StackMap locals:
      StackMap stack:
            aload 1 /* buf */
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.type:()Lio/netty/handler/codec/socksx/v4/Socks4CommandType;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            pop
        10: .line 106
            aload 1 /* buf */
            ldc ", dstAddr: "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
        11: .line 107
            aload 1 /* buf */
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.dstAddr:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
        12: .line 108
            aload 1 /* buf */
            ldc ", dstPort: "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
        13: .line 109
            aload 1 /* buf */
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.dstPort:()I
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            pop
        14: .line 110
            aload 1 /* buf */
            ldc ", userId: "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
        15: .line 111
            aload 1 /* buf */
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest.userId:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
        16: .line 112
            aload 1 /* buf */
            bipush 41
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            pop
        17: .line 114
            aload 1 /* buf */
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 2 // io.netty.handler.codec.DecoderResult decoderResult
        end local 1 // java.lang.StringBuilder buf
        end local 0 // io.netty.handler.codec.socksx.v4.DefaultSocks4CommandRequest this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   18     0           this  Lio/netty/handler/codec/socksx/v4/DefaultSocks4CommandRequest;
            1   18     1            buf  Ljava/lang/StringBuilder;
            3   18     2  decoderResult  Lio/netty/handler/codec/DecoderResult;
}
SourceFile: "DefaultSocks4CommandRequest.java"