How to use regular expression in Java

最新推荐文章于 2017-12-01 17:01:19 发布

linlin9111

最新推荐文章于 2017-12-01 17:01:19 发布

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分类专栏： damn java 文章标签： Java

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This tip shows the way to validate a string with respect to a regular expression. java.util.regex package is used for regular expression related operations.

In this example the input string (inputStr) is validated with the regular expression (rgString).

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

public class RegularExpExp {
    
    public static void main(String[] args) {
        
        String rgString = "write your regulat expression here";
        CharSequence inputStr = "write your input string that need to be validated";
        Pattern pattern = Pattern.compile(rgString);
        Matcher matcher = null;
        matcher = pattern.matcher(inputStr);
        
        if (matcher.matches()) {
            System.out.println("Matched");
        } else {
            System.out.println("Not Matched");
        }
    }
}