multimodule.App.java Source code

Introduction

Here is the source code for multimodule.App.java

Source

/*
 * Copyright (c) 2012-2017 Red Hat, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Red Hat, Inc. - initial API and implementation
 */
package multimodule;

import multimodule.model.Book;
import multimodule.model.BookImpl;

import java.util.Objects;

public class App {

    public static void main(String... args) {
        Book book1 = new BookImpl("java", "oracle"); // to invoke constructor BookImpl(title, author)
        Book book2 = BookImpl.create("go", "google"); // to invoke static method BookImpl.create(title, author)

        if (!book2.isEquals(book1)) { // to invoke default method Book.isEquals()
            Book.printInfo(book1); // to invoke default static method Book.printInfo(book)
        }

        // external lib ch.qos.logback with sources which are accessible by maven; need to download sources from maven repo.
        org.slf4j.Logger logbackLogger = org.slf4j.LoggerFactory.getLogger(App.class);
        logbackLogger.info(concat("Info from ", "logbackLogger", ' '));
    }

    /**
     * Returns concatination of two strings into one divided by special symbol.
     *
     * @deprecated As of version 1.0, use {@link org.apache.commons.lang.StringUtils#join(Object[], char)}
     *
     * @param part1
     *          part 1 to concat.
     * @param part2
     *          part 2 to concat.
     * @param divider
     *          divider of part1 and part2.
     * @return concatination of two strings into one.
     *
     * @throws NullPointerException
     *       if one of the part has null value.
     */
    public static String concat(String part1, String part2, char divider) throws NullPointerException {
        Objects.nonNull(part1);
        Objects.nonNull(part2);

        return part1 + divider + part2;
    }
}