Source of 6.9.java

Structures and functions

  1: public void push(T newEntry)
  2: {
  3:    checkInitialization();
  4:    ensureCapacity();
  5:    stack[topIndex + 1] = newEntry;
  6:    topIndex++;
  7: } // end push
  8: 
  9: private void ensureCapacity()
 10: {
 11:    if (topIndex >= stack.length - 1) // If array is full, double its size
 12:    {
 13:       int newLength = 2 * stack.length;
 14:       checkCapacity(newLength);
 15:       stack = Arrays.copyOf(stack, newLength);
 16:    } // end if
 17: } // end ensureCapacity
 18: // Version 4.0