An example of a method for extracting Numbers from Java regular expressions

@Test
    public void test33() {
        String phoneString = " Ha ha ,13888889999";
        //Extraction of digital
        // 1
        Pattern pattern = Pattern.compile("[^0-9]");
        Matcher matcher = pattern.matcher(phoneString);
        String all = matcher.replaceAll("");
        System.out.println("phone:" + all);
        // 2
        Pattern.compile("[^0-9]").matcher(phoneString).replaceAll("");
    }

  Extract zhang SAN and remove the number

@Test
    public void test() {
        //Extract and remove Numbers
        String r_name3 = " Zhang SAN  13599998888 000000";
        Pattern pattern = Pattern.compile("[\d]");
        Matcher matcher = pattern.matcher(r_name3);
        System.out.println(matcher.replaceAll("").trim());
    }