/**
 * Class for returning statics for page replacement algorithm.
 */
public class PageReplacerStats {

    // see print() method for explanation of variables
    public int refs = 0;
    public int writeRefs = 0;
    public int pageFaults = 0;
    public int pageWriteOuts = 0;
    private String id;

    /** 
      * Constructor. 
      * @param id string to print (something that identifies the page
      *   replacement algorithm
      */
    public PageReplacerStats(String id) {
        this.id = id;
    }

    /**
     * Print all information to System.out.
     */
    public void print() {
        System.out.println("Statistics for " + id + ":");
        System.out.println("Total number of references:  " + refs);
        System.out.println("Total number of write references:  " + writeRefs);
        System.out.println("Number of page faults:  " + pageFaults);
        System.out.println("Number of times a page was written out:  " + 
                pageWriteOuts);
    }
}