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.ints.IntSets$SynchronizedSet extends it.unimi.dsi.fastutil.ints.IntCollections$SynchronizedCollection implements it.unimi.dsi.fastutil.ints.IntSet, java.io.Serializable
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet
  super_class: it.unimi.dsi.fastutil.ints.IntCollections$SynchronizedCollection
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: -7046029254386353129

  protected void <init>(it.unimi.dsi.fastutil.ints.IntSet, java.lang.Object);
    descriptor: (Lit/unimi/dsi/fastutil/ints/IntSet;Ljava/lang/Object;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet this
        start local 1 // it.unimi.dsi.fastutil.ints.IntSet s
        start local 2 // java.lang.Object sync
         0: .line 158
            aload 0 /* this */
            aload 1 /* s */
            aload 2 /* sync */
            invokespecial it.unimi.dsi.fastutil.ints.IntCollections$SynchronizedCollection.<init>:(Lit/unimi/dsi/fastutil/ints/IntCollection;Ljava/lang/Object;)V
         1: .line 159
            return
        end local 2 // java.lang.Object sync
        end local 1 // it.unimi.dsi.fastutil.ints.IntSet s
        end local 0 // it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lit/unimi/dsi/fastutil/ints/IntSets$SynchronizedSet;
            0    2     1     s  Lit/unimi/dsi/fastutil/ints/IntSet;
            0    2     2  sync  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      s     final
      sync  final

  protected void <init>(it.unimi.dsi.fastutil.ints.IntSet);
    descriptor: (Lit/unimi/dsi/fastutil/ints/IntSet;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet this
        start local 1 // it.unimi.dsi.fastutil.ints.IntSet s
         0: .line 161
            aload 0 /* this */
            aload 1 /* s */
            invokespecial it.unimi.dsi.fastutil.ints.IntCollections$SynchronizedCollection.<init>:(Lit/unimi/dsi/fastutil/ints/IntCollection;)V
         1: .line 162
            return
        end local 1 // it.unimi.dsi.fastutil.ints.IntSet s
        end local 0 // it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lit/unimi/dsi/fastutil/ints/IntSets$SynchronizedSet;
            0    2     1     s  Lit/unimi/dsi/fastutil/ints/IntSet;
    MethodParameters:
      Name  Flags
      s     final

  public boolean remove(int);
    descriptor: (I)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet this
        start local 1 // int k
         0: .line 165
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet.sync:Ljava/lang/Object;
            dup
            astore 2
            monitorenter
         1: .line 166
            aload 0 /* this */
            getfield it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet.collection:Lit/unimi/dsi/fastutil/ints/IntCollection;
            iload 1 /* k */
            invokeinterface it.unimi.dsi.fastutil.ints.IntCollection.rem:(I)Z
            aload 2
            monitorexit
         2: ireturn
         3: .line 165
      StackMap locals: it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet int java.lang.Object
      StackMap stack: java.lang.Throwable
            aload 2
            monitorexit
         4: athrow
        end local 1 // int k
        end local 0 // it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lit/unimi/dsi/fastutil/ints/IntSets$SynchronizedSet;
            0    5     1     k  I
      Exception table:
        from    to  target  type
           1     2       3  any
           3     4       3  any
    MethodParameters:
      Name  Flags
      k     final

  public boolean rem(int);
    descriptor: (I)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet this
        start local 1 // int k
         0: .line 172
            aload 0 /* this */
            iload 1 /* k */
            invokespecial it.unimi.dsi.fastutil.ints.IntCollections$SynchronizedCollection.rem:(I)Z
            ireturn
        end local 1 // int k
        end local 0 // it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/ints/IntSets$SynchronizedSet;
            0    1     1     k  I
    RuntimeVisibleAnnotations: 
      java.lang.Deprecated()
    MethodParameters:
      Name  Flags
      k     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.IntSets$SynchronizedSet.iterator:()Lit/unimi/dsi/fastutil/ints/IntIterator;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public boolean add(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    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.Integer
            invokevirtual it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet.add:(Ljava/lang/Integer;)Z
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
SourceFile: "IntSets.java"
NestHost: it.unimi.dsi.fastutil.ints.IntSets
InnerClasses:
  public SynchronizedCollection = it.unimi.dsi.fastutil.ints.IntCollections$SynchronizedCollection of it.unimi.dsi.fastutil.ints.IntCollections
  public SynchronizedSet = it.unimi.dsi.fastutil.ints.IntSets$SynchronizedSet of it.unimi.dsi.fastutil.ints.IntSets