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 interface it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry extends java.util.Map$Entry<java.lang.Byte, java.lang.Double>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry
  super_class: java.lang.Object
{
  public abstract byte getByteKey();
    descriptor: ()B
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public java.lang.Byte getKey();
    descriptor: ()Ljava/lang/Byte;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry this
         0: .line 722
            aload 0 /* this */
            invokeinterface it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry.getByteKey:()B
            invokestatic java.lang.Byte.valueOf:(B)Ljava/lang/Byte;
            areturn
        end local 0 // it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/bytes/Byte2DoubleMap$Entry;
    RuntimeVisibleAnnotations: 
      java.lang.Deprecated()

  public abstract double getDoubleValue();
    descriptor: ()D
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract double setValue(double);
    descriptor: (D)D
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      value  final

  public java.lang.Double getValue();
    descriptor: ()Ljava/lang/Double;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry this
         0: .line 745
            aload 0 /* this */
            invokeinterface it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry.getDoubleValue:()D
            invokestatic java.lang.Double.valueOf:(D)Ljava/lang/Double;
            areturn
        end local 0 // it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lit/unimi/dsi/fastutil/bytes/Byte2DoubleMap$Entry;
    RuntimeVisibleAnnotations: 
      java.lang.Deprecated()

  public java.lang.Double setValue(java.lang.Double);
    descriptor: (Ljava/lang/Double;)Ljava/lang/Double;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry this
        start local 1 // java.lang.Double value
         0: .line 755
            aload 0 /* this */
            aload 1 /* value */
            invokevirtual java.lang.Double.doubleValue:()D
            invokeinterface it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry.setValue:(D)D
            invokestatic java.lang.Double.valueOf:(D)Ljava/lang/Double;
            areturn
        end local 1 // java.lang.Double value
        end local 0 // it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lit/unimi/dsi/fastutil/bytes/Byte2DoubleMap$Entry;
            0    1     1  value  Ljava/lang/Double;
    RuntimeVisibleAnnotations: 
      java.lang.Deprecated()
    MethodParameters:
       Name  Flags
      value  final

  public java.lang.Object getKey();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokeinterface it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry.getKey:()Ljava/lang/Byte;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.lang.Object setValue(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    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.Double
            invokeinterface it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry.setValue:(Ljava/lang/Double;)Ljava/lang/Double;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.lang.Object getValue();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokeinterface it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry.getValue:()Ljava/lang/Double;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/Map$Entry<Ljava/lang/Byte;Ljava/lang/Double;>;
SourceFile: "Byte2DoubleMap.java"
NestHost: it.unimi.dsi.fastutil.bytes.Byte2DoubleMap
InnerClasses:
  public abstract Entry = it.unimi.dsi.fastutil.bytes.Byte2DoubleMap$Entry of it.unimi.dsi.fastutil.bytes.Byte2DoubleMap
  public abstract Entry = java.util.Map$Entry of java.util.Map