/**

* Book: Data Structures and Algorithms in Java, by Robert LaFore

* Chapter 3:

* bubbleSort.java

* demonstrates bubble sort

* to compile this code: javac bubbleSort.java

* to run this program: 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