김효원, Swindler, coolx 님의 홈페이지

Programming

No.

766

Name.

swindler

Subject.

java reflection

Main Cate.

Java

Sub Cate.

Date.

2014-03-05 09:47

Hit.

3169 (211.36.27.3)

File.

import java.lang.reflect.Field

필드명을 가져오는 방법

Class _class = ChampionDto.class;

Field[] fields = _class.getDeclaredFields();

for ( int i = 0; i < fields.length; i++ )
{
System.out.println(fields[i].getName());
}

여기서 getFields를 사용하면 public fields 만 가져오게 된다.

===중략

Test test = new Test(); //필드가 포함되어 있는 class
Field fd = test.getClass().getDeclaredField("필드명");

//"필드명"의 값 가져오기
String testFieldVal = (String)fd.get(test); //필드 객체의 get 함수에 class 객체를 넘기고
//해당 변수의 형으로 캐스팅

import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;

public class Reflective {

public void message(String choice) throws NoSuchMethodException, NullPointerException, SecurityException, IllegalAccessException, InvocationTargetException {
this.getClass().getDeclaredMethod(choice, (Class[]) null).invoke(this);
}

public void hello() {
System.out.println("hello");
}

public static void main(String[] args) {
try {
Reflective r = (Reflective) Class.forName("Reflective").newInstance();
r.message("hello");
} catch (NoSuchMethodException e) {
System.out.println(e);
} catch (NullPointerException e) {
System.out.println(e);
} catch (ClassNotFoundException e) {
System.out.println(e);
} catch (SecurityException e) {
System.out.println(e);
} catch (InstantiationException e) {
System.out.println(e);
} catch (IllegalAccessException e) {
System.out.println(e);
} catch (InvocationTargetException e) {
System.out.println(e);
}
}
}

JavaDoc Link

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