Java Errs

"illegal modifier for parameter sum; only final is permitted

 

The modifiers private, protected, and public cannot be used on variables inside of a method. This is because you can only have local variables inside of methods.

Java is simply telling you that the only modifier allowed at that time is the final keyword.

 

Switch only applies to digit or one-char, not string

 

在有多个选择路径的情况下，利用Switch可以使程序更加简洁有效。但由于其只能对整数选择因子进行判断，所以限制了其在其他类型尤其是String的使用，本文利用JDK1.5新推出的enum，实现了一种可以对String类型进行Switch的方法。直接看代码：

   1. enum EnumExample 
   2. {
   3.      Teamreq,Matreq;
   4. }
   5. public class EnumTest {
   6.     public static void main(String[] argc)
   7.     {
   8.         String str = "Matreq";
   9.         EnumExample test = EnumExample.valueOf(str);
  10.         switch (test)
  11.         {
  12.         case Matreq:
  13.             System.out.println("Matreq");
  14.             break;
  15.         case Teamreq:
  16.             System.out.println("Teamreq");
  17.             break;
  18.         default:
  19.             break;
  20.         }
  21.         
  22.     }
  23.
  24. }
转自：http://blog.youkuaiyun.com/pqw1157/archive/2009/01/06/3721619.aspx