regular expression (regex)

package Ekspresi_Reguler;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexMatches
{
    private static String REGEX = "kambing";
    private static String INPUT = "kambing makan rumput."
                                    + "semua kambing makan rumput.";
    private static String REPLACE = "sapi";


    public static void main(String[] args)
    {
        Pattern p = Pattern.compile(REGEX);
        // get a matcher object
        Matcher m = p.matcher(INPUT);
        INPUT = m.replaceAll(REPLACE);
        System.out.println(INPUT);
    }

}