shellsor.java

java sort

/*
 * BubbleSortAlgorithm.java
 *
 */

/**
 * A Shell's sort demonstration algorithm
 * ShellSortAlgorithm.java
 *
 * @author Patrick Morin
 */
class ShellSortAlgorithm extends SortAlgorithm {
  void sort(int a[]) throws Exception {
    for (int incr = a.length / 2; incr > 0; incr /= 2) {
      for(int i = incr; i < a.length; i++) {
	int j = i - incr;
	while(j >= 0) {
	  compex(j, j+incr);
	  pause();
	  if (a[j] > a[j+incr]) {
	    int T = a[j];
	    a[j] = a[j+incr];
	    a[j+incr] = T;
	    j -= incr;
	  }
	  else {
	    j = -1;
	  }
	}
	pause();
      }
    }
  }
}