发现java泛型一个很有意思,有用的现象_JAVA_编程开发_程序员俱乐部

public class IkEn {
	
	private String id;
	
	private String lang;
	
	private Integer ky;
	
	private String val;

	//....(这里,我省略get,set方法,读者可以自己加上去)

}

public class Test {

	public static void main(String[] args) {
		List list = new ArrayList();
		Map<String, Object> maps = new LinkedHashMap<String, Object>();
		maps.put("id", "12323");
		maps.put("ky", new Integer(1));
		maps.put("lang", "zh_cn");
		maps.put("val", "value");
		list.add(maps);
		//关键在这里,居然没有报类型转换异常,LinkedHashMap自动转换成了IkEn实体类
		List<IkEn> enTmps = (List<IkEn>)list;
		System.out.println(enTmps);
	}

}