Deal with enum type and its method : Enum « Reflection « Java






Deal with enum type and its method

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 *
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 *
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 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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import static java.lang.System.out;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

enum Charge {
  POSITIVE, NEGATIVE, NEUTRAL;
  Charge() {
    out.format("under construction%n");
  }
}

public class EnumTrouble {

  public static void main(String... args) {
    try {
      Class<?> c = Charge.class;

      Constructor[] ctors = c.getDeclaredConstructors();
      for (Constructor ctor : ctors) {
        out.format("Constructor: %s%n", ctor.toGenericString());
        ctor.setAccessible(true);
        ctor.newInstance();
      }

      // production code should handle these exceptions more gracefully
    } catch (InstantiationException x) {
      x.printStackTrace();
    } catch (IllegalAccessException x) {
      x.printStackTrace();
    } catch (InvocationTargetException x) {
      x.printStackTrace();
    }
  }
}

 








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