https://jsoup.org/: jsoup is a Java library for working with real-world HTML. It provides a very convenient API for extracting and manipulating data, using the best of DOM, CSS, and jquery-like methods. jsoup implements the WHATWG HTML5 specification, and parses HTML to the same DOM as modern browsers do. (Jonathan Hedley)
  • Jonathan Hedley 
public class org.jsoup.select.Evaluator$IsNthOfType extends org.jsoup.select.Evaluator$CssNthEvaluator
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.jsoup.select.Evaluator$IsNthOfType
  super_class: org.jsoup.select.Evaluator$CssNthEvaluator
{
  public void <init>(int, int);
    descriptor: (II)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.jsoup.select.Evaluator$IsNthOfType this
        start local 1 // int a
        start local 2 // int b
         0: .line 516
            aload 0 /* this */
            iload 1 /* a */
            iload 2 /* b */
            invokespecial org.jsoup.select.Evaluator$CssNthEvaluator.<init>:(II)V
         1: .line 517
            return
        end local 2 // int b
        end local 1 // int a
        end local 0 // org.jsoup.select.Evaluator$IsNthOfType this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/jsoup/select/Evaluator$IsNthOfType;
            0    2     1     a  I
            0    2     2     b  I
    MethodParameters:
      Name  Flags
      a     
      b     

  protected int calculatePosition(org.jsoup.nodes.Element, org.jsoup.nodes.Element);
    descriptor: (Lorg/jsoup/nodes/Element;Lorg/jsoup/nodes/Element;)I
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=7, args_size=3
        start local 0 // org.jsoup.select.Evaluator$IsNthOfType this
        start local 1 // org.jsoup.nodes.Element root
        start local 2 // org.jsoup.nodes.Element element
         0: .line 520
            iconst_0
            istore 3 /* pos */
        start local 3 // int pos
         1: .line 521
            aload 2 /* element */
            invokevirtual org.jsoup.nodes.Element.parent:()Lorg/jsoup/nodes/Element;
            invokevirtual org.jsoup.nodes.Element.children:()Lorg/jsoup/select/Elements;
            astore 4 /* family */
        start local 4 // org.jsoup.select.Elements family
         2: .line 522
            aload 4 /* family */
            invokevirtual org.jsoup.select.Elements.iterator:()Ljava/util/Iterator;
            astore 6
            goto 6
      StackMap locals: org.jsoup.select.Evaluator$IsNthOfType org.jsoup.nodes.Element org.jsoup.nodes.Element int org.jsoup.select.Elements top java.util.Iterator
      StackMap stack:
         3: aload 6
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast org.jsoup.nodes.Element
            astore 5 /* el */
        start local 5 // org.jsoup.nodes.Element el
         4: .line 523
            aload 5 /* el */
            invokevirtual org.jsoup.nodes.Element.tag:()Lorg/jsoup/parser/Tag;
            aload 2 /* element */
            invokevirtual org.jsoup.nodes.Element.tag:()Lorg/jsoup/parser/Tag;
            invokevirtual org.jsoup.parser.Tag.equals:(Ljava/lang/Object;)Z
            ifeq 5
            iinc 3 /* pos */ 1
         5: .line 524
      StackMap locals: org.jsoup.select.Evaluator$IsNthOfType org.jsoup.nodes.Element org.jsoup.nodes.Element int org.jsoup.select.Elements org.jsoup.nodes.Element java.util.Iterator
      StackMap stack:
            aload 5 /* el */
            aload 2 /* element */
            if_acmpne 6
            goto 7
        end local 5 // org.jsoup.nodes.Element el
         6: .line 522
      StackMap locals: org.jsoup.select.Evaluator$IsNthOfType org.jsoup.nodes.Element org.jsoup.nodes.Element int org.jsoup.select.Elements top java.util.Iterator
      StackMap stack:
            aload 6
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 3
         7: .line 526
      StackMap locals: org.jsoup.select.Evaluator$IsNthOfType org.jsoup.nodes.Element org.jsoup.nodes.Element int org.jsoup.select.Elements
      StackMap stack:
            iload 3 /* pos */
            ireturn
        end local 4 // org.jsoup.select.Elements family
        end local 3 // int pos
        end local 2 // org.jsoup.nodes.Element element
        end local 1 // org.jsoup.nodes.Element root
        end local 0 // org.jsoup.select.Evaluator$IsNthOfType this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    8     0     this  Lorg/jsoup/select/Evaluator$IsNthOfType;
            0    8     1     root  Lorg/jsoup/nodes/Element;
            0    8     2  element  Lorg/jsoup/nodes/Element;
            1    8     3      pos  I
            2    8     4   family  Lorg/jsoup/select/Elements;
            4    6     5       el  Lorg/jsoup/nodes/Element;
    MethodParameters:
         Name  Flags
      root     
      element  

  protected java.lang.String getPseudoClass();
    descriptor: ()Ljava/lang/String;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.jsoup.select.Evaluator$IsNthOfType this
         0: .line 531
            ldc "nth-of-type"
            areturn
        end local 0 // org.jsoup.select.Evaluator$IsNthOfType this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/jsoup/select/Evaluator$IsNthOfType;
}
SourceFile: "Evaluator.java"
NestHost: org.jsoup.select.Evaluator
InnerClasses:
  public abstract CssNthEvaluator = org.jsoup.select.Evaluator$CssNthEvaluator of org.jsoup.select.Evaluator
  public IsNthOfType = org.jsoup.select.Evaluator$IsNthOfType of org.jsoup.select.Evaluator