The Class Class and Reflection

Reflection Example

다음은  Command 라인에서 입력된 클래스의 메소드를 실행(Invoke)하는 예제이다.

 

package reflect;   import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method;   class Invoke {        public static void main(String[] args) {               try {                      Class c = Class.forName(args[0]);                      Method m = c.getMethod(args[1]);                      Object ret = m.invoke(null);                      System.out.println("Invoked static method: " + args[1] + " of class: " + args[0]                                   + " with no args\nResults: " + ret);                 } catch (ClassNotFoundException e) {                      System.out.println(e);               } catch (NoSuchMethodException e2) {                      System.out.println(e2);               } catch (IllegalAccessException e3) {                      System.out.println(e3);               } catch (InvocationTargetException e) {                      System.out.println(e);                      System.out.println("Method threw an: " + e.getTargetException());               }        } }

 

% java   java.lang.System   currentTimeMillis

 

결과 : 

Invoked static method: currentTimeMillis of class: java.lang.System with no args

Results: 1360164595776