How can I make my push() method work properly within private ArrayLists and other constraints **below**?
49
What is a NullPointerException, and how do I fix it?
135208
Why is a public copy constructor required even if it is not invoked?
5724
Why does my ArrayList contain N copies of the last item added to the list?
153317
Why is it allowed to access a private field of another object?
31737
Why aren't static data members allowed in local classes?
129660
Why is array.push sometimes faster than array[n] = value?
36203
Why isn't ArrayList marked [Obsolete]?
55951
Passing arraylist of objects between activities
25288
How to make HashMap work with Arrays as key?
105667
How do I put an arraylist in a Listbox
147603
How can I call a method in an object from outside the JVM?
29243
Java: Array of primitive data types does not autobox
5608
Overriding the java equals() method - not working?
58054
When is it OK to catch NullPointerException?
80941
Java - Updating JList after changing an object
10867
How to avoid ArrayIndexOutOfBoundsException or IndexOutOfBoundsException?
89487
Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?