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 
class it.unimi.dsi.fastutil.ints.Int2IntMaps$1 implements it.unimi.dsi.fastutil.objects.ObjectIterable<it.unimi.dsi.fastutil.ints.Int2IntMap$Entry>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: it.unimi.dsi.fastutil.ints.Int2IntMaps$1
  super_class: java.lang.Object
{
  private final it.unimi.dsi.fastutil.objects.ObjectSet val$entries;
    descriptor: Lit/unimi/dsi/fastutil/objects/ObjectSet;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(it.unimi.dsi.fastutil.objects.ObjectSet);
    descriptor: (Lit/unimi/dsi/fastutil/objects/ObjectSet;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // it.unimi.dsi.fastutil.ints.Int2IntMaps$1 this
         0: .line 91
            aload 0 /* this */
            aload 1
            putfield it.unimi.dsi.fastutil.ints.Int2IntMaps$1.val$entries:Lit/unimi/dsi/fastutil/objects/ObjectSet;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // it.unimi.dsi.fastutil.ints.Int2IntMaps$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/ints/Int2IntMaps$1;
    MethodParameters:
             Name  Flags
      val$entries  final

  public it.unimi.dsi.fastutil.objects.ObjectIterator<it.unimi.dsi.fastutil.ints.Int2IntMap$Entry> iterator();
    descriptor: ()Lit/unimi/dsi/fastutil/objects/ObjectIterator;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.ints.Int2IntMaps$1 this
         0: .line 93
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.ints.Int2IntMaps$1.val$entries:Lit/unimi/dsi/fastutil/objects/ObjectSet;
            checkcast it.unimi.dsi.fastutil.ints.Int2IntMap$FastEntrySet
            invokeinterface it.unimi.dsi.fastutil.ints.Int2IntMap$FastEntrySet.fastIterator:()Lit/unimi/dsi/fastutil/objects/ObjectIterator;
            areturn
        end local 0 // it.unimi.dsi.fastutil.ints.Int2IntMaps$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/ints/Int2IntMaps$1;
    Signature: ()Lit/unimi/dsi/fastutil/objects/ObjectIterator<Lit/unimi/dsi/fastutil/ints/Int2IntMap$Entry;>;

  public void forEach(java.util.function.Consumer<? super it.unimi.dsi.fastutil.ints.Int2IntMap$Entry>);
    descriptor: (Ljava/util/function/Consumer;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // it.unimi.dsi.fastutil.ints.Int2IntMaps$1 this
        start local 1 // java.util.function.Consumer consumer
         0: .line 96
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.ints.Int2IntMaps$1.val$entries:Lit/unimi/dsi/fastutil/objects/ObjectSet;
            checkcast it.unimi.dsi.fastutil.ints.Int2IntMap$FastEntrySet
            aload 1 /* consumer */
            invokeinterface it.unimi.dsi.fastutil.ints.Int2IntMap$FastEntrySet.fastForEach:(Ljava/util/function/Consumer;)V
         1: .line 97
            return
        end local 1 // java.util.function.Consumer consumer
        end local 0 // it.unimi.dsi.fastutil.ints.Int2IntMaps$1 this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lit/unimi/dsi/fastutil/ints/Int2IntMaps$1;
            0    2     1  consumer  Ljava/util/function/Consumer<-Lit/unimi/dsi/fastutil/ints/Int2IntMap$Entry;>;
    Signature: (Ljava/util/function/Consumer<-Lit/unimi/dsi/fastutil/ints/Int2IntMap$Entry;>;)V
    MethodParameters:
          Name  Flags
      consumer  final

  public java.util.Iterator iterator();
    descriptor: ()Ljava/util/Iterator;
    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.ints.Int2IntMaps$1.iterator:()Lit/unimi/dsi/fastutil/objects/ObjectIterator;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Lit/unimi/dsi/fastutil/objects/ObjectIterable<Lit/unimi/dsi/fastutil/ints/Int2IntMap$Entry;>;
SourceFile: "Int2IntMaps.java"
EnclosingMethod: it.unimi.dsi.fastutil.ints.Int2IntMaps.fastIterable:(Lit/unimi/dsi/fastutil/ints/Int2IntMap;)Lit/unimi/dsi/fastutil/objects/ObjectIterable;
NestHost: it.unimi.dsi.fastutil.ints.Int2IntMaps
InnerClasses:
  public abstract Entry = it.unimi.dsi.fastutil.ints.Int2IntMap$Entry of it.unimi.dsi.fastutil.ints.Int2IntMap
  public abstract FastEntrySet = it.unimi.dsi.fastutil.ints.Int2IntMap$FastEntrySet of it.unimi.dsi.fastutil.ints.Int2IntMap
  it.unimi.dsi.fastutil.ints.Int2IntMaps$1