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.Reference2ObjectSortedMaps$EmptySortedMap<K, V> extends it.unimi.dsi.fastutil.objects.Reference2ObjectMaps$EmptyMap<K, V> implements it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMap<K, V>, java.io.Serializable, java.lang.Cloneable
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap
  super_class: it.unimi.dsi.fastutil.objects.Reference2ObjectMaps$EmptyMap
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: -7046029254386353129

  protected void <init>();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
         0: .line 98
            aload 0 /* this */
            invokespecial it.unimi.dsi.fastutil.objects.Reference2ObjectMaps$EmptyMap.<init>:()V
         1: .line 99
            return
        end local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap<TK;TV;>;

  public java.util.Comparator<? super K> comparator();
    descriptor: ()Ljava/util/Comparator;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
         0: .line 102
            aconst_null
            areturn
        end local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap<TK;TV;>;
    Signature: ()Ljava/util/Comparator<-TK;>;

  public it.unimi.dsi.fastutil.objects.ObjectSortedSet<it.unimi.dsi.fastutil.objects.Reference2ObjectMap$Entry<K, V>> reference2ObjectEntrySet();
    descriptor: ()Lit/unimi/dsi/fastutil/objects/ObjectSortedSet;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
         0: .line 107
            getstatic it.unimi.dsi.fastutil.objects.ObjectSortedSets.EMPTY_SET:Lit/unimi/dsi/fastutil/objects/ObjectSortedSets$EmptySet;
            areturn
        end local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap<TK;TV;>;
    Signature: ()Lit/unimi/dsi/fastutil/objects/ObjectSortedSet<Lit/unimi/dsi/fastutil/objects/Reference2ObjectMap$Entry<TK;TV;>;>;

  public it.unimi.dsi.fastutil.objects.ObjectSortedSet<java.util.Map$Entry<K, V>> entrySet();
    descriptor: ()Lit/unimi/dsi/fastutil/objects/ObjectSortedSet;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
         0: .line 113
            getstatic it.unimi.dsi.fastutil.objects.ObjectSortedSets.EMPTY_SET:Lit/unimi/dsi/fastutil/objects/ObjectSortedSets$EmptySet;
            areturn
        end local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap<TK;TV;>;
    Signature: ()Lit/unimi/dsi/fastutil/objects/ObjectSortedSet<Ljava/util/Map$Entry<TK;TV;>;>;

  public it.unimi.dsi.fastutil.objects.ReferenceSortedSet<K> keySet();
    descriptor: ()Lit/unimi/dsi/fastutil/objects/ReferenceSortedSet;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
         0: .line 118
            getstatic it.unimi.dsi.fastutil.objects.ReferenceSortedSets.EMPTY_SET:Lit/unimi/dsi/fastutil/objects/ReferenceSortedSets$EmptySet;
            areturn
        end local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap<TK;TV;>;
    Signature: ()Lit/unimi/dsi/fastutil/objects/ReferenceSortedSet<TK;>;

  public it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMap<K, V> subMap(K, K);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMap;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=3, args_size=3
        start local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
        start local 1 // java.lang.Object from
        start local 2 // java.lang.Object to
         0: .line 123
            getstatic it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps.EMPTY_MAP:Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap;
            areturn
        end local 2 // java.lang.Object to
        end local 1 // java.lang.Object from
        end local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap<TK;TV;>;
            0    1     1  from  TK;
            0    1     2    to  TK;
    Signature: (TK;TK;)Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMap<TK;TV;>;
    MethodParameters:
      Name  Flags
      from  final
      to    final

  public it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMap<K, V> headMap(K);
    descriptor: (Ljava/lang/Object;)Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMap;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
        start local 1 // java.lang.Object to
         0: .line 128
            getstatic it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps.EMPTY_MAP:Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap;
            areturn
        end local 1 // java.lang.Object to
        end local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap<TK;TV;>;
            0    1     1    to  TK;
    Signature: (TK;)Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMap<TK;TV;>;
    MethodParameters:
      Name  Flags
      to    final

  public it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMap<K, V> tailMap(K);
    descriptor: (Ljava/lang/Object;)Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMap;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
        start local 1 // java.lang.Object from
         0: .line 133
            getstatic it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps.EMPTY_MAP:Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap;
            areturn
        end local 1 // java.lang.Object from
        end local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap<TK;TV;>;
            0    1     1  from  TK;
    Signature: (TK;)Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMap<TK;TV;>;
    MethodParameters:
      Name  Flags
      from  final

  public K firstKey();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
         0: .line 137
            new java.util.NoSuchElementException
            dup
            invokespecial java.util.NoSuchElementException.<init>:()V
            athrow
        end local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap<TK;TV;>;
    Signature: ()TK;

  public K lastKey();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
         0: .line 141
            new java.util.NoSuchElementException
            dup
            invokespecial java.util.NoSuchElementException.<init>:()V
            athrow
        end local 0 // it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMaps$EmptySortedMap<TK;TV;>;
    Signature: ()TK;

  public java.util.SortedMap subMap(java.lang.Object, java.lang.Object);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)Ljava/util/SortedMap;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.Object
            aload 2
            checkcast java.lang.Object
            invokevirtual it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap.subMap:(Ljava/lang/Object;Ljava/lang/Object;)Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMap;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.util.Set keySet();
    descriptor: ()Ljava/util/Set;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap.keySet:()Lit/unimi/dsi/fastutil/objects/ReferenceSortedSet;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public it.unimi.dsi.fastutil.objects.ReferenceSet keySet();
    descriptor: ()Lit/unimi/dsi/fastutil/objects/ReferenceSet;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap.keySet:()Lit/unimi/dsi/fastutil/objects/ReferenceSortedSet;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.util.Set entrySet();
    descriptor: ()Ljava/util/Set;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap.entrySet:()Lit/unimi/dsi/fastutil/objects/ObjectSortedSet;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public it.unimi.dsi.fastutil.objects.ObjectSet entrySet();
    descriptor: ()Lit/unimi/dsi/fastutil/objects/ObjectSet;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap.entrySet:()Lit/unimi/dsi/fastutil/objects/ObjectSortedSet;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.util.SortedMap headMap(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/util/SortedMap;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.Object
            invokevirtual it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap.headMap:(Ljava/lang/Object;)Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMap;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public it.unimi.dsi.fastutil.objects.ObjectSet reference2ObjectEntrySet();
    descriptor: ()Lit/unimi/dsi/fastutil/objects/ObjectSet;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap.reference2ObjectEntrySet:()Lit/unimi/dsi/fastutil/objects/ObjectSortedSet;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.util.Collection values();
    descriptor: ()Ljava/util/Collection;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap.values:()Lit/unimi/dsi/fastutil/objects/ObjectCollection;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.util.SortedMap tailMap(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/util/SortedMap;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.Object
            invokevirtual it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap.tailMap:(Ljava/lang/Object;)Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMap;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <K:Ljava/lang/Object;V:Ljava/lang/Object;>Lit/unimi/dsi/fastutil/objects/Reference2ObjectMaps$EmptyMap<TK;TV;>;Lit/unimi/dsi/fastutil/objects/Reference2ObjectSortedMap<TK;TV;>;Ljava/io/Serializable;Ljava/lang/Cloneable;
SourceFile: "Reference2ObjectSortedMaps.java"
NestHost: it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps
InnerClasses:
  public abstract Entry = it.unimi.dsi.fastutil.objects.Reference2ObjectMap$Entry of it.unimi.dsi.fastutil.objects.Reference2ObjectMap
  public EmptyMap = it.unimi.dsi.fastutil.objects.Reference2ObjectMaps$EmptyMap of it.unimi.dsi.fastutil.objects.Reference2ObjectMaps
  public EmptySortedMap = it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps$EmptySortedMap of it.unimi.dsi.fastutil.objects.Reference2ObjectSortedMaps
  public abstract Entry = java.util.Map$Entry of java.util.Map