simplefilter.java

Sun公司的J2ME官方例程若干

/*
 * Copyright (c) 2000-2001 Sun Microsystems, Inc. All Rights Reserved.
 */

package examples.addressbook;

import java.lang.*;
import java.io.*;
import java.util.*;
import javax.microedition.rms.*;

/**
 * This class implements the RecordFilter interface.
 * It works on the records created by SimpleRecord.
 * It filters on first name and/or last name.
 */
public class SimpleFilter implements RecordFilter {

    // first and last names on which to filter
    private String first;
    private String last;

    /**
     * Public constructor: stores the first and last
     * names on which to filter. Stores first/last
     * names as lower case so that filters are
     * are case-insensitive.
     */
    public SimpleFilter(String f, String l) {
        first = f.toLowerCase();
        last = l.toLowerCase();
    }

    /**
     * Takes a record, (r), and checks to see if it matches
     * the first and last name set in our constructor.
     *
     * Extracts the first and last names from the record,
     * converts them to lower case, then compares them
     * with the values extracted from the record.
     *
     * return true if record matches, false otherwise
    */
    public boolean matches(byte[] r) {

        String f = SimpleRecord.getFirstName(r).toLowerCase();
        String l = SimpleRecord.getLastName(r).toLowerCase();

        return f.startsWith(first) && l.startsWith(last);
    }
}