Java Iterator in C++

I am a Java user and I am getting into C++ and in Java it allows classes to reveal Iterable types so clients can traverse some instance’s collection of data. Is there any way to obtain this …

How to add an object during ListIterator (reversed) iteration properly?

I have been asked from my professor to add an object in the middle of an ArrayedList using listiterator. I have tried doing in the following way first: ListIterator < Employee > …

java.util.ConcurrentModificationException while mutating an object

I am iterating over a List of CustomObject and while doing this iteration, I am mutating this object by adding a tag to tags list of this custom object. I am not adding or removing any CustomObject to …

Backward Traverse using ListIteartor in java

I am new to java and learning from a very basic level. I am trying to run this below code which is not showing any result in the console. It’s only working when I add forward traverse code before it. …

Iterator vs for

I was asked in an interview what is the advantage of using iterator over for loop or what is the advantage of using for loop over iterator? Can any body please answer this?

hasPrevious() Method not working

I don’t understand why my hasPrevious iterator is not functioning, it looks like this: public void previousSong(){ Iterator iterator = songs.iterator(); if(iterator.hasPrevious()) { …

Why is this ArrayList throwing a ConcurrentModificationException when I try to remove an element?

I’m trying to remove a particular element from Arraylist, it throws an ConcurrentModificationException ArrayList ar = new ArrayList(); ar.add(“a”); ar.add(“b”); ar.add(“c”)…

Does using an Iterator over a TreeMap in Java interfere with the order of keys?

I want to know that if using an Iterator over a TreeMap in Java interfere with the order of keys?