UJO Framework为对象提供了一种有别于JavaBeans的架构。最初的想法来源于Java5.0的范型。但是，随着时间的流逝，这种架构表现一些激动人心的特性：

• 很轻松实现对象的自省(introspection)而不再需要笨重的PropertyDescriptor实现
• 一个transfer UJO对象属性可以是集合(并非values)
• 核心部分才两个接口(Ujo和UjoProperty)，实现起来非常简单。

代码示例：

import java.util.HashMap;
import org.ujoframework.*;
import org.ujoframework.core.UjoManager;
import org.ujoframework.implementation.map.*;

@SuppressWarnings("unchecked")
public class Person implements Ujo {
    
  public static final MapProperty NAME = new MapProperty("Name", String.class);
  public static final MapProperty MALE = new MapProperty("Male", Boolean.class);
  public static final MapProperty CASH = new MapProperty("Cash", 0d);
  
  // --- The start of the MapUjo implementation ---
  private HashMap map = new HashMap();  
  public Object readValue(UjoProperty property) {
    Object result = map.get(property);
    return result!=null ? result : property.getDefault();
  }
  public void writeValue(UjoProperty property, Object value) {
    map.put(property, value);
  }
  public UjoProperty[] readProperties() {
    return UjoManager.getInstance().readProperties(getClass());
  }
  public boolean readAuthorization(UjoAction action, UjoProperty property, Object value) {
    return true;
  } // --- The end of MapUjo implementation ---

  /** Add cash in the Ujo implementation */
  public void addCash(double cash) {
    double newPrice = CASH.of(this) + cash;
    CASH.setValue(this, newPrice);
  }
}

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