Pick string which contains both alphabets and numbers from the following strings

Question

package regEx;

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

public class ReGex {

    public static void main(String[] args) {

        String[] s = {"asd", "123", "123abc", "@#$", "ASSF"};
        Pattern p = Pattern.compile("^[A-Z]*[a-z]*[0-9]*+$");
        for (String s1 : s) {
            Matcher m = p.matcher(s1);
            if (m.find()) {
                System.out.println(s1);
            }
        }
    }
}

"^[A-Z]*[a-z]*[0-9]*+$" should be "^[A-Za-z0-9]+$". I recommend regex101 or similar sites to test your regexes. — Fildor, Sep 20 '17 at 07:15
https://stackoverflow.com/questions/11241690/regex-for-checking-if-a-string-is-strictly-alphanumeric Try Above — Ram Singh, Sep 20 '17 at 07:17
not enough info @ManoChandran Please read [ask] and improve question. — Fildor, Sep 20 '17 at 07:27
You have to change the title to **Pick string which contains both alphabets and numbers from the following strings** — Youcef LAIDANI, Sep 20 '17 at 07:30

Youcef LAIDANI · Answer 1 · 2017-09-20T07:26:14.113

2

Why not just s1.matches("[A-Za-z0-9]+") instead :

String[] s = {"asd", "123", "123abc", "@#$", "ASSF"};
for (String s1 : s) {
    if (s1.matches("[A-Za-z0-9]+")) {
        System.out.println(s1);
    }
}

Your regex ^[A-Z]*[a-z]*[0-9]*+$ not mean to match alphanumeric strings, it means :

^ start of string
should start with zero or more Upper Letter [A-Z]*
followed by zero or more Lower Letter [a-z]*
followed by zero or more degits [0-9]*
+ i don't see why this
$ end of string

Edit

I think you mean the input should contains both alphabets and numbers in this case you can use this regex instead (?=.*[0-9])(?=.*[a-zA-Z])([a-zA-Z0-9]+):

if (s1.matches("(?=.*[0-9])(?=.*[a-zA-Z])([a-zA-Z0-9]+)")) {

edited Sep 20 '17 at 07:26

answered Sep 20 '17 at 07:16

Youcef LAIDANI

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i got the following output: asd 123 123abc ASSF – Mano Chandran Sep 20 '17 at 07:17
and what you should to get @ManoChandran ? – Youcef LAIDANI Sep 20 '17 at 07:18
1

@ManoChandran According to your question title, this is the desired output. – Fildor Sep 20 '17 at 07:18
i want only the alphanumeric one. i.e. 123abc @YCF_L – Mano Chandran Sep 20 '17 at 07:20
@ManoChandran in this case you can use `(?=.*[0-9])(?=.*[a-zA-Z])([a-zA-Z0-9]+)` check my edit – Youcef LAIDANI Sep 20 '17 at 07:26

Pick string which contains both alphabets and numbers from the following strings

1 Answers1