@Override public void onPause() { super.onPause(); save(notes.itemSelected); } @Override public void onResume() { super.onResume(); notes.itemSelected.clear(); notes.itemSelected = load(); } ...

I am trying to read an ASN1 object using Bouncycastle on Android. I expect it to be a DERSequence, which in Bouncycastle is a subclass of ASN1Sequence, which is a subclass of ASN1Object. import or...

I have implemented this function: static <X,Y> Y castOrNull(X obj) { try { return (Y)obj; } catch(ClassCastException e) { return null; } } This gives me the compiler warning: Type...

I have a Java EE application and I use Hibernate. The domain objects, I changed the List / ArrayList to Set / HashSet, because it is better to use Sets. But in my Dao implementation I run into a p...

In what circumstances can ClassCastException occur in the code below: import java.util.Arrays; import java.util.List; public class Generics { static List getObjects() { return Arrays.asList(1,...

public class Empty { public static void main( String[] args ) { TreeSet<Class> classes = new TreeSet<Class>(); classes.add( String.class ); String test = new String(); try{ i...

List<MyClass> myclassList = (List<MyClass>) rs.get(); TreeSet<MyClass> myclassSet = new TreeSet<MyClass>(myclassList); I don't understand why this code generates this: j...

I have a preferences.xml that looks like this: <?xml version="1.0" encoding="utf-8"?> <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"> <EditTextPrefer...

I am reading about Java Generics and I came across this topic where I am a bit confused. From : http://www.angelikalanger.com/GenericsFAQ/FAQSections/ProgrammingIdioms.html#FAQ205 public abstract...

Since generics are only checked during compile time with Java 5, can they avoid ClassCastExceptions in all situations?

I think there must be something subtle going on here that I don't know about. Consider the following: public class Foo<T> { private T[] a = (T[]) new Object[5]; public Foo() { // Add som...