// bubbleSort.java
// demonstrates bubble sort
// to run this program: C>java BubbleSortApp
////////////////////////////////////////////////////////////////
class ArrayBub
   {
   private long[] a;                 // ref to array a
   private int nElems;               // number of data items
//--------------------------------------------------------------
   public ArrayBub(int max)          // constructor
      {
      a = new long[max];                 // create the array
      nElems = 0;                        // no items yet
      }
//--------------------------------------------------------------
   public void insert(long value)    // put element into array
      {
      a[nElems] = value;             // insert it
      nElems++;                      // increment size
      }
//--------------------------------------------------------------
   public void display()             // displays array contents
      {
      for(int j=0; j<nElems; j++)       // for each element,
         System.out.print(a[j] + " ");  // display it
      System.out.println("");
      }
//--------------------------------------------------------------
   public void bubbleSort()
      {
      int out, in;

      for(out=nElems-1; out>1; out--)   // outer loop (backward)
         for(in=0; in<out; in++)        // inner loop (forward)
            if( a[in] > a[in+1] )       // out of order?
               swap(in, in+1);          // swap them
      }  // end bubbleSort()
//--------------------------------------------------------------
   private void swap(int one, int two)
      {
      long temp = a[one];
      a[one] = a[two];
      a[two] = temp;
      }
//--------------------------------------------------------------
   }  // end class ArrayBub
////////////////////////////////////////////////////////////////
class BubbleSortApp
   {
   public static void main(String[] args)
      {
      int maxSize = 100;            // array size
      ArrayBub arr;                 // reference to array
      arr = new ArrayBub(maxSize);  // create the array

      arr.insert(77);               // insert 10 items
      arr.insert(99);
      arr.insert(44);
      arr.insert(55);
      arr.insert(22);
      arr.insert(88);
      arr.insert(11);
      arr.insert(00);
      arr.insert(66);
      arr.insert(33);

      arr.display();                // display items

      arr.bubbleSort();             // bubble sort them

      arr.display();                // display them again
      }  // end main()
   }  // end class BubbleSortApp
////////////////////////////////////////////////////////////////