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.longs.Long2IntOpenHashMap$KeySet extends it.unimi.dsi.fastutil.longs.AbstractLongSet
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet
  super_class: it.unimi.dsi.fastutil.longs.AbstractLongSet
{
  final it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap this$0;
    descriptor: Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private void <init>(it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap);
    descriptor: (Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
         0: .line 970
            aload 0 /* this */
            aload 1
            putfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            aload 0 /* this */
            invokespecial it.unimi.dsi.fastutil.longs.AbstractLongSet.<init>:()V
            return
        end local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap$KeySet;
    MethodParameters:
        Name  Flags
      this$0  final

  public it.unimi.dsi.fastutil.longs.LongIterator iterator();
    descriptor: ()Lit/unimi/dsi/fastutil/longs/LongIterator;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
         0: .line 973
            new it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeyIterator
            dup
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            invokespecial it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeyIterator.<init>:(Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;)V
            areturn
        end local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap$KeySet;

  public void forEach(java.util.function.LongConsumer);
    descriptor: (Ljava/util/function/LongConsumer;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=5, args_size=2
        start local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
        start local 1 // java.util.function.LongConsumer consumer
         0: .line 978
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap.containsNullKey:Z
            ifeq 2
         1: .line 979
            aload 1 /* consumer */
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap.key:[J
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap.n:I
            laload
            invokeinterface java.util.function.LongConsumer.accept:(J)V
         2: .line 980
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap.n:I
            istore 2 /* pos */
        start local 2 // int pos
         3: goto 7
         4: .line 981
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap.key:[J
            iload 2 /* pos */
            laload
            lstore 3 /* k */
        start local 3 // long k
         5: .line 982
            lload 3 /* k */
            lconst_0
            lcmp
            ifeq 7
         6: .line 983
            aload 1 /* consumer */
            lload 3 /* k */
            invokeinterface java.util.function.LongConsumer.accept:(J)V
        end local 3 // long k
         7: .line 980
      StackMap locals:
      StackMap stack:
            iload 2 /* pos */
            iinc 2 /* pos */ -1
            ifne 4
        end local 2 // int pos
         8: .line 985
            return
        end local 1 // java.util.function.LongConsumer consumer
        end local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    9     0      this  Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap$KeySet;
            0    9     1  consumer  Ljava/util/function/LongConsumer;
            3    8     2       pos  I
            5    7     3         k  J
    MethodParameters:
          Name  Flags
      consumer  final

  public int size();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
         0: .line 988
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap.size:I
            ireturn
        end local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap$KeySet;

  public boolean contains(long);
    descriptor: (J)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
        start local 1 // long k
         0: .line 992
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            lload 1 /* k */
            invokevirtual it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap.containsKey:(J)Z
            ireturn
        end local 1 // long k
        end local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap$KeySet;
            0    1     1     k  J
    MethodParameters:
      Name  Flags
      k     

  public boolean remove(long);
    descriptor: (J)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=4, args_size=2
        start local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
        start local 1 // long k
         0: .line 996
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap.size:I
            istore 3 /* oldSize */
        start local 3 // int oldSize
         1: .line 997
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            lload 1 /* k */
            invokevirtual it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap.remove:(J)I
            pop
         2: .line 998
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap.size:I
            iload 3 /* oldSize */
            if_icmpeq 3
            iconst_1
            ireturn
      StackMap locals: int
      StackMap stack:
         3: iconst_0
            ireturn
        end local 3 // int oldSize
        end local 1 // long k
        end local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    4     0     this  Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap$KeySet;
            0    4     1        k  J
            1    4     3  oldSize  I
    MethodParameters:
      Name  Flags
      k     

  public void clear();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
         0: .line 1002
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet.this$0:Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap;
            invokevirtual it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap.clear:()V
         1: .line 1003
            return
        end local 0 // it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lit/unimi/dsi/fastutil/longs/Long2IntOpenHashMap$KeySet;

  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.longs.Long2IntOpenHashMap$KeySet.iterator:()Lit/unimi/dsi/fastutil/longs/LongIterator;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
SourceFile: "Long2IntOpenHashMap.java"
NestHost: it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap
InnerClasses:
  private final KeyIterator = it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeyIterator of it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap
  private final KeySet = it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap$KeySet of it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap