Validate URL Address with Regular Expression in Java

Run Application

Create new java file named Main.java. This file use Regular Expression check validate url address as below:

package regular_expression;

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

public class Main {

	private static boolean isValid(String url) {
		String urlPattern = "^(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]";
		Pattern pattern = Pattern.compile(urlPattern, Pattern.CASE_INSENSITIVE);
		Matcher matcher = pattern.matcher(url);
		return matcher.matches();
	}

	public static void main(String[] args) {

		String url1 = "abc.com";
		boolean result1 = isValid(url1);
		System.out.println("Result 1: " + result1);

		String url2 = "http://abc.com";
		boolean result2 = isValid(url2);
		System.out.println("Result 2: " + result2);

	}

}

Output

Result 1: false
Result 2: true