https://lucene.apache.org/lucene-parent/lucene-core: Apache Lucene Java Core (The Apache Software Foundation) 
public final class org.apache.lucene.document.DateTools$Resolution extends java.lang.Enum<org.apache.lucene.document.DateTools$Resolution>
  minor version: 0
  major version: 59
  flags: flags: (0x4031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER, ACC_ANNOTATION
  this_class: org.apache.lucene.document.DateTools$Resolution
  super_class: java.lang.Enum
{
  public static final org.apache.lucene.document.DateTools$Resolution YEAR;
    descriptor: Lorg/apache/lucene/document/DateTools$Resolution;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  public static final org.apache.lucene.document.DateTools$Resolution MONTH;
    descriptor: Lorg/apache/lucene/document/DateTools$Resolution;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  public static final org.apache.lucene.document.DateTools$Resolution DAY;
    descriptor: Lorg/apache/lucene/document/DateTools$Resolution;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  public static final org.apache.lucene.document.DateTools$Resolution HOUR;
    descriptor: Lorg/apache/lucene/document/DateTools$Resolution;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  public static final org.apache.lucene.document.DateTools$Resolution MINUTE;
    descriptor: Lorg/apache/lucene/document/DateTools$Resolution;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  public static final org.apache.lucene.document.DateTools$Resolution SECOND;
    descriptor: Lorg/apache/lucene/document/DateTools$Resolution;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  public static final org.apache.lucene.document.DateTools$Resolution MILLISECOND;
    descriptor: Lorg/apache/lucene/document/DateTools$Resolution;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  final int formatLen;
    descriptor: I
    flags: (0x0010) ACC_FINAL

  final java.text.SimpleDateFormat format;
    descriptor: Ljava/text/SimpleDateFormat;
    flags: (0x0010) ACC_FINAL

  private static final org.apache.lucene.document.DateTools$Resolution[] ENUM$VALUES;
    descriptor: [Lorg/apache/lucene/document/DateTools$Resolution;
    flags: (0x101a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=5, locals=0, args_size=0
         0: .line 187
            new org.apache.lucene.document.DateTools$Resolution
            dup
            ldc "YEAR"
            iconst_0
         1: .line 188
            iconst_4
            invokespecial org.apache.lucene.document.DateTools$Resolution.<init>:(Ljava/lang/String;II)V
            putstatic org.apache.lucene.document.DateTools$Resolution.YEAR:Lorg/apache/lucene/document/DateTools$Resolution;
         2: .line 189
            new org.apache.lucene.document.DateTools$Resolution
            dup
            ldc "MONTH"
            iconst_1
         3: .line 190
            bipush 6
            invokespecial org.apache.lucene.document.DateTools$Resolution.<init>:(Ljava/lang/String;II)V
            putstatic org.apache.lucene.document.DateTools$Resolution.MONTH:Lorg/apache/lucene/document/DateTools$Resolution;
         4: .line 191
            new org.apache.lucene.document.DateTools$Resolution
            dup
            ldc "DAY"
            iconst_2
         5: .line 192
            bipush 8
            invokespecial org.apache.lucene.document.DateTools$Resolution.<init>:(Ljava/lang/String;II)V
            putstatic org.apache.lucene.document.DateTools$Resolution.DAY:Lorg/apache/lucene/document/DateTools$Resolution;
         6: .line 193
            new org.apache.lucene.document.DateTools$Resolution
            dup
            ldc "HOUR"
            iconst_3
         7: .line 194
            bipush 10
            invokespecial org.apache.lucene.document.DateTools$Resolution.<init>:(Ljava/lang/String;II)V
            putstatic org.apache.lucene.document.DateTools$Resolution.HOUR:Lorg/apache/lucene/document/DateTools$Resolution;
         8: .line 195
            new org.apache.lucene.document.DateTools$Resolution
            dup
            ldc "MINUTE"
            iconst_4
         9: .line 196
            bipush 12
            invokespecial org.apache.lucene.document.DateTools$Resolution.<init>:(Ljava/lang/String;II)V
            putstatic org.apache.lucene.document.DateTools$Resolution.MINUTE:Lorg/apache/lucene/document/DateTools$Resolution;
        10: .line 197
            new org.apache.lucene.document.DateTools$Resolution
            dup
            ldc "SECOND"
            iconst_5
        11: .line 198
            bipush 14
            invokespecial org.apache.lucene.document.DateTools$Resolution.<init>:(Ljava/lang/String;II)V
            putstatic org.apache.lucene.document.DateTools$Resolution.SECOND:Lorg/apache/lucene/document/DateTools$Resolution;
        12: .line 199
            new org.apache.lucene.document.DateTools$Resolution
            dup
            ldc "MILLISECOND"
            bipush 6
        13: .line 200
            bipush 17
            invokespecial org.apache.lucene.document.DateTools$Resolution.<init>:(Ljava/lang/String;II)V
            putstatic org.apache.lucene.document.DateTools$Resolution.MILLISECOND:Lorg/apache/lucene/document/DateTools$Resolution;
        14: .line 185
            bipush 7
            anewarray org.apache.lucene.document.DateTools$Resolution
            dup
            iconst_0
            getstatic org.apache.lucene.document.DateTools$Resolution.YEAR:Lorg/apache/lucene/document/DateTools$Resolution;
            aastore
            dup
            iconst_1
            getstatic org.apache.lucene.document.DateTools$Resolution.MONTH:Lorg/apache/lucene/document/DateTools$Resolution;
            aastore
            dup
            iconst_2
            getstatic org.apache.lucene.document.DateTools$Resolution.DAY:Lorg/apache/lucene/document/DateTools$Resolution;
            aastore
            dup
            iconst_3
            getstatic org.apache.lucene.document.DateTools$Resolution.HOUR:Lorg/apache/lucene/document/DateTools$Resolution;
            aastore
            dup
            iconst_4
            getstatic org.apache.lucene.document.DateTools$Resolution.MINUTE:Lorg/apache/lucene/document/DateTools$Resolution;
            aastore
            dup
            iconst_5
            getstatic org.apache.lucene.document.DateTools$Resolution.SECOND:Lorg/apache/lucene/document/DateTools$Resolution;
            aastore
            dup
            bipush 6
            getstatic org.apache.lucene.document.DateTools$Resolution.MILLISECOND:Lorg/apache/lucene/document/DateTools$Resolution;
            aastore
            putstatic org.apache.lucene.document.DateTools$Resolution.ENUM$VALUES:[Lorg/apache/lucene/document/DateTools$Resolution;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>(java.lang.String, int, int);
    descriptor: (Ljava/lang/String;II)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=6, locals=4, args_size=4
        start local 0 // org.apache.lucene.document.DateTools$Resolution this
        start local 3 // int formatLen
         0: .line 205
            aload 0 /* this */
            aload 1
            iload 2
            invokespecial java.lang.Enum.<init>:(Ljava/lang/String;I)V
         1: .line 206
            aload 0 /* this */
            iload 3 /* formatLen */
            putfield org.apache.lucene.document.DateTools$Resolution.formatLen:I
         2: .line 209
            aload 0 /* this */
            new java.text.SimpleDateFormat
            dup
            ldc "yyyyMMddHHmmssSSS"
            iconst_0
            iload 3 /* formatLen */
            invokevirtual java.lang.String.substring:(II)Ljava/lang/String;
            getstatic java.util.Locale.ROOT:Ljava/util/Locale;
            invokespecial java.text.SimpleDateFormat.<init>:(Ljava/lang/String;Ljava/util/Locale;)V
            putfield org.apache.lucene.document.DateTools$Resolution.format:Ljava/text/SimpleDateFormat;
         3: .line 210
            aload 0 /* this */
            getfield org.apache.lucene.document.DateTools$Resolution.format:Ljava/text/SimpleDateFormat;
            getstatic org.apache.lucene.document.DateTools.GMT:Ljava/util/TimeZone;
            invokevirtual java.text.SimpleDateFormat.setTimeZone:(Ljava/util/TimeZone;)V
         4: .line 211
            return
        end local 3 // int formatLen
        end local 0 // org.apache.lucene.document.DateTools$Resolution this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    5     0       this  Lorg/apache/lucene/document/DateTools$Resolution;
            0    5     3  formatLen  I
    MethodParameters:
               Name  Flags
      $enum$name     
      $enum$ordinal  
      formatLen      

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.apache.lucene.document.DateTools$Resolution this
         0: .line 217
            aload 0 /* this */
            invokespecial java.lang.Enum.toString:()Ljava/lang/String;
            getstatic java.util.Locale.ROOT:Ljava/util/Locale;
            invokevirtual java.lang.String.toLowerCase:(Ljava/util/Locale;)Ljava/lang/String;
            areturn
        end local 0 // org.apache.lucene.document.DateTools$Resolution this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/lucene/document/DateTools$Resolution;

  public static org.apache.lucene.document.DateTools$Resolution[] values();
    descriptor: ()[Lorg/apache/lucene/document/DateTools$Resolution;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=3, args_size=0
         0: .line 1
            getstatic org.apache.lucene.document.DateTools$Resolution.ENUM$VALUES:[Lorg/apache/lucene/document/DateTools$Resolution;
            dup
            astore 0
            iconst_0
            aload 0
            arraylength
            dup
            istore 1
            anewarray org.apache.lucene.document.DateTools$Resolution
            dup
            astore 2
            iconst_0
            iload 1
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
            aload 2
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static org.apache.lucene.document.DateTools$Resolution valueOf(java.lang.String);
    descriptor: (Ljava/lang/String;)Lorg/apache/lucene/document/DateTools$Resolution;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
         0: .line 1
            ldc Lorg/apache/lucene/document/DateTools$Resolution;
            aload 0
            invokestatic java.lang.Enum.valueOf:(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Enum;
            checkcast org.apache.lucene.document.DateTools$Resolution
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    MethodParameters:
      Name  Flags
      name  
}
Signature: Ljava/lang/Enum<Lorg/apache/lucene/document/DateTools$Resolution;>;
SourceFile: "DateTools.java"
NestHost: org.apache.lucene.document.DateTools
InnerClasses:
  public final Resolution = org.apache.lucene.document.DateTools$Resolution of org.apache.lucene.document.DateTools