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 
final class it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator extends it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap<K>.TreeIterator implements it.unimi.dsi.fastutil.objects.ObjectListIterator<K>
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator
  super_class: it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$TreeIterator
{
  final it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap this$0;
    descriptor: Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  public void <init>(it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap);
    descriptor: (Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator this
         0: .line 1184
            aload 0 /* this */
            aload 1
            putfield it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator.this$0:Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap;
            aload 0 /* this */
            aload 1
            invokespecial it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$TreeIterator.<init>:(Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap;)V
         1: .line 1185
            return
        end local 0 // it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap$KeyIterator;
    MethodParameters:
        Name  Flags
      this$0  final

  public void <init>();
    descriptor: (Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap;Ljava/lang/Object;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator this
        start local 2 // java.lang.Object k
         0: .line 1186
            aload 0 /* this */
            aload 1
            putfield it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator.this$0:Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap;
         1: .line 1187
            aload 0 /* this */
            aload 1
            aload 2 /* k */
            invokespecial it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$TreeIterator.<init>:(Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap;Ljava/lang/Object;)V
         2: .line 1188
            return
        end local 2 // java.lang.Object k
        end local 0 // it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap$KeyIterator;
            0    3     2     k  TK;
    Signature: (TK;)V
    MethodParameters:
        Name  Flags
      this$0  final
      k       final

  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.Object2ByteRBTreeMap$KeyIterator this
         0: .line 1191
            aload 0 /* this */
            invokevirtual it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator.nextEntry:()Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap$Entry;
            getfield it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$Entry.key:Ljava/lang/Object;
            areturn
        end local 0 // it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap$KeyIterator;
    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.Object2ByteRBTreeMap$KeyIterator this
         0: .line 1195
            aload 0 /* this */
            invokevirtual it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator.previousEntry:()Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap$Entry;
            getfield it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$Entry.key:Ljava/lang/Object;
            areturn
        end local 0 // it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap$KeyIterator;
    Signature: ()TK;
}
Signature: Lit/unimi/dsi/fastutil/objects/Object2ByteRBTreeMap<TK;>.TreeIterator;Lit/unimi/dsi/fastutil/objects/ObjectListIterator<TK;>;
SourceFile: "Object2ByteRBTreeMap.java"
NestHost: it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap
InnerClasses:
  private final Entry = it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$Entry of it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap
  private final KeyIterator = it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$KeyIterator of it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap
  private TreeIterator = it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap$TreeIterator of it.unimi.dsi.fastutil.objects.Object2ByteRBTreeMap