CODEWITHSUNDEEP
javaswitch-statement
Elijah
Elijah

Reputation: 1322

java switch statement with multiple cases and case ranges

I wanted to find a way to do this in java 6, but it doesn't exist:

switch (c) {
  case ['a'..'z']: return "lower case" ;

There was a proposal to add this to the java language some time ago: http://mail.openjdk.java.net/pipermail/coin-dev/2009-March/000213.html, has anything materialized in java 7?

What are other ways to rewrite this code in java 6, that would read more like a switch/case:

if (theEnum == MyEnum.A || theEnum == MyEnum.B){
}else if(), else if, else if...

Upvotes: 0

Views: 5724

Answers (5)

Chirlo
Chirlo

Reputation: 6130

The simplest thing would be:

if (Character.isLowerCase(c)){
    return "lowercase";
}

Which will also work with á ö and the sort

Upvotes: 2

Dave Newton
Dave Newton

Reputation: 160291

Or:

if (inRange(c, 'a', 'z')) {
    ...
}

or use a regex like normal, or a map, or...

With regards to your enum expression, it depends on what you're actually doing, but it might just be a map with implementations or values.

Upvotes: 0

Andrew
Andrew

Reputation: 13863

To the first part, one options for strings

if(c.equals(c.toLowerCase())) return "lower case";

To the second part, you can use switch with enums....

switch(theEnum){
  case A:
  case B:
     break;
  case C:
     break;
  ...
}

Upvotes: 0

pencil
pencil

Reputation: 1145

You could do something like:

switch (c) {
    case 'a':
    case 'b':
    case 'c':
    //...
        doSomething();
        break;
}

Upvotes: 2

shift66
shift66

Reputation: 11958

How about this? 

if(c>='a' && c<='z')
    return "lower case";

Upvotes: 1

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