https://github.com/eclipse/eclipse-collections/eclipse-collections: Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.
  • Craig P. Motlin
  • Donald Raab
  • Mohammad A. Rezaei
  • Hiroshi Ito
  • Nikhil J. Nanivadekar 
public class org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator implements java.util.Iterator<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator
  super_class: java.lang.Object
{
  protected int count;
    descriptor: I
    flags: (0x0004) ACC_PROTECTED

  protected int position;
    descriptor: I
    flags: (0x0004) ACC_PROTECTED

  protected int chainPosition;
    descriptor: I
    flags: (0x0004) ACC_PROTECTED

  protected boolean lastReturned;
    descriptor: Z
    flags: (0x0004) ACC_PROTECTED

  final org.eclipse.collections.impl.set.mutable.UnifiedSet this$0;
    descriptor: Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  protected void <init>(org.eclipse.collections.impl.set.mutable.UnifiedSet);
    descriptor: (Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
         0: .line 1711
            aload 0 /* this */
            aload 1
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.this$0:Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$PositionalIterator;
    MethodParameters:
        Name  Flags
      this$0  final

  public boolean hasNext();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
         0: .line 1721
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.count:I
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.this$0:Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet.size:()I
            if_icmpge 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$PositionalIterator;

  public void remove();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
         0: .line 1727
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.lastReturned:Z
            ifne 2
         1: .line 1729
            new java.lang.IllegalStateException
            dup
            ldc "next() must be called as many times as remove()"
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 1731
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            dup
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.count:I
            iconst_1
            isub
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.count:I
         3: .line 1732
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.this$0:Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
            dup
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet.occupied:I
            iconst_1
            isub
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet.occupied:I
         4: .line 1734
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.chainPosition:I
            ifeq 7
         5: .line 1736
            aload 0 /* this */
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.removeFromChain:()V
         6: .line 1737
            return
         7: .line 1740
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
            iconst_1
            isub
            istore 1 /* pos */
        start local 1 // int pos
         8: .line 1741
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.this$0:Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet.table:[Ljava/lang/Object;
            iload 1 /* pos */
            aaload
            astore 2 /* key */
        start local 2 // java.lang.Object key
         9: .line 1742
            aload 2 /* key */
            instanceof org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket
            ifeq 12
        10: .line 1744
            aload 0 /* this */
            aload 2 /* key */
            checkcast org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket
            iload 1 /* pos */
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.removeLastFromChain:(Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$ChainedBucket;I)V
        11: .line 1745
            return
        12: .line 1747
      StackMap locals: int java.lang.Object
      StackMap stack:
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.this$0:Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet.table:[Ljava/lang/Object;
            iload 1 /* pos */
            aconst_null
            aastore
        13: .line 1748
            aload 0 /* this */
            iload 1 /* pos */
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
        14: .line 1749
            aload 0 /* this */
            iconst_0
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.lastReturned:Z
        15: .line 1750
            return
        end local 2 // java.lang.Object key
        end local 1 // int pos
        end local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   16     0  this  Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$PositionalIterator;
            8   16     1   pos  I
            9   16     2   key  Ljava/lang/Object;

  protected void removeFromChain();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=2, args_size=1
        start local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
         0: .line 1754
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.this$0:Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet.table:[Ljava/lang/Object;
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
            aaload
            checkcast org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket
            astore 1 /* chain */
        start local 1 // org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket chain
         1: .line 1755
            aload 1 /* chain */
            aload 0 /* this */
            dup
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.chainPosition:I
            iconst_1
            isub
            dup_x1
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.chainPosition:I
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket.remove:(I)V
         2: .line 1756
            aload 0 /* this */
            iconst_0
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.lastReturned:Z
         3: .line 1757
            return
        end local 1 // org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket chain
        end local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    4     0   this  Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$PositionalIterator;
            1    4     1  chain  Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$ChainedBucket;

  protected void removeLastFromChain(org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket, int);
    descriptor: (Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$ChainedBucket;I)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
        start local 1 // org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket bucket
        start local 2 // int tableIndex
         0: .line 1761
            aload 1 /* bucket */
            iconst_0
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket.removeLast:(I)Ljava/lang/Object;
            pop
         1: .line 1762
            aload 1 /* bucket */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket.zero:Ljava/lang/Object;
            ifnonnull 3
         2: .line 1764
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.this$0:Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet.table:[Ljava/lang/Object;
            iload 2 /* tableIndex */
            aconst_null
            aastore
         3: .line 1766
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            iconst_0
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.lastReturned:Z
         4: .line 1767
            return
        end local 2 // int tableIndex
        end local 1 // org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket bucket
        end local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    5     0        this  Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$PositionalIterator;
            0    5     1      bucket  Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$ChainedBucket;
            0    5     2  tableIndex  I
    MethodParameters:
            Name  Flags
      bucket      
      tableIndex  

  protected T nextFromChain();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
         0: .line 1771
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.this$0:Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet.table:[Ljava/lang/Object;
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
            aaload
            checkcast org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket
            astore 1 /* bucket */
        start local 1 // org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket bucket
         1: .line 1772
            aload 1 /* bucket */
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.chainPosition:I
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket.get:(I)Ljava/lang/Object;
            astore 2 /* cur */
        start local 2 // java.lang.Object cur
         2: .line 1773
            aload 0 /* this */
            dup
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.chainPosition:I
            iconst_1
            iadd
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.chainPosition:I
         3: .line 1774
            aload 1 /* bucket */
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.chainPosition:I
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket.get:(I)Ljava/lang/Object;
            ifnonnull 6
         4: .line 1776
            aload 0 /* this */
            iconst_0
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.chainPosition:I
         5: .line 1777
            aload 0 /* this */
            dup
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
            iconst_1
            iadd
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
         6: .line 1779
      StackMap locals: org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket java.lang.Object
      StackMap stack:
            aload 0 /* this */
            iconst_1
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.lastReturned:Z
         7: .line 1780
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.this$0:Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
            aload 2 /* cur */
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet.nonSentinel:(Ljava/lang/Object;)Ljava/lang/Object;
            areturn
        end local 2 // java.lang.Object cur
        end local 1 // org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket bucket
        end local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    8     0    this  Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$PositionalIterator;
            1    8     1  bucket  Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$ChainedBucket;
            2    8     2     cur  Ljava/lang/Object;
    Signature: ()TT;

  public T next();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
         0: .line 1786
            aload 0 /* this */
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.hasNext:()Z
            ifne 2
         1: .line 1788
            new java.util.NoSuchElementException
            dup
            ldc "next() called, but the iterator is exhausted"
            invokespecial java.util.NoSuchElementException.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 1790
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            dup
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.count:I
            iconst_1
            iadd
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.count:I
         3: .line 1791
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.this$0:Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet.table:[Ljava/lang/Object;
            astore 1 /* table */
        start local 1 // java.lang.Object[] table
         4: .line 1792
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.chainPosition:I
            ifeq 7
         5: .line 1794
            aload 0 /* this */
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.nextFromChain:()Ljava/lang/Object;
            areturn
         6: .line 1798
      StackMap locals: java.lang.Object[]
      StackMap stack:
            aload 0 /* this */
            dup
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
            iconst_1
            iadd
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
         7: .line 1796
      StackMap locals:
      StackMap stack:
            aload 1 /* table */
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
            aaload
            ifnull 6
         8: .line 1800
            aload 1 /* table */
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
            aaload
            astore 2 /* cur */
        start local 2 // java.lang.Object cur
         9: .line 1801
            aload 2 /* cur */
            instanceof org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket
            ifeq 11
        10: .line 1803
            aload 0 /* this */
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.nextFromChain:()Ljava/lang/Object;
            areturn
        11: .line 1805
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 0 /* this */
            dup
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
            iconst_1
            iadd
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.position:I
        12: .line 1806
            aload 0 /* this */
            iconst_1
            putfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.lastReturned:Z
        13: .line 1807
            aload 0 /* this */
            getfield org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator.this$0:Lorg/eclipse/collections/impl/set/mutable/UnifiedSet;
            aload 2 /* cur */
            invokevirtual org.eclipse.collections.impl.set.mutable.UnifiedSet.nonSentinel:(Ljava/lang/Object;)Ljava/lang/Object;
            areturn
        end local 2 // java.lang.Object cur
        end local 1 // java.lang.Object[] table
        end local 0 // org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0   14     0   this  Lorg/eclipse/collections/impl/set/mutable/UnifiedSet$PositionalIterator;
            4   14     1  table  [Ljava/lang/Object;
            9   14     2    cur  Ljava/lang/Object;
    Signature: ()TT;
}
Signature: Ljava/lang/Object;Ljava/util/Iterator<TT;>;
SourceFile: "UnifiedSet.java"
NestHost: org.eclipse.collections.impl.set.mutable.UnifiedSet
InnerClasses:
  private final ChainedBucket = org.eclipse.collections.impl.set.mutable.UnifiedSet$ChainedBucket of org.eclipse.collections.impl.set.mutable.UnifiedSet
  protected PositionalIterator = org.eclipse.collections.impl.set.mutable.UnifiedSet$PositionalIterator of org.eclipse.collections.impl.set.mutable.UnifiedSet