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cannot be cast to Java


cannot be cast to Java

By : user2172657
Date : October 23 2020, 08:10 AM
wish helps you Darbuotojas cannot be cast to Programuotojas is pretty clear, and does not deal with int to String or String to int
Because you have Programuotojas extends Darbuotojas you could save a Programuotojas instance in a Darbuotojas object, but not in the other side, imagine another class Foo extends Darbuotojas you can't do
code :
Darbuotojas foo = new Foo();
Programuotojas bar = (Programuotojas) foo;
Programuotojas darbProgramuotojas = (Programuotojas) darbuotojas;
if (darbuotojuArray.get(userSelectsEmployeeID) instanceof Programuotojas) {
    //...
    Programuotojas darbProgramuotojas = (Programuotojas) darbuotojuArray.get(userSelectsEmployeeID);
}


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Java Class Cast Exception thrown even though the cast-from parent class is actually an instance of the cast-to subclass

Java Class Cast Exception thrown even though the cast-from parent class is actually an instance of the cast-to subclass


By : samot79
Date : March 29 2020, 07:55 AM
hope this fix your issue
but the Thread returned by mvThreadSource.newThread(new BackgroundThread()) should actually be an instance of BackgroundThread
java generics - cast to List<SomeType> issues unchecked cast warning while cast to SomeType not

java generics - cast to List<SomeType> issues unchecked cast warning while cast to SomeType not


By : Antony Roberts
Date : March 29 2020, 07:55 AM
it fixes the issue You get the warning because the cast (List) data is not safe. Due to type erasure, List will be List during runtime, so there will be no real type check regarding the element type of the list. That is, that cast will succeed even if you get List as a parameter and later you will get a ClassCastException when you try to access the list:
code :
ScanResult result = data.get(0); // ClassCastException: String
public interface DataProvider<T> {
    public List<byte[]> getData(T data);
}
public class DataProviderFromLocation implements DataProvider<Location> {
    public List<byte[]> getData(Location data) {
    }
}

public class DataProviderFromScanResultList implements DataProvider<List<ScanResult>> {
    public List<byte[]> getData(List<ScanResult> data) {
    }
}
gradle class cast exception: cannot cast to 'java.lang.iterable'

gradle class cast exception: cannot cast to 'java.lang.iterable'


By : divya
Date : March 29 2020, 07:55 AM
this will help I have an android project for which I am writing a build.gradle file. I have some dependency library projects as well which will reside in the root folder. So the structure of the folders will be something like the following, , Nevermind, it was sourceset issue.
code :
 manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = {'src'}
            resources.srcDirs = {'src'}
            aidl.srcDirs = {'src'}
            renderscript.srcDirs = {'src'}
            res.srcDirs = {'res'}
            assets.srcDir = {'assets'}
  manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            resources.srcDirs = ['src']
            aidl.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            res.srcDirs = ['res']
            assets.srcDir = ['assets']
Java Overload resolution - Why m(cast, cast) instead of m(match, cast)

Java Overload resolution - Why m(cast, cast) instead of m(match, cast)


By : Ruian
Date : March 29 2020, 07:55 AM
I hope this helps . I'm pretty sure I can't be the first one to stumble over this but I can't find an answer. This is homework. , Here :
code :
Vogel v1 = new Vogel();                
Karpfen k = new Karpfen();
...
Super sup2 = new Sub();
...
sup2.m(v1, k);   //4 expected, got 3
public void m(Tier t1, Tier t2){
    System.out.println("1");
}

public void m(Tier t, Fisch f){
    System.out.println("2");
}

public void m(Fisch f, Tier t){
    System.out.println("5");
}
public void m(Tier t, Fisch f){
    System.out.println("2");
}
public void m(Tier t1, Fisch t2){
    System.out.println("3");
}
sup2.m(v1, f);  //4 expected, got 3
Class cast Exception: java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.Long

Class cast Exception: java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.Long


By : Deeja
Date : March 29 2020, 07:55 AM
With these it helps The reason it is showing the exception is that PropertyDAO.findAHRCategoryCodesByPartnerIdAndCodeList1() or one of the methods it is calling is attempting to cast a List into a Long.
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