FileComparator.java

package com.limegroup.gnutella.util;

import java.io.File;
import java.io.Serializable;
import java.util.Comparator;

/**
 * Compares two File's lexically by file name).  Useful for storing Java 1.1.8
 * Files in Java 1.2+ sorted collections classes.  This is needed because Files
 * in 1.1.8 do not implement the Comparable interface, unlike Files in 1.2+.
 */
final class FileComparator implements Comparator, Serializable {
    static final long serialVersionUID = 879961226428880051L;

    /** Returns (((File)a).getAbsolutePath()).compareTo(
     *              ((File)b).getAbsolutePath()) 
     *  Typically you'll want to make sure a and b are canonical files,
     *  but that isn't strictly necessary.
     */
    public int compare(Object a, Object b) {
        String as=((File)a).getAbsolutePath();
        String bs=((File)b).getAbsolutePath();
        return as.compareTo(bs);
    }
}