StringStartsWith.java

package com.levelup.java.string;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import org.apache.commons.lang3.StringUtils;
import org.junit.Test;

/**
 * This java example will demonstrate checking if a string starts with
 * character.
 * 
 * @author Justin Musgrove
 * @see <a
 *      href='http://www.leveluplunch.com/java/examples/string-starts-with/'>String
 *      starts with</a>
 * 
 */
public class StringStartsWith {

	@Test
	public void string_starts_with_java() {

		boolean startsWithHttp = "http://www.leveluplunch.com"
				.startsWith("http");

		assertTrue(startsWithHttp);
	}

	@Test
	public void string_starts_with_regular_expression_with_java() {

		boolean startsWithHttpsOrFTP = "http://www.leveluplunch.com"
				.startsWith("^(https?|ftp)://.*$");

		assertFalse(startsWithHttpsOrFTP);
	}

	@Test
	public void string_starts_with_apache_commons() {

		boolean startsWithHttp = StringUtils.startsWith(
				"http://www.leveluplunch.com", "http");

		assertTrue(startsWithHttp);
	}

	@Test
	public void string_starts_with_any_apache_commons() {

		boolean startsWithHttpProtocol = StringUtils
				.startsWithAny("http://www.leveluplunch.com", new String[] {
						"http", "https" });

		assertTrue(startsWithHttpProtocol);
	}

	@Test
	public void string_starts_with_spring() {

		boolean startsWithHttp = org.springframework.util.StringUtils
				.startsWithIgnoreCase("http://www.leveluplunch.com", "http");

		assertTrue(startsWithHttp);
	}

}