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.ObjectIterators$UnmodifiableIterator<K> implements it.unimi.dsi.fastutil.objects.ObjectIterator<K>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: it.unimi.dsi.fastutil.objects.ObjectIterators$UnmodifiableIterator
  super_class: java.lang.Object
{
  protected final it.unimi.dsi.fastutil.objects.ObjectIterator<K> i;
    descriptor: Lit/unimi/dsi/fastutil/objects/ObjectIterator;
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Signature: Lit/unimi/dsi/fastutil/objects/ObjectIterator<TK;>;

  public void <init>(it.unimi.dsi.fastutil.objects.ObjectIterator<K>);
    descriptor: (Lit/unimi/dsi/fastutil/objects/ObjectIterator;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // it.unimi.dsi.fastutil.objects.ObjectIterators$UnmodifiableIterator this
        start local 1 // it.unimi.dsi.fastutil.objects.ObjectIterator i
         0: .line 792
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 793
            aload 0 /* this */
            aload 1 /* i */
            putfield it.unimi.dsi.fastutil.objects.ObjectIterators$UnmodifiableIterator.i:Lit/unimi/dsi/fastutil/objects/ObjectIterator;
         2: .line 794
            return
        end local 1 // it.unimi.dsi.fastutil.objects.ObjectIterator i
        end local 0 // it.unimi.dsi.fastutil.objects.ObjectIterators$UnmodifiableIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lit/unimi/dsi/fastutil/objects/ObjectIterators$UnmodifiableIterator<TK;>;
            0    3     1     i  Lit/unimi/dsi/fastutil/objects/ObjectIterator<TK;>;
    Signature: (Lit/unimi/dsi/fastutil/objects/ObjectIterator<TK;>;)V
    MethodParameters:
      Name  Flags
      i     final

  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.ObjectIterators$UnmodifiableIterator this
         0: .line 797
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.objects.ObjectIterators$UnmodifiableIterator.i:Lit/unimi/dsi/fastutil/objects/ObjectIterator;
            invokeinterface it.unimi.dsi.fastutil.objects.ObjectIterator.hasNext:()Z
            ireturn
        end local 0 // it.unimi.dsi.fastutil.objects.ObjectIterators$UnmodifiableIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/ObjectIterators$UnmodifiableIterator<TK;>;

  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.ObjectIterators$UnmodifiableIterator this
         0: .line 801
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.objects.ObjectIterators$UnmodifiableIterator.i:Lit/unimi/dsi/fastutil/objects/ObjectIterator;
            invokeinterface it.unimi.dsi.fastutil.objects.ObjectIterator.next:()Ljava/lang/Object;
            areturn
        end local 0 // it.unimi.dsi.fastutil.objects.ObjectIterators$UnmodifiableIterator this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/objects/ObjectIterators$UnmodifiableIterator<TK;>;
    Signature: ()TK;
}
Signature: <K:Ljava/lang/Object;>Ljava/lang/Object;Lit/unimi/dsi/fastutil/objects/ObjectIterator<TK;>;
SourceFile: "ObjectIterators.java"
NestHost: it.unimi.dsi.fastutil.objects.ObjectIterators
InnerClasses:
  public UnmodifiableIterator = it.unimi.dsi.fastutil.objects.ObjectIterators$UnmodifiableIterator of it.unimi.dsi.fastutil.objects.ObjectIterators