反射备忘

public class TestMain {

 

/**

* @param args

*/

public static void main(String[] args) {

WorkMate mate = new WorkMate();

try {

Class mateClass = mate.getClass();

for(Field field : mateClass.getDeclaredFields()){

System.out.println(field.getName());

}

Field field =  mate.getClass().getDeclaredField("thisName");

field.setAccessible(true);

field.set(mate, "wiseideal");

Class[] parameterTypes = new Class[1];

parameterTypes[0] = String.class;

mate.getClass().getDeclaredMethod("sayHei", parameterTypes).invoke(mate, "What's Up");

} catch (IllegalArgumentException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (SecurityException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IllegalAccessException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (NoSuchFieldException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (NoSuchMethodException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (InvocationTargetException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

 

 

}

 

static class WorkMate{

String thisName = "chaos";

public void sayHei(String msg){

System.out.println(thisName+" said : "+msg);

}

}

 

}