case p_ev.VK_UP: {           <- line 131
            setValue(++value);
            break;
          }
          case p_ev.VK_DOWN: {
            setValue(--value);
            break;
          }
        }

John McGrath writes:

JBuilder is correctly reporting an error in your code. The expression in a case label must be a compile-time constant expression. According to the Java Language Specification, if you reference a static final variable using an object reference, that is not considered a compile time constant. However if you reference the variable using the class name, then it is considered a constant expression. So it should compile without error if you change your code to:

           case KeyEvent.VK_UP:

Note that when you specify the JDK for JBuilder to use, that only affects the runtime classes that it uses to compile with. JBuilder always uses its own compiler.

I presume that when you compiled from the command line, you were using the javac compiler from JDK 1.2. If you compile the same code with the javac from JDK 1.3, it will report an error as well. Sun fixed the bug in their compiler with the 1.3 release.

2001-Feb-15 1:43pm gyles19@visi.com