String in switch java

Question

switch(title)
   {
    case "Return":
          returnBooks();
          break;
  }

strings in switch are not supported in -source 1.6, use -source 7 or higher to enable strings in switch

So, I have already installed JDK7, Why compiler show this message and giving an error while on compiling?

I am using NetBeans

Answer 1

I hate to say it, but: read the darn error message. It tells you exactly what the problem is.

You are compiling in Java 6 mode, not compiling in Java 7 mode. If you're using javac that comes with JDK 7, as the error message says, use the -source 7 flag:

> javac -source 7 {stuff here}