Java Switch Statement - Is or and possible

Question

I implemented a font system that finds out which letter to use via char switch statements  There are only capital letters in my font image  I need to make it so that  for example   a  and  A  both have the same output  Instead of having 2x the amount of cases  could it be something like the following   char c   switch c   case  a   amp   A     get the  A  image    break  case  b   amp   B     get the  B  image    break      case  z   amp   Z     get the  Z  image    break      Is this possible in java

User · Answer

Above  you mean OR not AND  Example of AND  110  amp  011    010 which is neither of the things you re looking for   For OR  just have 2 cases without the break on the 1st  Eg   case  a   case  A        do stuff   break

User · Answer

You can use switch-case fall through by omitting the break  statement   char c      whatever      switch c        case  a       case  A             get the  A  image          break      case  b       case  B             get the  B  image          break                   case  z       case  Z             get the  Z  image          break         or you could just normalize to lower case or upper case before switching   char c   Character toUpperCase    whatever       switch c        case  A             get the  A  image          break      case  B             get the  B  image          break                   case  Z             get the  Z  image          break

User · Answer

Observations on an interesting Switch case trap --  fall through of switch   The break statements are necessary because without them  statements in switch blocks fall through   Java Doc s example   Snippet of consecutive case without break       char c    A     switch with lower case         switch c            case  a               System out println  a            case  A               System out println  A                break          O P for this case is   A  But if you change value of c  i e   char c    a    then this get interesting   O P for this case is   a A  Even though the 2nd case test fails  program goes onto print A  due to missing break which causes switch to treat the rest of the code as a block  All statements after the matching case label are executed in sequence

User · Answer

The above are all excellent answers  I just wanted to add that when there are multiple characters to check against  an if-else might turn out better since you could instead write the following      switch on vowels  digits  punctuation  or consonants char c     assign some character to  c  if   aeiouAEIOU  indexOf c     -1         handle vowel case   else if            indexOf c     -1         handle punctuation case   else if   0123456789  indexOf c     -1         handle digit case   else        handle consonant case  assuming other characters are not possible     Of course  if this gets any more complicated  I d recommend a regex matcher

User · Answer

From what I understand about your question  before passing the character into the switch statement  you can convert it to lowercase  So you don t have to worry about upper cases because they are automatically converted to lower case  For that you need to use the below function   Character toLowerCase c

[java] Java Switch Statement - Is "or"/"and" possible?

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