JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

Publish Your Article Here

How to match a format in string using regular expression?


Description:

Below example shows how to match a string pattern with a regular expression. String.matches() method helps to match the string with a regex. Below example checkes weather given string starts with "www" or not.


Code:
package com.myjava.string;

public class MyStrMatches {

    public static void main(String a[]){
    
        String[] str = {"www.java2novice.com", "http://java2novice.com"};
        for(int i=0;i < str.length;i++){
            if(str[i].matches("^www\\.(.+)")){
                System.out.println(str[i]+" Starts with 'www'");
            } else {
                System.out.println(str[i]+" is not starts with 'www'");
            }
        }
    }
}

Example Output

www.java2novice.com Starts with 'www'
http://java2novice.com is not starts with 'www'

Other String Function Examples

Knowledge Centre
Stream and types of Streams
A Stream is an abstraction that either produces or consumes information. There are two types of Streams and they are:

Byte Streams: Provide a convenient means for handling input and output of bytes. Byte Streams classes are defined by using two abstract classes, namely InputStream and OutputStream.

Character Streams: Provide a convenient means for handling input & output of characters. Character Streams classes are defined by using two abstract classes, namely Reader and Writer.
Famous Quotations
Success consists of going from failure to failure without loss of enthusiasm.
-- Winston Churchill

About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

Most Visited Pages

Other Interesting Sites

Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
Privacy Policy | Copyright © 2022 by Nataraja Gootooru. All Rights Reserved.