Java中定义Map常量，List常量

一般的方式的使用静态代码块。比如：

public final static Map map = new HashMap();  
static {  
    map.put("key1", "value1");  
    map.put("key2", "value2");  
}

下面为一种简单定义Map常量的方式

public final static Map<String, Fragment> NAV_ITEM_ADPTER = new HashMap<String, Fragment>() {
    {
        put("拍录传", new CameraFragment());
        put("集群对讲", new GroupTalkFragment());
        put("视通", new VideoCallFragment());
        put("位置", new PositionFragment());
        put("浏览", new BrowseFragment());
        put("消息", new MsgFragment());
        put("群组", new GroupFragment());
        put("设置", null);
        put("退出", null);
    }
};

List的话则可以这样定义：

public final static List<String> LIST = Arrays.asList("one","two","three");