Module: AP 计算机科学第二部分 2016

class Recipients
{
    /** The list of lines in the mailing list */
    private List<String> lines;
    /** Constructor. Fill lines with mailing list data.
     * Postcondition:
     * - Each element in lines is one line of the mailing list.
     * - Lines appear in the list in the same order
     * that they appear in the mailing list.
     * - Blank line separators in the mailing list are stored
     * as empty strings.
     */
    public Recipients(List<String> lines)
    {
        /* implementation not shown */
        this.lines = lines;
    }
    /** Postcondition: Returns the city contained in the cityZip
     * string of an address.
     * @param cityZip contains the city, state, and zipcode
     * line of an address
     * @return the city substring contained in cityZip
     */
    public String extractCity(String cityZip)
    {                 

}
    /** Precondition: The recipient name is the first line of each
     * label on the mailing list.
     * Postcondition: Prints a list of recipient names to console,
     * one per line.
     */
    public void printNames()
    {                 

}
/** Postcondition: Returns the address of the recipient with
     * the specified name.
     * @param name a name in the lines ArrayList
     * @return the address of the recipient with the given name
     */
    public String getAddress(String name)
    {                 

}
}