Switch statement with string as argument in Android

Question

I would like to use a switch statement as in Java 1.7 which also allows switch(someString). However if I change the java compiler to 1.7 the project breaks and I either have to go back to 1.5 or use android tools-> fix project.

Is there any way to use switch with Strings in android development?

The answer provided in this link (stackoverflow.com/questions/338206/…) shows you how to somewhat work around the switch with string restriction before java 7. If you do not want this approach, you're stuck with if/elses. — bsimic
– bsimic, Commented Feb 14, 2012 at 19:45
Possible duplicate of stackoverflow.com/questions/14367629/… — Shubham Chaudhary
– Shubham Chaudhary, Commented Aug 26, 2015 at 11:44

nicholas.hauschild · Accepted Answer · 2012-02-14 20:18:14Z

5

EDIT

Personally, I have not tried, but according to the Android System Requirements page, it is unsupported. That said, it does not mean that it wouldn't work, just that you are unlikely to receive much/any help on the subject from Google/Android.

JDK 5 or JDK 6 (JRE alone is not sufficient)

On a potentially positive note, (found with the help of @Emil H and his comment) I have found these bit of information online:

From Dalvik on Wikipedia:

Programs are commonly written in a dialect of Java and compiled to bytecode. Then they are converted from Java Virtual Machine-compatible .class files to Dalvik-compatible .dex (Dalvik Executable) files...

If the bytecode doesn't change from version 6 to 7 (excluding the added invokedynamic mentioned by @David Schwartz, which switch statements should not be using.), then it should work...

edited Feb 14, 2012 at 20:18

answered Feb 14, 2012 at 19:36

nicholas.hauschild

42.9k9 gold badges129 silver badges120 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Emil L Over a year ago

Are you sure about this. I thought that the dex compiler worked with the byte code. And as far as I know there is java 7 does not add anything new at the byte code level... I could be wrong thou...

David Schwartz Over a year ago

@EmilH Java 7 adds at least invokedynamic to the Java byte code per JSR292.

Emil L Over a year ago

@David Scwartz Yeah, but Java doesn't use that right? It is mainly to increase support for dynamic languages on the jvm like Jython etc?

nicholas.hauschild Over a year ago

Excellent points. I have updated my answer to reflect this information.

Community · Accepted Answer · 2017-05-23 12:06:16Z

1

You should be able to use JDK7 with android. Check this answer to a related question:

https://stackoverflow.com/a/7481063/355499

EDIT:

Tried it out locally and everything works fine with JDK7 (it's what I use when developing). However, I can't find a way to change the compliance level from 1.6 to 1.7 in my android project. If you really want to do this I guess you would have to resort to building your project by some other means than using Eclipse. For instance using an ant script or similar. Might be a bit more work than it is worth though.

edited May 23, 2017 at 12:06

CommunityBot

11 silver badge

answered Feb 14, 2012 at 19:49

Emil L

21.2k3 gold badges48 silver badges71 bronze badges

Comments

lory105 · Accepted Answer · 2013-06-19 14:28:09Z

0

For now it is no possible: although in Java 1.7 compiler it was introduced the switch statement with String, unfortunately Android requires version 1.6 or 1.5. So we have to wait.

answered Jun 19, 2013 at 14:28

lory105

6,3404 gold badges33 silver badges40 bronze badges

Collectives™ on Stack Overflow

Switch statement with string as argument in Android

3 Answers 3

4 Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

4 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related