文件大小排序

/**
 * 文件排序
*/
class CompratorByLastModified implements Comparator<File> {
public int compare(File f1, File f2) {
long diff = f1.length() - f2.length();
if (diff > 0)
return -1;//倒序正序控制
else if (diff == 0)
return 0;
else
            return 1;//倒序正序控制
}
public boolean equals(Object obj) {
return true;
}
}

/**
 * 文件排序
*/
class CompratorByLastModified implements Comparator<File> {
public int compare(File f1, File f2) {
long diff = f1.length() - f2.length();
if (diff > 0)
return -1;//倒序正序控制
else if (diff == 0)
return 0;
else
            return 1;//倒序正序控制
}
public boolean equals(Object obj) {
return true;
}
}