CODEWITHSUNDEEP
javaregexreplace
Code Vader
Code Vader

Reputation: 755

Regex replace an email

In my SQLite database I have a composite key that comprises of an email and a tutorial name (it's an e-learning app) such as [email protected] 1 or [email protected] 3. I'm having problem splitting the two when I use them later on. I want to get the tutorial (Tutorial 1) and email ([email protected]) separately. Seems straightforward but I'm struggling?

Here'se what I've tried so far:

    String Key = cursor.getString(cursor.getColumnIndex("key"));
    String email = Key.replace("^(.*)(Tutorial)(\\s)(\\d+)$", "$1");
    String Tutorial = Key.replace("^(.*)(Tutorial)(\\s)(\\d+)$", "$2$3$4");

However when I use print statements later on, nothing is replaced or changed. Any ideas? Or is there a simpler way to do this?

Upvotes: 0

Views: 114

Answers (3)

aioobe
aioobe

Reputation: 420951

You need to use replaceAll (and not replace) if you want to work with regexps. But in this case I'd recommend that you simply do:

int i = input.lastIndexOf("Tutorial");
String email = input.substring(0, i);
String tutorial = input.substring(i);

If you really want to go with regexps, I'd recommend something like

String key = "^(.*)(Tutorial \\d+)$";
String email = input.replaceAll(key, "$1");
String tutorial = input.replaceAll(key, "$2");

Upvotes: 1

Avinash Raj
Avinash Raj

Reputation: 174706

I think you want something like this,

System.out.println("[email protected] 1".replaceAll("^(.*?@[^A-Z]+)([A-Z]\\S+\\s*\\d+)$", "$1 $2"));
System.out.println("[email protected] 1".replaceAll("^(.*?@[^A-Z]+)([A-Z]\\S+\\s*\\d+)$", "$1"));
System.out.println("[email protected] 1".replaceAll("^(.*?@[^A-Z]+)([A-Z]\\S+\\s*\\d+)$", "$2"));

Output:

[email protected] Tutorial 1
[email protected]
Tutorial 1

DEMO

Group 1 contains the email id and group 2 contains the string Tutorial and following number.

Upvotes: 0

Luís Ramalho
Luís Ramalho

Reputation: 10208

If you want to go with regex, then something like this should work:

    String pattern = "(.+)(Tutorial\\s\\d+)";
    Pattern r = Pattern.compile(pattern);
    String[] s = { "[email protected] 1",
            "[email protected] 3" };
    for (String str : s) {
        Matcher m = r.matcher(str);
        if (m.find()) {
            System.out.println(m.group(1));
            System.out.println(m.group(2));
        }
    }

Upvotes: 0

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