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PE/COFF 4J is a java engineering library for portable executables, the format used by Windows.

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/*******************************************************************************
 * This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at 
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     Peter Smith
 *******************************************************************************/
package org.boris.pecoff4j.util;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

public class Reflection {
	public static String toString(Object o) {
		StringBuilder sb = new StringBuilder();
		Field[] fields = o.getClass().getDeclaredFields();
		for (Field f : fields) {
			if (Modifier.isStatic(f.getModifiers()))
				continue;
			f.setAccessible(true);
			sb.append(f.getName());
			sb.append(": ");
			try {
				Object val = f.get(o);
				if (val instanceof Integer) {
					sb.append(f.get(o));
					sb.append(" (0x");
					sb.append(Integer.toHexString(((Integer) val).intValue()));
					sb.append(")");
				} else if (val instanceof Long) {
					sb.append(f.get(o));
					sb.append(" (0x");
					sb.append(Long.toHexString(((Long) val).longValue()));
					sb.append(")");
				} else if (val != null && val.getClass().isArray()) {
					if (val instanceof int[]) {
						int[] arr = (int[]) val;
						for (int i = 0; i < arr.length && i < 10; i++) {
							if (i != 0)
								sb.append(", ");
							sb.append(arr[i]);
						}
					} else if (val instanceof byte[]) {
						byte[] arr = (byte[]) val;
						for (int i = 0; i < arr.length && i < 10; i++) {
							if (i != 0)
								sb.append(", ");
							sb.append(Integer.toHexString(arr[i] & 0xff));
						}
					} else {
						Object[] arr = (Object[]) val;
						for (int i = 0; i < arr.length && i < 10; i++) {
							if (i != 0)
								sb.append(", ");
							sb.append(arr[i]);
						}
					}
				} else {
					sb.append(f.get(o));
				}
			} catch (Exception e) {
				sb.append(e.getMessage());
			}
			sb.append("\n");
		}
		return sb.toString();
	}

	public static String getConstantName(Class clazz, int value)
			throws Exception {
		Field[] fields = clazz.getDeclaredFields();
		Integer valObj = new Integer(value);
		for (int i = 0; i < fields.length; i++) {
			Field f = fields[i];
			if (Modifier.isStatic(f.getModifiers())
					&& Modifier.isPublic(f.getModifiers())) {
				if (f.get(null).equals(valObj)) {
					return f.getName();
				}
			}
		}

		return null;
	}

	public static void println(Object o) {
		System.out.println(toString(o));
	}
}