UseRegularExpression.java

import java.io.*;
 
public class UseRegularExpression { 
    public static void main(String args[]) 
                              throws IOException { 
        BufferedReader reader = 
            new BufferedReader(
                new InputStreamReader(System.in));
 
        System.out.println("abcdefgabcabc".replaceAll(".bc", "###")); 
 
        String phoneEL = "[0-9]{4}-[0-9]{6}";
        String urlEL = "<a.+href*=*['\"]?.*?['\"]?.*?>";
        String emailEL = "^[_a-z0-9-]+(.[_a-z0-9-]+)*" + 
                         "@[a-z0-9-]+(.[a-z0-9-]+)*$";

        System.out.print("輸入手機號碼: "); 
        String input = reader.readLine();
 
        if(input.matches(phoneEL)) 
            System.out.println("格式正確"); 
        else 
            System.out.println("格式錯誤");
 
        System.out.print("輸入href標籤: "); 
        input = reader.readLine();
 
        // 驗證href標籤 
        if(input.matches(urlEL))
            System.out.println("格式正確"); 
        else
            System.out.println("格式錯誤");
 
        System.out.print("輸入電子郵件: "); 
        input = reader.readLine();
 
        // 驗證電子郵件格式 
        if(input.matches(emailEL))
            System.out.println("格式正確"); 
        else
            System.out.println("格式錯誤"); 
    } 
}