https://ant.apache.org/: master POM (The Apache Software Foundation) 
public class org.apache.tools.mail.SmtpResponseReader
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.tools.mail.SmtpResponseReader
  super_class: java.lang.Object
{
  protected java.io.BufferedReader reader;
    descriptor: Ljava/io/BufferedReader;
    flags: (0x0004) ACC_PROTECTED

  public void <init>(java.io.InputStream);
    descriptor: (Ljava/io/InputStream;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=2, args_size=2
        start local 0 // org.apache.tools.mail.SmtpResponseReader this
        start local 1 // java.io.InputStream in
         0: .line 43
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 36
            aload 0 /* this */
            aconst_null
            putfield org.apache.tools.mail.SmtpResponseReader.reader:Ljava/io/BufferedReader;
         2: .line 44
            aload 0 /* this */
            new java.io.BufferedReader
            dup
            new java.io.InputStreamReader
            dup
            aload 1 /* in */
            invokespecial java.io.InputStreamReader.<init>:(Ljava/io/InputStream;)V
            invokespecial java.io.BufferedReader.<init>:(Ljava/io/Reader;)V
            putfield org.apache.tools.mail.SmtpResponseReader.reader:Ljava/io/BufferedReader;
         3: .line 45
            return
        end local 1 // java.io.InputStream in
        end local 0 // org.apache.tools.mail.SmtpResponseReader this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lorg/apache/tools/mail/SmtpResponseReader;
            0    4     1    in  Ljava/io/InputStream;
    MethodParameters:
      Name  Flags
      in    

  public java.lang.String getResponse();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=1
        start local 0 // org.apache.tools.mail.SmtpResponseReader this
         0: .line 56
            new java.lang.StringBuilder
            dup
            invokespecial java.lang.StringBuilder.<init>:()V
            astore 1 /* result */
        start local 1 // java.lang.StringBuilder result
         1: .line 57
            aload 0 /* this */
            getfield org.apache.tools.mail.SmtpResponseReader.reader:Ljava/io/BufferedReader;
            invokevirtual java.io.BufferedReader.readLine:()Ljava/lang/String;
            astore 2 /* line */
        start local 2 // java.lang.String line
         2: .line 59
            aload 2 /* line */
            ifnull 10
            aload 2 /* line */
            invokevirtual java.lang.String.length:()I
            iconst_3
            if_icmplt 10
         3: .line 60
            aload 1 /* result */
            aload 2 /* line */
            iconst_0
            iconst_3
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/CharSequence;II)Ljava/lang/StringBuilder;
            pop
         4: .line 61
            aload 1 /* result */
            ldc " "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         5: .line 65
            goto 10
         6: .line 66
      StackMap locals: java.lang.StringBuilder java.lang.String
      StackMap stack:
            aload 1 /* result */
            aload 2 /* line */
            invokestatic org.apache.tools.mail.SmtpResponseReader.appendTo:(Ljava/lang/StringBuilder;Ljava/lang/String;)V
         7: .line 67
            aload 0 /* this */
            aload 2 /* line */
            invokevirtual org.apache.tools.mail.SmtpResponseReader.hasMoreLines:(Ljava/lang/String;)Z
            ifne 9
         8: .line 68
            goto 11
         9: .line 70
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.tools.mail.SmtpResponseReader.reader:Ljava/io/BufferedReader;
            invokevirtual java.io.BufferedReader.readLine:()Ljava/lang/String;
            astore 2 /* line */
        10: .line 65
      StackMap locals:
      StackMap stack:
            aload 2 /* line */
            ifnonnull 6
        11: .line 72
      StackMap locals:
      StackMap stack:
            aload 1 /* result */
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual java.lang.String.trim:()Ljava/lang/String;
            areturn
        end local 2 // java.lang.String line
        end local 1 // java.lang.StringBuilder result
        end local 0 // org.apache.tools.mail.SmtpResponseReader this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0   12     0    this  Lorg/apache/tools/mail/SmtpResponseReader;
            1   12     1  result  Ljava/lang/StringBuilder;
            2   12     2    line  Ljava/lang/String;
    Exceptions:
      throws java.io.IOException

  public void close();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.tools.mail.SmtpResponseReader this
         0: .line 80
            aload 0 /* this */
            getfield org.apache.tools.mail.SmtpResponseReader.reader:Ljava/io/BufferedReader;
            invokevirtual java.io.BufferedReader.close:()V
         1: .line 81
            return
        end local 0 // org.apache.tools.mail.SmtpResponseReader this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/tools/mail/SmtpResponseReader;
    Exceptions:
      throws java.io.IOException

  protected boolean hasMoreLines(java.lang.String);
    descriptor: (Ljava/lang/String;)Z
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.tools.mail.SmtpResponseReader this
        start local 1 // java.lang.String line
         0: .line 90
            aload 1 /* line */
            invokevirtual java.lang.String.length:()I
            iconst_3
            if_icmple 1
            aload 1 /* line */
            iconst_3
            invokevirtual java.lang.String.charAt:(I)C
            bipush 45
            if_icmpne 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 1 // java.lang.String line
        end local 0 // org.apache.tools.mail.SmtpResponseReader this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/tools/mail/SmtpResponseReader;
            0    2     1  line  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      line  

  private static void appendTo(java.lang.StringBuilder, java.lang.String);
    descriptor: (Ljava/lang/StringBuilder;Ljava/lang/String;)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // java.lang.StringBuilder target
        start local 1 // java.lang.String line
         0: .line 99
            aload 1 /* line */
            invokevirtual java.lang.String.length:()I
            iconst_4
            if_icmple 2
         1: .line 100
            aload 0 /* target */
            aload 1 /* line */
            iconst_4
            invokevirtual java.lang.String.substring:(I)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            bipush 32
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            pop
         2: .line 103
      StackMap locals:
      StackMap stack:
            return
        end local 1 // java.lang.String line
        end local 0 // java.lang.StringBuilder target
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    3     0  target  Ljava/lang/StringBuilder;
            0    3     1    line  Ljava/lang/String;
    MethodParameters:
        Name  Flags
      target  
      line    
}
SourceFile: "SmtpResponseReader.java"