Method calling

[RajatJ]

I have following methods say method1(), method2(),�..method15(). I need to call all these method at one place. Is it possible to put them in a loop rather than calling each of them individually. Something like this:
for (int I=1;I<21;I++){
//call methods here
}

[Scott Appleton]

Rajat, you can collect all the methods into a Method[] array using the getDeclaredMethods() from Class, and iterate through the array -- but I'm not sure how you would actually call the methods within the loop. I'm not 100% sure it's even possible to call a method whose name (entirely or in part) is in a variable.

[Cindy Glass]

Well, it took a bit, and it is not pretty, but it CAN be done using reflection.

<font size=2.5>
import java.lang.reflect.*;
class Test {
    
   void callMethods() throws NoSuchMethodException, 
                             ClassNotFoundException, 
                             IllegalAccessException,
                             InvocationTargetException{
       Class thisClass = Class.forName("Test");
       for ( int i=1 ; i<4 ; i++){
           String s = "Method" + i;
           Method m = thisClass.getDeclaredMethod(s,null);
                      m.invoke(this, null); 
              }
   }
   void Method1(){
       System.out.println("doing Method1");
   }
   void Method2(){
       System.out.println("doing Method2");
   }
   void Method3(){
       System.out.println("doing Method3");
   }
   public static void main(String[] args)throws NoSuchMethodException, 
                             ClassNotFoundException, 
                             IllegalAccessException,
                             InvocationTargetException{
            Test t = new Test();
            t.callMethods();
       } 
}

[Scott Appleton]

"invoke"...that's pretty sweet.
Reflection is one thing I just love about Java. I was able to use it to good advantage in a WebColor class I created (which assigns names to all 216 WebSafe colors -- e.g., "WebColor.jade", etc.), but until I saw your invoke method, I didn't realize that you could actually use it to call methods without specifying the precise name of the method.
Beauty is in the eye of the beholder...I think that's some pretty snazzy code.