http://fastutil.di.unimi.it/: fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists and priority queues with a small memory footprint and fast access and insertion; provides also big (64-bit) arrays, sets and lists, and fast, practical I/O classes for binary and text files.
  • Sebastiano Vigna 
public class it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator<K> implements it.unimi.dsi.fastutil.objects.ObjectBidirectionalIterator<K>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator
  super_class: java.lang.Object
{
  protected final it.unimi.dsi.fastutil.objects.ObjectBidirectionalIterator<it.unimi.dsi.fastutil.objects.Reference2LongMap$Entry<K>> i;
    descriptor: Lit/unimi/dsi/fastutil/objects/ObjectBidirectionalIterator;
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Signature: Lit/unimi/dsi/fastutil/objects/ObjectBidirectionalIterator<Lit/unimi/dsi/fastutil/objects/Reference2LongMap$Entry<TK;>;>;

  public void <init>(it.unimi.dsi.fastutil.objects.ObjectBidirectionalIterator<it.unimi.dsi.fastutil.objects.Reference2LongMap$Entry<K>>);
    descriptor: (Lit/unimi/dsi/fastutil/objects/ObjectBidirectionalIterator;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator this
        start local 1 // it.unimi.dsi.fastutil.objects.ObjectBidirectionalIterator i
         0: .line 106
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 107
            aload 0 /* this */
            aload 1 /* i */
            putfield it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator.i:Lit/unimi/dsi/fastutil/objects/ObjectBidirectionalIterator;
         2: .line 108
            return
        end local 1 // it.unimi.dsi.fastutil.objects.ObjectBidirectionalIterator i
        end local 0 // it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lit/unimi/dsi/fastutil/objects/AbstractReference2LongSortedMap$KeySetIterator<TK;>;
            0    3     1     i  Lit/unimi/dsi/fastutil/objects/ObjectBidirectionalIterator<Lit/unimi/dsi/fastutil/objects/Reference2LongMap$Entry<TK;>;>;
    Signature: (Lit/unimi/dsi/fastutil/objects/ObjectBidirectionalIterator<Lit/unimi/dsi/fastutil/objects/Reference2LongMap$Entry<TK;>;>;)V
    MethodParameters:
      Name  Flags
      i     

  public K next();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator this
         0: .line 111
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator.i:Lit/unimi/dsi/fastutil/objects/ObjectBidirectionalIterator;
            invokeinterface it.unimi.dsi.fastutil.objects.ObjectBidirectionalIterator.next:()Ljava/lang/Object;
            checkcast it.unimi.dsi.fastutil.objects.Reference2LongMap$Entry
            invokeinterface it.unimi.dsi.fastutil.objects.Reference2LongMap$Entry.getKey:()Ljava/lang/Object;
            areturn
        end local 0 // it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/AbstractReference2LongSortedMap$KeySetIterator<TK;>;
    Signature: ()TK;

  public K previous();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator this
         0: .line 115
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator.i:Lit/unimi/dsi/fastutil/objects/ObjectBidirectionalIterator;
            invokeinterface it.unimi.dsi.fastutil.objects.ObjectBidirectionalIterator.previous:()Ljava/lang/Object;
            checkcast it.unimi.dsi.fastutil.objects.Reference2LongMap$Entry
            invokeinterface it.unimi.dsi.fastutil.objects.Reference2LongMap$Entry.getKey:()Ljava/lang/Object;
            areturn
        end local 0 // it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/AbstractReference2LongSortedMap$KeySetIterator<TK;>;
    Signature: ()TK;

  public boolean hasNext();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator this
         0: .line 119
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator.i:Lit/unimi/dsi/fastutil/objects/ObjectBidirectionalIterator;
            invokeinterface it.unimi.dsi.fastutil.objects.ObjectBidirectionalIterator.hasNext:()Z
            ireturn
        end local 0 // it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/AbstractReference2LongSortedMap$KeySetIterator<TK;>;

  public boolean hasPrevious();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator this
         0: .line 123
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator.i:Lit/unimi/dsi/fastutil/objects/ObjectBidirectionalIterator;
            invokeinterface it.unimi.dsi.fastutil.objects.ObjectBidirectionalIterator.hasPrevious:()Z
            ireturn
        end local 0 // it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/AbstractReference2LongSortedMap$KeySetIterator<TK;>;
}
Signature: <K:Ljava/lang/Object;>Ljava/lang/Object;Lit/unimi/dsi/fastutil/objects/ObjectBidirectionalIterator<TK;>;
SourceFile: "AbstractReference2LongSortedMap.java"
NestHost: it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap
InnerClasses:
  protected KeySetIterator = it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap$KeySetIterator of it.unimi.dsi.fastutil.objects.AbstractReference2LongSortedMap
  public abstract Entry = it.unimi.dsi.fastutil.objects.Reference2LongMap$Entry of it.unimi.dsi.fastutil.objects.Reference2LongMap