https://github.com/google/guava/guava: Guava is a suite of core and expanded libraries that include utility classes, google's collections, io classes, and much much more. 
final class com.google.common.primitives.Floats$FloatConverter extends com.google.common.base.Converter<java.lang.String, java.lang.Float> implements java.io.Serializable
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.primitives.Floats$FloatConverter
  super_class: com.google.common.base.Converter
{
  static final com.google.common.primitives.Floats$FloatConverter INSTANCE;
    descriptor: Lcom/google/common/primitives/Floats$FloatConverter;
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 277
            new com.google.common.primitives.Floats$FloatConverter
            dup
            invokespecial com.google.common.primitives.Floats$FloatConverter.<init>:()V
            putstatic com.google.common.primitives.Floats$FloatConverter.INSTANCE:Lcom/google/common/primitives/Floats$FloatConverter;
         1: .line 298
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.primitives.Floats$FloatConverter this
         0: .line 275
            aload 0 /* this */
            invokespecial com.google.common.base.Converter.<init>:()V
            return
        end local 0 // com.google.common.primitives.Floats$FloatConverter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/primitives/Floats$FloatConverter;

  protected java.lang.Float doForward(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/lang/Float;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // com.google.common.primitives.Floats$FloatConverter this
        start local 1 // java.lang.String value
         0: .line 281
            aload 1 /* value */
            invokestatic java.lang.Float.valueOf:(Ljava/lang/String;)Ljava/lang/Float;
            areturn
        end local 1 // java.lang.String value
        end local 0 // com.google.common.primitives.Floats$FloatConverter this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/google/common/primitives/Floats$FloatConverter;
            0    1     1  value  Ljava/lang/String;
    MethodParameters:
       Name  Flags
      value  

  protected java.lang.String doBackward(java.lang.Float);
    descriptor: (Ljava/lang/Float;)Ljava/lang/String;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // com.google.common.primitives.Floats$FloatConverter this
        start local 1 // java.lang.Float value
         0: .line 286
            aload 1 /* value */
            invokevirtual java.lang.Float.toString:()Ljava/lang/String;
            areturn
        end local 1 // java.lang.Float value
        end local 0 // com.google.common.primitives.Floats$FloatConverter this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/google/common/primitives/Floats$FloatConverter;
            0    1     1  value  Ljava/lang/Float;
    MethodParameters:
       Name  Flags
      value  

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.primitives.Floats$FloatConverter this
         0: .line 291
            ldc "Floats.stringConverter()"
            areturn
        end local 0 // com.google.common.primitives.Floats$FloatConverter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/primitives/Floats$FloatConverter;

  private java.lang.Object readResolve();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.primitives.Floats$FloatConverter this
         0: .line 295
            getstatic com.google.common.primitives.Floats$FloatConverter.INSTANCE:Lcom/google/common/primitives/Floats$FloatConverter;
            areturn
        end local 0 // com.google.common.primitives.Floats$FloatConverter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/primitives/Floats$FloatConverter;

  protected java.lang.Object doBackward(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x1044) ACC_PROTECTED, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.Float
            invokevirtual com.google.common.primitives.Floats$FloatConverter.doBackward:(Ljava/lang/Float;)Ljava/lang/String;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  protected java.lang.Object doForward(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x1044) ACC_PROTECTED, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.String
            invokevirtual com.google.common.primitives.Floats$FloatConverter.doForward:(Ljava/lang/String;)Ljava/lang/Float;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Lcom/google/common/base/Converter<Ljava/lang/String;Ljava/lang/Float;>;Ljava/io/Serializable;
SourceFile: "Floats.java"
NestHost: com.google.common.primitives.Floats
InnerClasses:
  private final FloatConverter = com.google.common.primitives.Floats$FloatConverter of com.google.common.primitives.Floats