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ClassCastException when using HQL


ClassCastException when using HQL

By : pffred
Date : October 25 2020, 07:29 PM
wish helps you If you don't know which it will be (Integer or Long), you can cast to Number and call intValue() or longValue(). This way an Integer or a Long will work.
code :


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Why am I getting this ClassCastException?

Why am I getting this ClassCastException?


By : Praveen Jain
Date : March 29 2020, 07:55 AM
this one helps. Because LocationType is the superclass; it can't be cast to the subclass.
To explain a bit further: you can only cast up the inheritance tree, which is to say, an object can only be cast as the class type it was created as, any of its superclasses, or any interface that it implements. Thus, a String can be cast as either a String or an Object; a HashMap can be cast as a HashMap, an AbstractMap Map, or an Object.
How to Get rid of ClassCastException

How to Get rid of ClassCastException


By : Avinash
Date : March 29 2020, 07:55 AM
around this issue You can't, unless B derives from A.
That's the point of a ClassCastException.
Getting ClassCastException

Getting ClassCastException


By : VeeRa Kadam
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further First of all, if you used generic collections rather than raw types (Map> instead of Hashtable), those errors would be caught by the compiler.
Forget about Vector, Hashtable and Enumeration. They should not be used anymore since Java 1.2.
code :
Enumeration events = listEvent.keys();
while (events.hasMoreElements()) {
    String key = (String) events.nextElement();
    if (key.equals(label1.getText())) {
       Vector object = (Vector) listEvent.get(key);
Vector object = (Vector) listEvent.get(label1.getText());
ClassCastException - an ADT bug?

ClassCastException - an ADT bug?


By : Dominic Versace
Date : March 29 2020, 07:55 AM
wish helps you Changes to widgets in a layout file should be reflected in corresponding files residing in other res/layout-* folders. Or, these changes should be handled appropriately in code.
Why i get ClassCastException?

Why i get ClassCastException?


By : user3654194
Date : March 29 2020, 07:55 AM
I wish did fix the issue. So i have constructor that looks so: , The key line is here:
code :
Map<String, List<String>> rawGroups = (Map) holder.config.getConfigurationSection(HEADING).getValues(true);
public static void main (String[] args)
{
    Map<String, List<String>> m = (Map)getMap();
    try {
        System.out.println(m.get("entry").get(0)); // Fails here
    }
    catch (Exception e) {
        System.out.println("Failed: " + e.getMessage());
        e.printStackTrace(System.out);
    }
}
static Object getMap() {
    Map m = new HashMap();
    List l = new LinkedList();
    l.add(42);
    m.put("entry", l);
    return m;
}
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