java - 警告 : [unchecked] unchecked call to put(K, V) 作为原始类型 java.util.Hashtable localParams.put(name, values) 的成员；

Question

我有两个警告:-- 第一个是:

HELPDESKGESTION2\src\java\glpi\filter\LoginFilter.java:289: warning: [unchecked] unchecked call to put(K,V) as a member of the raw type java.util.Hashtable
                    localParams.put(key, value);
                                   ^

--第二个是:

HELPDESKGESTION2\src\java\glpi\filter\LoginFilter.java:292: warning: [unchecked] unchecked call to put(K,V) as a member of the raw type java.util.Hashtable
            localParams.put(name, values);
                           ^

生成此警告的代码是:

public void setParameter(String name, String []values) {
    if (debug) System.out.println("LoginFilter::setParameter(" + name + "=" + values + ")" + " localParams = "+ localParams);

    if (localParams == null) {
    localParams = new Hashtable();
    // Copy the parameters from the underlying request.
    Map wrappedParams = getRequest().getParameterMap();
    Set keySet = wrappedParams.keySet();
    for (Iterator it = keySet.iterator(); it.hasNext(); ) {
        Object key = it.next();
        Object value = wrappedParams.get(key);
        localParams.put(key, value);
    }
    }
    localParams.put(name, values);
}

Answer 1

替换:

localParams = new Hashtable();

与:

localParams = new Hashtable<String,String>();

我假设您有一个如下所示的全局变量:

private Hashtable localParams;

将其替换为:

private Hashtable<String,String> localParams;

如果您进行我建议的更改，警告将会消失，但您还必须将所有对象替换为字符串；