Inner Classes
Submitted by Shimaa on Wed, 2006-02-15 02:30.
A class defined within another class is called a nested class. Like other members of a class, a nested class can be declared static or not. A nonstatic nested class is called an inner class. An instance of an inner class can exist only within an instance of its enclosing class and has access to its enclosing class's members even if they are declared private.
Nested classes
Can access all fields
Can be static
You can declare an inner class without naming it
public class Stack {
private Object[] items;
//code for Stack's methods and constructors
not shown
public Iterator iterator() {
return new Iterator() {
int currentItem = items.size() - 1;
public boolean hasNext() {
...
}
public Object next() {
...
}
public void remove() {
...
}
}
}
}
A nested class declared within a method or other smaller block of code has access to any final or local variables in scope.
