动态赋予java类的属性set与get值

public class Contact {
	private String name;
	private String tel;
	private attrControl attrC=new attrControl();
	private class attrControl{
		public Map<String,Object> map=new HashMap();
		public Object isExist;
		public Map createAttr(String a,String value){
			Object obj=(Object)value;
			isExist=map.get(a);
			if(isExist==null){
				map.put(a,obj);
			}
			map.put(a,obj);
			return map;
		}
	}
	public void setObj(String newAttr,String value){
		 attrC.createAttr(newAttr,value);
	}
	public Object getObj(String newAttr){
		 Map a=attrC.map;
		 return a.get(newAttr);
	}
	public static void main(String[] args){
		Contact a =new Contact();
		a.setObj("mail", "827387@kjj.com");
		a.setObj("area", "882");
		System.out.println("mail:"+String.valueOf(a.getObj("mail")));
		System.out.println("area:"+Integer.parseInt(a.getObj("area").toString()));
	}
}