https://lucene.apache.org/lucene-parent/lucene-analyzers-kuromoji: Lucene Kuromoji Japanese Morphological Analyzer (The Apache Software Foundation) 
public final class org.apache.lucene.analysis.ja.dict.UnknownDictionary extends org.apache.lucene.analysis.ja.dict.BinaryDictionary
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.apache.lucene.analysis.ja.dict.UnknownDictionary
  super_class: org.apache.lucene.analysis.ja.dict.BinaryDictionary
{
  private final org.apache.lucene.analysis.ja.dict.CharacterDefinition characterDefinition;
    descriptor: Lorg/apache/lucene/analysis/ja/dict/CharacterDefinition;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(org.apache.lucene.analysis.ja.dict.BinaryDictionary$ResourceScheme, java.lang.String);
    descriptor: (Lorg/apache/lucene/analysis/ja/dict/BinaryDictionary$ResourceScheme;Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
        start local 1 // org.apache.lucene.analysis.ja.dict.BinaryDictionary$ResourceScheme scheme
        start local 2 // java.lang.String path
         0: .line 35
            aload 0 /* this */
            aload 1 /* scheme */
            aload 2 /* path */
            invokespecial org.apache.lucene.analysis.ja.dict.BinaryDictionary.<init>:(Lorg/apache/lucene/analysis/ja/dict/BinaryDictionary$ResourceScheme;Ljava/lang/String;)V
         1: .line 27
            aload 0 /* this */
            invokestatic org.apache.lucene.analysis.ja.dict.CharacterDefinition.getInstance:()Lorg/apache/lucene/analysis/ja/dict/CharacterDefinition;
            putfield org.apache.lucene.analysis.ja.dict.UnknownDictionary.characterDefinition:Lorg/apache/lucene/analysis/ja/dict/CharacterDefinition;
         2: .line 36
            return
        end local 2 // java.lang.String path
        end local 1 // org.apache.lucene.analysis.ja.dict.BinaryDictionary$ResourceScheme scheme
        end local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    3     0    this  Lorg/apache/lucene/analysis/ja/dict/UnknownDictionary;
            0    3     1  scheme  Lorg/apache/lucene/analysis/ja/dict/BinaryDictionary$ResourceScheme;
            0    3     2    path  Ljava/lang/String;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
        Name  Flags
      scheme  
      path    

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
         0: .line 39
            aload 0 /* this */
            invokespecial org.apache.lucene.analysis.ja.dict.BinaryDictionary.<init>:()V
         1: .line 27
            aload 0 /* this */
            invokestatic org.apache.lucene.analysis.ja.dict.CharacterDefinition.getInstance:()Lorg/apache/lucene/analysis/ja/dict/CharacterDefinition;
            putfield org.apache.lucene.analysis.ja.dict.UnknownDictionary.characterDefinition:Lorg/apache/lucene/analysis/ja/dict/CharacterDefinition;
         2: .line 40
            return
        end local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/apache/lucene/analysis/ja/dict/UnknownDictionary;
    Exceptions:
      throws java.io.IOException

  public int lookup(char[], int, int);
    descriptor: ([CII)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=7, args_size=4
        start local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
        start local 1 // char[] text
        start local 2 // int offset
        start local 3 // int len
         0: .line 43
            aload 0 /* this */
            getfield org.apache.lucene.analysis.ja.dict.UnknownDictionary.characterDefinition:Lorg/apache/lucene/analysis/ja/dict/CharacterDefinition;
            aload 1 /* text */
            iload 2 /* offset */
            caload
            invokevirtual org.apache.lucene.analysis.ja.dict.CharacterDefinition.isGroup:(C)Z
            ifne 2
         1: .line 44
            iconst_1
            ireturn
         2: .line 48
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.analysis.ja.dict.UnknownDictionary.characterDefinition:Lorg/apache/lucene/analysis/ja/dict/CharacterDefinition;
            aload 1 /* text */
            iload 2 /* offset */
            caload
            invokevirtual org.apache.lucene.analysis.ja.dict.CharacterDefinition.getCharacterClass:(C)B
            istore 4 /* characterIdOfFirstCharacter */
        start local 4 // byte characterIdOfFirstCharacter
         3: .line 49
            iconst_1
            istore 5 /* length */
        start local 5 // int length
         4: .line 50
            iconst_1
            istore 6 /* i */
        start local 6 // int i
         5: goto 9
         6: .line 51
      StackMap locals: int int int
      StackMap stack:
            iload 4 /* characterIdOfFirstCharacter */
            aload 0 /* this */
            getfield org.apache.lucene.analysis.ja.dict.UnknownDictionary.characterDefinition:Lorg/apache/lucene/analysis/ja/dict/CharacterDefinition;
            aload 1 /* text */
            iload 2 /* offset */
            iload 6 /* i */
            iadd
            caload
            invokevirtual org.apache.lucene.analysis.ja.dict.CharacterDefinition.getCharacterClass:(C)B
            if_icmpne 10
         7: .line 52
            iinc 5 /* length */ 1
         8: .line 50
            iinc 6 /* i */ 1
      StackMap locals:
      StackMap stack:
         9: iload 6 /* i */
            iload 3 /* len */
            if_icmplt 6
        end local 6 // int i
        10: .line 58
      StackMap locals:
      StackMap stack:
            iload 5 /* length */
            ireturn
        end local 5 // int length
        end local 4 // byte characterIdOfFirstCharacter
        end local 3 // int len
        end local 2 // int offset
        end local 1 // char[] text
        end local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
      LocalVariableTable:
        Start  End  Slot                         Name  Signature
            0   11     0                         this  Lorg/apache/lucene/analysis/ja/dict/UnknownDictionary;
            0   11     1                         text  [C
            0   11     2                       offset  I
            0   11     3                          len  I
            3   11     4  characterIdOfFirstCharacter  B
            4   11     5                       length  I
            5   10     6                            i  I
    MethodParameters:
        Name  Flags
      text    
      offset  
      len     

  public org.apache.lucene.analysis.ja.dict.CharacterDefinition getCharacterDefinition();
    descriptor: ()Lorg/apache/lucene/analysis/ja/dict/CharacterDefinition;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
         0: .line 62
            aload 0 /* this */
            getfield org.apache.lucene.analysis.ja.dict.UnknownDictionary.characterDefinition:Lorg/apache/lucene/analysis/ja/dict/CharacterDefinition;
            areturn
        end local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/lucene/analysis/ja/dict/UnknownDictionary;

  public java.lang.String getReading(int, char[], int, int);
    descriptor: (I[CII)Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=5, args_size=5
        start local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
        start local 1 // int wordId
        start local 2 // char[] surface
        start local 3 // int off
        start local 4 // int len
         0: .line 67
            aconst_null
            areturn
        end local 4 // int len
        end local 3 // int off
        end local 2 // char[] surface
        end local 1 // int wordId
        end local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lorg/apache/lucene/analysis/ja/dict/UnknownDictionary;
            0    1     1   wordId  I
            0    1     2  surface  [C
            0    1     3      off  I
            0    1     4      len  I
    MethodParameters:
         Name  Flags
      wordId   
      surface  
      off      
      len      

  public java.lang.String getInflectionType(int);
    descriptor: (I)Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
        start local 1 // int wordId
         0: .line 72
            aconst_null
            areturn
        end local 1 // int wordId
        end local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    1     0    this  Lorg/apache/lucene/analysis/ja/dict/UnknownDictionary;
            0    1     1  wordId  I
    MethodParameters:
        Name  Flags
      wordId  

  public java.lang.String getInflectionForm(int);
    descriptor: (I)Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
        start local 1 // int wordId
         0: .line 77
            aconst_null
            areturn
        end local 1 // int wordId
        end local 0 // org.apache.lucene.analysis.ja.dict.UnknownDictionary this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    1     0    this  Lorg/apache/lucene/analysis/ja/dict/UnknownDictionary;
            0    1     1  wordId  I
    MethodParameters:
        Name  Flags
      wordId  

  public static org.apache.lucene.analysis.ja.dict.UnknownDictionary getInstance();
    descriptor: ()Lorg/apache/lucene/analysis/ja/dict/UnknownDictionary;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 81
            getstatic org.apache.lucene.analysis.ja.dict.UnknownDictionary$SingletonHolder.INSTANCE:Lorg/apache/lucene/analysis/ja/dict/UnknownDictionary;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
SourceFile: "UnknownDictionary.java"
NestMembers:
  org.apache.lucene.analysis.ja.dict.UnknownDictionary$SingletonHolder
InnerClasses:
  public final ResourceScheme = org.apache.lucene.analysis.ja.dict.BinaryDictionary$ResourceScheme of org.apache.lucene.analysis.ja.dict.BinaryDictionary
  private SingletonHolder = org.apache.lucene.analysis.ja.dict.UnknownDictionary$SingletonHolder of org.apache.lucene.analysis.ja.dict.UnknownDictionary