Length of an object array

You can use getLength method from java.lang.reflect.Array, which uses reflection (so it'll be slow):

Object[] anArray = new Object[2];
int length = Array.getLength(anArray);

No matter the type an array is, we only have .length but NOT .length()

Arrays in Java are not resizable. Once an array is instantiated, its length cannot change. That's why the length attribute (myArray.length) can always be trusted to contain the array's length.